Description:FIELD

The present disclosure relates to a fertilizer composition and a process for its preparation.
BACKGROUND
The background information herein below relates to the present disclosure but is not necessarily prior art.
Plant nutrients such as nitrogen (N), phosphorus (P), potassium (K), magnesium (Mg), and the like are applied to crops to provide optimum growth and yield to the plants. The plant nutrient compositions are generally available either in solid form or in liquid form. Calcium nitrate is widely used as a plant nutrient as it provides nitrogen which is a primary nutrient of the plant.
Solid fertilizer compositions are not readily absorbed in the soil. Rather, the solid fertilizer compositions need to be dissolved in water for better absorption by the plants. Further, the solid fertilizer compositions are not suitable for modern drip irrigation systems.
The commercially available liquid fertilizer compositions predominantly comprise nitrogen, phosphorous, potash, iron, manganese, zinc, copper, and boron as macronutrients. These liquid fertilizer compositions contain calcium, magnesium, and sulphur in minute quantities. Hence, these commercially available liquid fertilizer compositions fail to provide the optimum nutrition required for plant growth.
A well-known formulation for solutions for the plant is Hoagland's solution where a first solution includes potassium nitrate, calcium nitrate, monopotassium phosphate, magnesium sulfate, an iron chelate, and a second solution is a micronutrient stock solution that includes boric acid, manganese chloride, zinc sulfate, copper sulfate, and molybdic acid. To apply Hoagland's solution, requires the two-solution or two-container approach, in order to provide a complete nutrient feed. The user must mix two separate concentrates and dilute each in a user solution to avoid precipitation. From a commercial distribution perspective, one may have to ship sufficient water along with the concentrate, which increases handling costs and thus makes an expensive fertilizer.
Therefore, there is a felt a need to provide a fertilizer composition and a process of preparation thereof that mitigates the aforestated drawbacks or at least provide an alternative solution.
OBJECTS
Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows.
An object of the present disclosure to ameliorate one or more problems of the background or to at least provide a useful alternative.
Another object of the present disclosure is to provide a fertilizer composition.
Yet another object of the present disclosure is to provide a fertilizer composition in the form of suspension that is easy for handling, transportation, and has enhanced shelf life.
Still another object of the present disclosure is to provide a process for the preparation of fertilizer composition.
Still another object of the present disclosure is to provide a process for the preparation of the fertilizer composition that is simple, cost-effective, and environment friendly.
Other objects and advantages of the present disclosure will be more apparent from the following description, which is not intended to limit the scope of the present disclosure.

SUMMARY
The present disclosure relates to a fertilizer composition and a process for its preparation.
In an aspect, the fertilizer composition comprises calcium nitrate in an amount in the range of 40 wt% to 45 wt% with respect to the total weight of the composition; magnesium nitrate in an amount in the range of 7 wt% to 15 wt% with respect to the total weight of the composition; and at least one suspending agent in the range of 0.5 wt% to 2 wt% with respect to the total weight of the composition; and q.s water.
In another aspect, the process for the preparation of a fertilizer composition comprises mixing a predetermined amount of calcium carbonate and a predetermined amount of magnesium oxide in a predetermined amount of water to obtain a mixture. A predetermined amount of nitric acid is slowly added to the mixture under stirring at a first predetermined temperature for a first predetermined time period to obtain a slurry. To the slurry, a predetermined amount of base is added to neutralize the slurry to obtain a neutralized slurry. Water in the neutralized slurry is evaporated at a second predetermined temperature till the density of the neutralized slurry is in the range of 1.61 g/cm3 to 1.64 g/cm3 to obtain a resultant slurry. To the resultant slurry, a predetermined amount of a suspending agent is mixed under stirring for a second predetermined time period to obtain the fertilizer composition.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
The present disclosure will now be described with the help of the accompanying drawing, in which:
Figure 1 illustrates a graphical representation of the yield of chilli crop; and
Figure 2 illustrates a graphical representation of the length of the chilli.
DETAILED DESCRIPTION
Embodiments, of the present disclosure, will now be described with reference to the accompanying drawing.
Embodiments are provided so as to thoroughly and fully convey the scope of the present disclosure to the person skilled in the art. Numerous details, are set forth, relating to specific components, and methods, to provide a complete understanding of embodiments of the present disclosure. It will be apparent to the person skilled in the art that the details provided in the embodiments should not be construed to limit the scope of the present disclosure. In some embodiments, well-known processes, well-known apparatus structures, and well-known techniques are not described in detail.
