DESC:FIELD OF THE INVENTION
[001] The present invention relates to a blow moulded pipe, and a method for manufacturing the blow moulded pipe. The blow moulded pipe may be made of a plastic material and may be used for channelling a fluid. For example, the blow moulded pipe may be employed for channelling air or gas therethrough for an air intake system or a turbocharger of an internal combustion engine.
BACKGROUND OF THE INVENTION
[002] A vehicle forms an inseparable part of our life and are employed for transportation of people and cargo. Attempts are being made to improve the fuel efficiency of the vehicles. For example, some metal components of the vehicle are replaced with light-weight material components, wherein the light-weight material can be a plastic. More specifically, various pipes, or tubes, or conduits employed for conveying fluids such as air, fuel, oil, etc., have been replaced by plastic pipes, or tubes, or conduits (referred to as pipe(s) hereinafter) thereby reducing the overall weight of the vehicle and hence improving fuel efficiency thereof.
[003] A typical pipe comprises a hollow tubular body made of plastic material and may have one or more open ends. The pipe may be made by any technique, for example, blow moulding. The one or more open ends of the pipe may be connected to sources and sinks of fluids to be conveyed therethrough. For example, a plastic pipe may be connected between an air filter system and air intake manifold of a vehicle. The ends of the plastic pipe are received in and connected to respective connectors at the air filter system and the air intake manifold and are further secured thereto using a clamp each.
[004] To avoid collapsing or breaking of the plastic pipe ends due to tightening force of the clamps, a metal ring, which serves as a reinforcement, is fitted at and around the one or more ends of the pipe. More specifically, the metal ring is securely fitted into the ends of the pipe. The metal ring provides enough strength to the ends of the pipe so that the ends can withstand the load or force exerted thereon due to tightening of the clamps.
[005] Reference is now made to FIG. 1, wherein FIG. 1 illustrates a flow chart (100) depicting steps involved in the conventional method for manufacturing a plastic pipe with a metal ring reinforcement fitted at and around ends thereof. Typically, the method of fitting the metal ring at and around the ends of the pipe includes the following steps:
[006] Step 1: The pipe comprising the one or more open ends is manufactured by regular blow moulding process employing a blow mouldable plastic material and a suitable mould (102).
[007] Step 2: The blow moulded pipe so obtained in the step 1 is then allowed to cool for a time of about 24 hours (104).
[008] Step 3: The cooled pipe is now processed further wherein the balloon is cut (106).
[009] Step 4: The pipe so obtained in the step 3 is then bored at ends thereof creating a space for the placement of the metal ring therein (108).
[0010] Step 5: The ends of the pipe are heated to a predetermined temperature to soften the portion of the pipe at and around the end(s) thereof (110).
[0011] Step 6: A metal ring having suitable dimensions is pressed fitted into the heated softened ends and the pipe is then allowed to cool (112).
[0012] However, the above-mentioned method of fitting the metal ring is observed to have several disadvantages.
[0013] One disadvantage of the conventional method is that an additional step of boring the pipe ends is required.
[0014] Another disadvantage of the conventional method is that there is bulging of the pipe due to fitment of the metal ring. The word “bulging” herein includes deformation of the pipe or ends thereof, which may result in change in diameter and/or ovality of the pipe.
[0015] Still another disadvantage of the conventional method is that the pipe may crack rending it unusable.
[0016] Yet another disadvantage of the conventional method is that the cost of manufacturing the pipe with the metal rings fitted at and around ends thereof increases due to the additional time-consuming steps of boring, and pipe heating.
[0017] Another disadvantage of the conventional method is that the powder coating on the metal ring peels off during the fitment process.
[0018] Another disadvantage of the conventional method is that the during the step of boring plastic burr is generated which needs to be cleaned off.
[0019] Another disadvantage of the conventional method is that the metal ring may protrude outside the pipe or may be loosely fitted. It is necessary to have skilled operators to prevent the problems of protrusion and loose-fitting of the metal ring.
[0020] Further, for the pipes with the metal rings fitted therein, manufactured using the conventional method a high rejection rate is observed due to the above-mentioned problems or disadvantages. This results in loss of productivity, time, and money.
[0021] Therefore, there is an urgent need for providing a suitable alternative to the conventional method of manufacturing the pipe with the metal ring fitted thereto. There is also a need for eliminating the metal ring fitment and provide a pie with reinforced ends which can withstand load or force of clamping.