The terminology used, in the present disclosure, is only for the purpose of explaining a particular embodiment and such terminology shall not be considered to limit the scope of the present disclosure. As used in the present disclosure, the forms "a,” "an," and "the" may be intended to include the plural forms as well, unless the context clearly suggests otherwise. The terms "comprises," "comprising," “including,” and “having,” are open ended transitional phrases and therefore specify the presence of stated features, integers, steps, operations, elements, modules, units and/or components, but do not forbid the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The particular order of steps disclosed in the method and process of the present disclosure is not to be construed as necessarily requiring their performance as described or illustrated. It is also to be understood that additional or alternative steps may be employed.
As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed elements.
The terms first, second, third, etc., should not be construed to limit the scope of the present disclosure as the aforementioned terms may be only used to distinguish one element, component, region, layer or section from another component, region, layer or section. Terms such as first, second, third etc., when used herein do not imply a specific sequence or order unless clearly suggested by the present disclosure.
Plant nutrients such as nitrogen (N), phosphorus (P), potassium (K) magnesium (Mg), and the like are applied to crops to provide optimum growth and yield to the plants. The plant nutrient compositions are generally available either in solid form or in liquid form. Calcium nitrate is widely used as a plant nutrient as it provides nitrogen which is a primary nutrient of plant
Solid fertilizer compositions are not readily absorbed in the soil. Further, the solid fertilizer compositions are not suitable for modern drip irrigation systems.
The commercially available liquid fertilizer compositions predominantly comprise nitrogen, phosphorous, potash, iron, manganese, zinc, copper, and boron as macronutrients. These liquid fertilizer compositions contain calcium, magnesium, and sulphur in minute quantities. Hence, these commercially available liquid fertilizer compositions fail to provide the optimum nutrition required for plant growth.
A well-known formulation for solutions for the plant is Hoagland's solution where a first solution includes potassium nitrate, calcium nitrate, monopotassium phosphate, magnesium sulfate, an iron chelate, and a second solution is a micronutrient stock solution that includes boric acid, manganese chloride, zinc sulfate, copper sulfate, and molybdic acid. To apply Hoagland's solution, this two-solution or two-container approach requires that, in order to provide a complete nutrient feed, one must mix two separate concentrates and dilute each in a user solution to avoid precipitation. From a commercial distribution perspective, one may have to ship sufficient water along with the concentrate in that the water increases handling costs and is an expensive fertilizer.

The present disclosure provides a fertilizer composition and process for its preparation. The fertilizer composition of the present disclosure delivers a higher concentration of Calcium, Nitrogen, and Magnesium to the plants.
In an aspect of the present disclosure, there is provided a fertilizer composition.
The fertilizer composition comprises calcium nitrate in an amount in the range of 40 wt% to 45 wt% with respect to the total weight of the composition; magnesium nitrate in an amount in the range of 7 wt% to 15 wt% with respect to the total weight of the composition; at least one suspending agent in an amount in the range of 0.5 wt% to 2 wt% with respect to the total weight of the composition; and q.s. water.
In accordance with an embodiment of the present disclosure, the suspending agent is at least one selected from the group consisting of xanthan gum, xanthan gum gel, carboxymethyl cellulose, guar gum, agar-agar, starch, Tersperse 2700 and unflavored gelatin. In an exemplary embodiment, the suspending agent is xanthan gum gel. In another exemplary embodiment, the suspending agent is starch. In yet another exemplary embodiment, the suspending agent is Tersperse 2700 (an acid resin copolymer).
In accordance with an embodiment of the present disclosure, the density of the fertilizer composition is in the range of 1.52 g/cm3 to 1.54 g/cm3. In an exemplary embodiment, the density of the fertilizer composition is 1.53 g/cm3. In another exemplary embodiment, the density of the fertilizer composition is 1.52 g/cm3.
In an embodiment, the density of the fertilizer composition is critical in maintaining the stability of the suspension. The specific density of the fertilizer composition is achieved when each of the components in the composition is present in the specified range. If the density is lower than the specified range, then the elemental analysis of the fertilizer composition shows a lower concentration of desired elements. If the density is higher than the specified range, then solid material sediments from the slurry and the suspension form of the fertilizer cannot be achieved. The reaction being a stoichiometric reaction, the proportion of ingredients is very critical, any variation in the proportion of the reactants, the reaction will not be complete and lead to an unstable composition.