OBJECTS OF THE INVENTION
[0022] Some of the objects of the presently disclose invention, of which at the minimum one object is fulfilled by at least one embodiment disclosed herein, are as follows:
[0023] An object of the present invention is to provide an alternative, which overcomes at least one drawback encountered in the existing prior art.
[0024] Another object of the present invention is to provide a plastic moulded pipe which is sturdy, especially at ends, does not collapse when clamps are secured to ends thereof and/or crack.
[0025] Still another object of the present invention is to provide a method for manufacturing a plastic moulded pipe using a blow moulding process, wherein the method eliminates need for insertion of a metallic ring at the end of the metallic pipe.
[0026] Yet another object of the present invention is to provide a method for manufacturing a plastic moulded pipe using a blow moulding process, wherein the method is economic, has reduced time span, does not require the steps of cooling, and then reheating for fixing the metallic ring, does not require the step of machining, and other related problems mentioned herein above
[0027] Other objects and benefits of the present invention will be more apparent from the following description, which is not intended to bind the scope of the present invention.
SUMMARY OF THE INVENTION
[0028] Disclosed is a blow moulded pipe, and a method for manufacturing the blow moulded pipe, which may be employed for channelling air or gas therethrough for an air intake system or a turbocharger of an internal combustion engine.
[0029] In accordance with one aspect of the present invention, the blow moulded pipe comprising a body a body , the body having a hollow tubular shape with a diameter in the range of 20 mm to 300 mm, a thickness in the range of 1 mm to 10 mm, an insert extending in an operatively vertically upward direction from an outer surface of the blow moulded pipe, the insert comprising a body, the body having a base edge, a first side edge extending from one side of the base edge, a second side edge extending from another side of the base edge, a top edge bridging the first side edge and the second side edge, wherein the first and the second side edges being inclined at an angle with respect to a perpendicular to the surface of the blow moulded pipe, wherein the angle being in the range of 0? to 45?, wherein the base edge having a length in the range of 10 mm to 50 mm, the first side edge having a length in the range of 5 mm to 50 mm, the second side edge having a length in the range of 5 mm to 50 mm, the top edge having a length in the range of 5 mm to 50 mm, wherein the width of the body is in the range of 1 mm to 5 mm.
[0030] In accordance with one embodiment of the present invention, the number of inserts is in the range of 1 to 25, wherein the inserts are configured to be received in and engage with apertures of a rubber hose, the rubber hose having a hollow tubular shape and is received over the end of the blow moulded pipe.
[0031] In accordance with another aspect of the present invention, a method for manufacturing a blow moulded pipe is disclosed. The method characterized by having the steps of providing a mould comprising cavities, maintaining the mould at a temperature in the range of 20 ?C to 35 ?C, disposing inserts with the mould, operatively disposing a parison tube within the mould, applying a stress force to the parison tube, operatively inserting a blow pin into the parison tube, conjoining the cavities thereby closing the mould and enclosing the parison tube therein, blowing a pressurized fluid into the parison tube through the blow pin, thereby inflating the parison tube such that the walls of the parison tube flush against an inner surface of the mould and that of the inserts and that the shape of the inflated parison tube conforms to the shape of the mould and that of the inserts , wherein a portion of the wall of the inflated parison tube engages with the inserts, maintaining the pressurized fluid within the inflated parison tube for a time period, pumping out the pressurized fluid from within the inflated parison tube, releasing the mould by decoupling the cavities to obtain an inflated parison tube comprising the blow moulded pipe having the inserts infused within a portion of the wall of the blow moulded pipe, and removing unwanted portions of the inflated parison tube comprising the blow moulded pipe, wherein the step of removing the unwanted portions of the inflated parison tube includes the step of cutting a balloon formed at ends of the inflated parison tube during the step of blow molding and cutting non-essential portions.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
[0032] The present invention will now be described with the help of the accompanying drawing, in which:
[0033] FIG. 1 illustrates a flow chart depicting steps involved in the conventional method for manufacturing a plastic pipe with a metal ring reinforcement fitted at and around ends thereof.
[0034] FIG. 2 illustrates a flow chart depicting steps involved in the method for manufacturing of a blow moulded pipe in accordance with the embodiments of the present invention.
[0035] FIG. 3 illustrates a perspective view of a blow moulded pipe manufactured by the method of the present invention.
[0036] FIG. 4 illustrates a side view of the blow moulded pipe of FIG. 3 without the rubber hose coupled thereto.
[0037] FIG. 5 illustrates a side view of the blow moulded pipe of FIG. 3 with a rubber hose coupled thereto.
[0038] FIG. 6 illustrates a schematic diagram of an inert of the blow moulded pipe manufactured by the method of the present invention, the blow moulded pipe of FIG. 4, or FIG.5 in accordance with the embodiments of the present invention.
DETAILED DESCRIPTION
[0039] All technical terms and scientific expressions used in the present invention have the same meaning as understood by a person skilled in the art to which the present invention belongs, unless and otherwise specified.
[0040] As used in the present specification and the claims, the singular forms “a,” “an” and “the” include plural references unless the context clearly dictates otherwise.
[0041] The term "comprising” as used in the present specification will be understood to mean that the list following is non-exhaustive and may or may not include any other extra suitable things, for instance one or more additional feature(s), part(s), component(s), process step(s), sub-step(s), and /or constituent(s) as applicable.
[0042] Further, the terms “about” and “approximately" used in combination with ranges of sizes of parts, particles, compositions of mixtures, and/or any other physical properties or characteristics, are meant to include small variations that may occur in the upper and/or lower limits of the ranges.
[0043] To overcome one or more disadvantages of the prior art, the present invention provides a suitable alternative method for manufacturing of the plastic pipe using blow moulding process.
[0044] Disclosed is a blow moulded pipe, and a method for manufacturing the blow moulded pipe. The blow moulded pipe of the present invention may be made of a plastic material and may be used for channelling a fluid. For example, the blow moulded pipe may be employed for channelling air or gas therethrough for an air intake system or a turbocharger of an internal combustion engine.
[0045] The present invention is now described with reference to the accompanying drawing, wherein FIG. 2 illustrates a flow chart depicting steps involved in the method for manufacturing of a blow moulded pipe in accordance with the embodiments of the present invention, FIG. 3 illustrates a perspective view of a blow moulded pipe manufactured by the method of the present invention, FIG. 4 illustrates a side view of the blow moulded pipe of FIG. 3 without the rubber hose coupled thereto, FIG. 5 illustrates a side view of the blow moulded pipe of FIG. 3 with a rubber hose coupled thereto, and FIG. 6 illustrates a schematic diagram of an inert of the blow moulded pipe manufactured by the method o the present invention, the blow moulded pipe of FIG. 4, or FIG.5 in accordance with the embodiments of the present invention.
[0046] In accordance with one aspect of the present invention a blow moulded pipe (200) is disclosed. The blow moulded pipe (200) comprising body (200b). The body (200b) may have any shape. In one embodiment, the body (200b) may have a hollow tubular shape. The body (200b) is having an insert (204) extending in an operatively vertically upward direction from an outer surface of the blow moulded pipe (200).
[0047] In accordance with another embodiment of the present invention, a method (1000) for manufacturing the blow moulded pipe (200) is disclosed. The method (1000) comprising the following steps described herein below in detail.
[0048] In step 1, a mould is provided. The mould may include a plurality of cavities (1002). In accordance with one embodiment, the mould may include two cavities which when coupled together form an interior space within the mould. In another embodiment, the mould may include more than two cavities. The mould and the cavities may be made of known materials such as iron or aluminium or steel or a combination thereof.
[0049] In step 2, the mould is maintained at a temperature in the range of 20 ?C to 35 ?C (1004).
[0050] In step 3, a plurality of inserts (202) is disposed within the mould (1006). In one embodiment, the number of inserts can be in the range of 1 to 25. In another embodiment, the number of inserts is four. In yet another embodiment, the number of inserts is six. In another embodiment, the number of inserts is five. In accordance with the embodiments of the present invention, the inserts are placed or positioned at the ends of the mould such that the inserts integrate with the blow moulded pipe being formed, such that the inserts attach to the outer surface of the blow moulded pipe at and around the ends thereof. However, the inserts may be placed at any other positions and the present invention is not limited to fixation of the inserts at the ends of the blow moulded pipe.