In accordance with an embodiment of the present disclosure, the fertilizer composition is in the form selected from suspension and dispersion.
In accordance with an embodiment of the present disclosure, the fertilizer composition is characterized by having water soluble calcium in the range of 12 wt% to 18 wt%, magnesium in the range of 1 wt% to 3 wt% and nitrogen in the range of 8 wt% to 12 wt%.
In another aspect of the present disclosure, there is provided a process for the preparation of the fertilizer composition.
The process is described in detail
In the first step, a predetermined amount of calcium carbonate and a predetermined amount of magnesium oxide are mixed in a predetermined amount of water to obtain a mixture.
In accordance with an embodiment of the present disclosure, the predetermined amount of calcium carbonate is in the range of 40 wt% to 60 wt% with respect to the total weight of the mixture. In an exemplary embodiment, the predetermined amount of calcium carbonate is 47 wt% with respect to the total weight of the mixture. In another exemplary embodiment, the predetermined amount of calcium carbonate is 46.5 wt% with respect to the total weight of the mixture.
In accordance with an embodiment of the present disclosure, the predetermined amount of magnesium oxide is in the range of 1 wt% to 5 wt% with respect to the total weight of the mixture. In an exemplary embodiment, the predetermined amount of magnesium oxide is 3 wt% with respect to the total weight of the mixture. In another exemplary embodiment, the predetermined amount of magnesium oxide is 3.5 wt% with respect to the total weight of the mixture.
In accordance with an embodiment of the present disclosure, the predetermined amount of water is in the range of 40 wt% to 60 wt% with respect to the total weight of the mixture. In an exemplary embodiment, the predetermined amount of water is 50 wt% with respect to the total weight of the mixture.
In a second step, a predetermined amount of nitric acid is slowly added under stirring to the mixture at a first predetermined temperature for a first predetermined time period to obtain a slurry.
In an embodiment of the present disclosure, the nitric acid is a spent nitric acid.
In accordance with an embodiment of the present disclosure, a weight ratio of nitric acid to calcium carbonate is in the range of 1:0.41 to 1:0.45. In an exemplary embodiment, the ratio of nitric acid to calcium carbonate is 1:0.43. In another exemplary embodiment, the ratio of nitric acid to calcium carbonate is 1:0.42.
In accordance with an embodiment of the present disclosure, the first predetermined temperature is in the range of 40°C to 100°C. In an exemplary embodiment, the first predetermined temperature is 80°C.
In accordance with an embodiment of the present disclosure, the first predetermined time period is in the range of 20 minutes to 120 minutes. In an exemplary embodiment, the first predetermined time period is 30 minutes.
In a third step, the slurry is neutralized by using a predetermined amount of at least one base to obtain a neutralized slurry.
In accordance with an embodiment of the present disclosure, the base is selected from the group consisting of ammonia and ammonium hydroxide. In an exemplary embodiment, the base is ammonium hydroxide.
In accordance with an embodiment of the present disclosure, the weight ratio of the slurry to the base is in the range of 1:0.035 to 1:0.075. In an exemplary embodiment, the weight ratio of the base to the slurry is 1:0.061. In another exemplary embodiment, the weight ratio of the base to the slurry is 1:0.045.
In an embodiment, the so obtained slurry is neutralized by adding ammonium hydroxide to obtain a neutralized slurry having a pH in the range of 7.0 to 7.3. In an exemplary embodiment, the pH of the neutralized slurry is 7.1. In another exemplary embodiment, the pH of the neutralized slurry is 7.2.
In a fourth step, the neutralized slurry is heated to evaporate water at a second predetermined temperature till the density of the neutralized slurry is in the range of 1.61 g/cm3 to 1.64 g/cm3 to obtain a resultant slurry.
In accordance with an embodiment of the present disclosure, the second predetermined temperature is in the range of 85°C to 120°C. In an exemplary embodiment of the present disclosure, the second predetermined temperature is 105°C.
In an exemplary embodiment, the density of the resultant slurry is 1.625 g/cm3. In another exemplary embodiment, the density of the resultant slurry is 1.63 g/cm3.
In the final step, a predetermined amount of suspending agent is mixed with the resultant slurry under stirring for a second predetermined time period to obtain the fertilizer composition.