[0051] In step 4, once the inserts are placed in required locations within the mould, a parison tube is received within the mould (1008), wherein the parison tube comprising material to be blow moulded at softening or melting temperatures thereof. In one embodiment, the material is plastic.
[0052] In step 5, a stress force is applied to the parison tube (1010), thereby stretching the parison tube to required dimensions within the mould cavity.
[0053] In step 6, a blow pin into the parison tube (1012), wherein the blow pin facilitates blowing of air into the parison tube from a source of the air.
[0054] In step 7, the cavities are cojoined together thereby closing the mould and enclosing the parison tube therein (1014).
[0055] In step 8, a pressurized fluid, which may be air or nitrogen, is blown into the parison tube through the blow pin, thereby inflating the parison tube such that the walls of the parison tube flush against an inner surface of the mould and that of the inserts (202) and that the shape of the inflated parison tube conforms to the shape of the mould and that of the inserts (202), wherein a portion of the wall of the inflated parison tube engages with the inserts (202)(1016).
[0056] In step 9, the pressurized fluid is maintained at the given pressure within the inflated parison tube for a time period (1018).
[0057] In step 10, the pressurized fluid is pumped out from within the inflated parison tube (1020).
[0058] In step 11, the mould is released by decoupling the cavities to obtain an inflated parison tube comprising the blow moulded pipe (200) having the inserts (202) infused within a portion of the wall of the blow moulded pipe (200)(1022).
[0059] In step 12, the unwanted portions of the inflated parison tube comprising the blow moulded pipe (200)(1024) are removed, wherein the step of removing the unwanted portions of the inflated parison tube includes the step of cutting a balloon formed at ends of the inflated parison tube during the step of blow molding and cutting non-essential portions.
[0060] In accordance with one embodiment of the present invention, the blow moulded pipe (200) is made of one material selected from the group consisting of polyethylene, polystyrene, polyvinyl chloride, polypropylene, polyethylene terephthalate, high density polyethylene, low density polyethylene, polyurethane, fiber reinforced plastics, natural fiber reinforced plastic composite, carbon fiber reinforced plastic, and combinations thereof.
[0061] In accordance with one embodiment of the present invention, the temperature of the mould is in the range of 20 ?C to 35 ?C.
[0062] In accordance with one embodiment of the present invention, the temperature of the pressurized fluid is in the range of 20 ?C to 35 ?C.
[0063] In accordance with one embodiment of the present invention, the temperature of the parison is in the range of 120 ?C to 320 ?C.
[0064] In accordance with one embodiment of the present invention, the mould being cooled by a cooling fluid, wherein the temperature of the cooling fluid being in the range of 10 ?C to 20 ?C.
[0065] In accordance with one embodiment of the present invention, the pressure of the pressurized fluid is in the range of 1 bar to 10 bar.
[0066] In accordance with one embodiment of the present invention, the splitable mould comprises two cavities and is splitable longitudinally. In one embodiment, the splitable mould is made of a material selected from the group consisting of metal, alloy, non-metal, and a combination thereof. In one embodiment, the metal is one selected from the group consisting of iron, steel, aluminium, and combinations thereof.
[0067] In accordance with one embodiment of the present invention, the blow moulded pipe is having a diameter in the range of 20 mm to 300 mm, a wall thickness in the range of 1 mm to 10 mm, and an ovality of less than 10 mm.
[0068] In accordance with one embodiment of the present invention the insert (202) extends in an operatively vertically upward direction from an outer surface of the blow moulded pipe (200), and comprises a body (202b), the body (202b) having a base edge (202b1), a first side edge (202b2) extending from one side of the base edge (202b1), a second side edge (202b3) extending from another side of the base edge (202b1), a top edge (202b4) bridging the first side edge (202b2) and the second side edge (202b3), wherein the first and the second side edges being inclined at an angle with respect to a perpendicular to the surface of the blow moulded pipe (200), wherein the angle being in the range of 0? to 45?.
[0069] In accordance with one embodiment of the present invention, the base edge (202b1) having a length in the range of 10 mm to 50 mm, the first side edge (202b2) having a length in the range of 5 mm to 50 mm, the second side edge (202b3) having a length in the range of 5 mm to 50 mm, the top edge (202b4) having a length in the range of 5 mm to 50 mm, wherein the width of the body (202b) is in the range of 1 mm to 5 mm.
[0070] In accordance with one embodiment of the present invention, the body (202b) is made of one material selected from the group consisting of polyethylene, polystyrene, polyvinyl chloride, polypropylene, polyethylene terephthalate, high density polyethylene, low density polyethylene, polyurethane, fiber reinforced plastics, natural fiber reinforced plastic composite, carbon fiber reinforced plastic, metal, metal alloy, and combinations thereof.
[0071] In accordance with one embodiment of the present invention, the pressurized fluid is air, nitrogen, and combinations thereof.
[0072] In accordance with one embodiment of the present invention, the has a temperature in the range of 20 ?C to 35 ?C.
[0073] In accordance with one embodiment of the present invention, the pressurized fluid has a pressure is in the range of 1 bar to 15 bar.
[0074] In accordance with one embodiment of the present invention, the is maintained in the parison for a time period in the range of 1 second to 300 seconds.
[0075] In accordance with one embodiment of the present invention, the blow moulded pipe (200) comprising a body (200b), the body (200b) having a hollow tubular shape with a diameter in the range of 20 mm to 300 mm, a thickness in the range of 1 mm to 10 mm, an insert (202).
[0076] In accordance with one embodiment of the present invention, the number of inserts (202) is in the range of 1 to 25, wherein the inserts (202) are configured to be received in and engage with apertures (402) of a rubber hose (400), the rubber hose (400) having a hollow tubular shape and is received over the end of the blow moulded pipe (200).
TECHNICAL ADVANCES AND ECONOMIC SIGNIFICANCE OF THE PRESENT INVENTION
[0077] The present invention provides various technical advantages and economic significance, wherein the method for manufacturing the blow moulded pipe is simple, economic, and easy to operate.
[0078] Further, the blow moulded pipe and the method of manufacturing thereof of the present invention obviates the need for fitting the metal ring, obviates the step of boring the pipe ends is required, eliminates or reduces bulging of the pipe due to fitment of the metal ring, obviates the pipe cracking, eliminates the cost of fitting the metal ring and time associated with boring and heating the pipe, eliminates peeling off of the powder coating on the metal rings during the fitment process, eliminates the step of boring and boring plastic burr generation, and hence the step of cleaning the plastic burr, reduces the pipe rejection rate and hence increases productivity, reduces time and money loss.

,CLAIMS:We claim:
1. A method (1000) for manufacturing a blow moulded pipe (200), the method characterized by having the following steps:
- providing a mould comprising cavities (1002);
- maintaining the mould at a temperature in the range of 20 ?C to 35 ?C (1004);
- disposing inserts (202) with the mould (1006);
- operatively disposing a parison tube within the mould (1008);
- applying a stress force to the parison tube (1010);
- operatively inserting a blow pin into the parison tube(1012);
- conjoining the cavities thereby closing the mould and enclosing the parison tube therein (1014);
- blowing a pressurized fluid into the parison tube through the blow pin, thereby inflating the parison tube such that the walls of the parison tube flush against an inner surface of the mould and that of the inserts (202) and that the shape of the inflated parison tube conforms to the shape of the mould and that of the inserts (202), wherein a portion of the wall of the inflated parison tube engages with the inserts (202)(1016);
- maintaining the pressurized fluid within the inflated parison tube for a time period (1018);
- pumping out the pressurized fluid from within the inflated parison tube (1020);
- releasing the mould by decoupling the cavities to obtain an inflated parison tube comprising the blow moulded pipe (200) having the inserts (202) infused within a portion of the wall of the blow moulded pipe (200)(1022); and
- removing unwanted portions of the inflated parison tube comprising the blow moulded pipe (200)(1024);
wherein the step of removing the unwanted portions of the inflated parison tube includes the step of cutting a balloon formed at ends of the inflated parison tube during the step of blow molding and cutting non-essential portions.
2. The method as claimed in claim 1, wherein the blow moulded pipe (200) is made of one material selected from the group consisting of polyethylene, polystyrene, polyvinyl chloride, polypropylene, polyethylene terephthalate, high density polyethylene, low density polyethylene, polyurethane, fiber reinforced plastics, natural fiber reinforced plastic composite, carbon fiber reinforced plastic, and combinations thereof.