In accordance with an embodiment of the present disclosure, the suspending agent is at least one selected from the group consisting of xanthan gum gel, carboxymethyl cellulose guar gum, agar-agar, starch, Tersperse 2700 and unflavored gelatin. In an exemplary embodiment, the suspending agent is xanthan gum gel. In another exemplary embodiment, the suspending agent is starch. In yet another exemplary embodiment, the suspending agent is Tersperse 2700.
In accordance with an embodiment of the present disclosure, the weight ratio of the resultant slurry to the suspending agent is in the range of 1:0.05 to 1:0.15. In an exemplary embodiment, the weight ratio of the resultant slurry to the suspending agent is 1:0.11.
In accordance with an embodiment of the present disclosure, the second predetermined time period is in the range of 20 minutes to 40 minutes. In an exemplary embodiment, the second predetermined time period is 30 minutes.
The fertilizer composition of the present disclosure is in suspension form which makes it easy for handling and transportation. The fertilizer composition of the present disclosure when applied to the plants, increased yield and growth is observed.
The foregoing description of the embodiments has been provided for purposes of illustration and not intended to limit the scope of the present disclosure. Individual components of a particular embodiment are generally not limited to that particular embodiment, but, are interchangeable. Such variations are not to be regarded as a departure from the present disclosure, and all such modifications are considered to be within the scope of the present disclosure.
The present disclosure is further described in light of the following experiments, which are set forth for illustration purpose only and not to be construed for limiting the scope of the disclosure. The following experiments can be scaled up to industrial/commercial scale, and the results obtained can be extrapolated to industrial scale.
EXPERIMENTAL DETAILS
Experiment 1: Preparation of the fertilizer composition in accordance with the present disclosure.
31 kg of calcium carbonate (94% pure) and 2 kg of magnesium oxide (95 % pure) were mixed in 33 kg of water under stirring to obtain a mixture. To the mixture, 72 kg of nitric acid (60% strength) was slowly added under stirring at 80°C for 30 minutes to obtain a slurry (121 kg). The so obtained slurry was neutralized by adding 7.5 kg of ammonium hydroxide (24% strength) to obtain a neutralized slurry having a pH of 7.1. The neutralized slurry was heated at 105°C to evaporate the water, till the density of the neutralized slurry reaches to 1.625 g/cm3 to obtain a resultant slurry (90 kg). To the resultant slurry, 10 kg of 1% xanthan gum gel was added under stirring for 30 minutes to obtain the fertilizer composition.
The fertilizer composition of the present disclosure was subjected to elemental analysis and the results obtained are provided in Table 1.
Table -1: Elemental analysis of the fertilizer composition
Parameter Result
Total Nitrogen (%w/w) 10.21
Water Soluble Calcium (%w/w) 15.18
Magnesium as Mg (%w/w) 2.59
pH (1% solution) @ RT 8.20
Density @ RT (gm/cm3) 1.531

Experiment 2: Preparation of the fertilizer composition in accordance with the present disclosure.
600 g of calcium carbonate (94% pure) and 45 g of magnesium oxide (95 % pure) were mixed in 645 g of water under stirring to obtain a mixture. To the mixture, 1440 g of nitric acid (60% strength) was slowly added under stirring at 80°C for 30 minutes to obtain a slurry (2430 g). The so obtained slurry was neutralized by adding 110 g of ammonium hydroxide (24% strength) to obtain a neutralized slurry having a pH of 7.2. The neutralized slurry was heated at 105°C to evaporate the water, till the density of the neutralized slurry reaches to 1.63 g/cm3 to obtain a resultant slurry (1800 gm). To the resultant slurry, 200 gm of 1% xanthan gum gel was added under stirring for 30 minutes to obtain the fertilizer composition.
The fertilizer composition of the present disclosure was subjected to elemental analysis and the results obtained are provided in Table 2.
Table -2: Elemental analysis of the fertilizer composition
Parameter Result
Total Nitrogen (%w/w) 10.18
Water Soluble Calcium (%w/w) 15.61
Magnesium as Mg (%w/w) 2.27
pH (1% solution) @ RT 8.90
Density @ RT (gm/ cc) 1.533

Experiment 3 - 6: Preparation of the fertilizer composition in accordance with the present disclosure.
The fertilizer composition was prepared similar to the process disclosed in Experiment 1, by varying the Calcium carbonate, Magnesium oxide, Nitric acid, Ammonium hydroxide, and suspending agent the results are provided below in Table-3.