3. The method as claimed in claim 1, wherein
- the temperature of the mould is in the range of 20 ?C to 35 ?C;
- the temperature of the pressurized fluid is in the range of 20 ?C to 35 ?C;
- the temperature of the parison is in the range of 120 ?C to 320 ?C;
- the mould being cooled by a cooling fluid, wherein the temperature of the cooling fluid being in the range of 10 ?C to 20 ?C; and
- the pressure of the pressurized fluid is in the range of 1 bar to 10 bar.
4. The method as claimed in claim 1, wherein the splitable mould:
- comprises two cavities and is splitable longitudinally;
- is made of a material selected from the group consisting of metal, alloy, non-metal, and a combination thereof; and
- the metal is one selected from the group consisting of iron, steel, aluminium, and combinations thereof;
wherein the blow moulded pipe having:
o a diameter in the range of 20 mm to 300 mm;
o a wall thickness in the range of 1 mm to 10 mm; and
o an ovality of less than 10 mm.
5. The method (100) as claimed in claim 1, wherein the insert (202):
- extending in an operatively vertically upward direction from an outer surface of the blow moulded pipe (200);
- comprising a body (202b), the body (202b) having
o a base edge (202b1);
o a first side edge (202b2) extending from one side of the base edge (202b1);
o a second side edge (202b3) extending from another side of the base edge (202b1);
o a top edge (202b4) bridging the first side edge (202b2) and the second side edge (202b3);
wherein the first and the second side edges being inclined at an angle with respect to a perpendicular to the surface of the blow moulded pipe (200);
wherein the angle being in the range of 0? to 45?;
wherein
o the base edge (202b1) having a length in the range of 10 mm to 50 mm;
o the first side edge (202b2) having a length in the range of 5 mm to 50 mm;
o the second side edge (202b3) having a length in the range of 5 mm to 50 mm;
o the top edge (202b4) having a length in the range of 5 mm to 50 mm;
wherein the width of the body (202b) is in the range of 1 mm to 5 mm.
6. The method (100) as claimed in claim 5, wherein the body (202b) is made of one material selected from the group consisting of polyethylene, polystyrene, polyvinyl chloride, polypropylene, polyethylene terephthalate, high density polyethylene, low density polyethylene, polyurethane, fiber reinforced plastics, natural fiber reinforced plastic composite, carbon fiber reinforced plastic, metal, metal alloy, and combinations thereof.
7. The method as claimed in claim 1, wherein the pressurized fluid:
- is air, nitrogen, and combinations thereof;
- has a temperature in the range of 20 ?C to 35 ?C;
- a pressure is in the range of 1 bar to 15 bar; and
- is maintained in the parison for a time period in the range of 1 second to 300 seconds.
8. The method (100) as claimed in claim 1, wherein the blow moulded pipe (200) comprising:
- a body (200b), the body (200b) having a hollow tubular shape with
o a diameter in the range of 20 mm to 300 mm,
o a thickness in the range of 1 mm to 10 mm;
o an insert (202):
? extending in an operatively vertically upward direction from an outer surface of the blow moulded pipe (200);
? comprising a body (202b), the body (202b) having
• a base edge (202b1);
• a first side edge (202b2) extending from one side of the base edge (202b1);
• a second side edge (202b3) extending from another side of the base edge (202b1);
• a top edge (202b4) bridging the first side edge (202b2) and the second side edge (202b3);
? wherein the first and the second side edges being inclined at an angle with respect to a perpendicular to the surface of the blow moulded pipe (200);
wherein the angle being in the range of 0? to 45?;
wherein
o the base edge (202b1) having a length in the range of 10 mm to 50 mm;
o the first side edge (202b2) having a length in the range of 5 mm to 50 mm;
o the second side edge (202b3) having a length in the range of 5 mm to 50 mm;
o the top edge (202b4) having a length in the range of 5 mm to 50 mm;
o wherein the width of the body (202b) is in the range of 1 mm to 5 mm.
9. The method as claimed in claim 8, wherein the number of inserts (202) is in the range of 1 to 25, wherein the inserts (202) are configured to be received in and engage with apertures (402) of a rubber hose (400), the rubber hose (400) having a hollow tubular shape and is received over the end of the blow moulded pipe (200).
Dated this 11th November 2021
For the Applicant

Deepak Pradeep Thakur
The Applicant’s Patent Agent
IN/PA – 3687
To,
The Controller of Patents
The Patent Office,
At Mumbai