Table – 3
Experiment No. Composition Elemental Analysis
Calcium carbonate (g) Magnesium oxide (g) Nitric acid (g) Ammonium hydroxide (g) Suspending agent (g) Total Nitrogen (%w/w) Water Soluble Calcium (%w/w) Magnesium as Mg (%w/w) pH (1% solution) @ RT Density @ RT (gm/cm3)
3 45 3 115 7.5 1.5
(Tersperse 2700) 10.47 15.75 2.6 8.99 1.521
4 600 40 1360 100 20
(Starch) 11.24 16.05 2.14 8.9 1.5214
5 300 10 720 75 100
(Xanthan gum gel) 10.56 16.03 2.74 7.9 1.5315
6 162.5 5 360 35 5
(Xanthan gum gel) 10.27 15.52 2.87 8.7 1.5338

COMPARATIVE EXAMPLE
Experiment 7: Evaluation of composition comprising calcium nitrate solution.
The fertilizer composition of the present disclosure obtained in experiment 1 (0.75 ml) and a solution of calcium nitrate (prepared by mixing 0.61 g of Sardar brand calcium nitrate solid granules in 1000 ml of water) were applied to chilli crop on plots having an area of 12 m2 each. The concentrations of the two products are so chosen to provide equal amount of calcium as per standard requirement for the chilli crop. Similar amount of fertilizer composition and calcium nitrate solutions were applied on 40 and 80 DATP (days after transplantation). After 90 days, the yield and growth of the chilli plant were evaluated, which shows enhanced yield per plot was obtained when the fertilizer composition of the present disclosure was applied. The results are provided below in Table 4 and illustrated in Figure 1 and Figure 2.
Figure 1 and Figure 2 indicates the yield of chilli crop and length (growth) of chilli for the specified plot size (i.e. 12 square meter).
Table 4 - Comparative data of fertilizer composition of the present disclosure and calcium nitrate solution.
Parameters Fertilizer composition of the present disclosure (Experiment 1) Calcium nitrate solution (Sardar brand calcium nitrate solid granules)
Yield (kg) 2.68 2.21
Growth (cm) 7.36 7.141
It is evident from the above table that the fertilizer composition of the present disclosure provides enhanced yield and growth as compared to the use of the calcium nitrate solution.
TECHNICAL ADVANCEMENTS
The present disclosure described herein has several technical advantages including, but not limited to, the realization of a fertilizer composition that is:
- is easy for handling and transportation;
- is effective for the growth of plants;
- has a higher concentration of Ca, N, and Mg; and
- contains magnesium in the suspension form that is readily available for the plant;
and a process for preparing a fertilizer composition is
- simple and efficient; and
- does not require a drying crystallization step.
Throughout this specification, the word “comprise”, or variations such as “comprises” or “comprising”, will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.
The use of the expression “at least” or “at least one” suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the disclosure to achieve one or more of the desired objects or results.
Any discussion of documents, acts, materials, devices, articles or the like that has been included in this specification is solely for the purpose of providing a context for the disclosure. It is not to be taken as an admission that any or all of these matters form a part of the prior art base or were common general knowledge in the field relevant to the disclosure as it existed anywhere before the priority date of this application.
The numerical values mentioned for the various physical parameters, dimensions or quantities are only approximations, and it is envisaged that the values higher/lower than the numerical values assigned to the parameters, dimensions or quantities fall within the scope of the disclosure, unless there is a statement in the specification specific to the contrary.
While considerable emphasis has been placed herein on the components and component parts of the preferred embodiments, it will be appreciated that many embodiments can be made and that many changes can be made in the preferred embodiments without departing from the principles of the disclosure. These and other changes in the preferred embodiment as well as other embodiments of the disclosure will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation. , Claims:WE CLAIM

1. A fertilizer composition comprising:
a. calcium nitrate in an amount in the range of 40 wt% to 45 wt% with respect to the total weight of the composition;
b. magnesium nitrate in an amount in the range of 7 wt% to 15 wt% with respect to the total weight of the composition;
c. at least one suspending agent in an amount in the range of 0.5 wt% to 2 wt% with respect to the total weight of the composition; and
d. q.s. water.
2. The fertilizer composition as claimed in claim 1, wherein said suspending agent is at least one selected from the group consisting of xanthan gum, xanthan gum gel, carboxymethyl cellulose, guar gum, agar-agar, starch, Tersperse 2700, and unflavored gelatin.
3. The fertilizer composition as claimed in claim 1, wherein said composition has a density in the range of 1.52 g/cm3 to 1.54 g/cm3.
4. The fertilizer composition as claimed in claim 1, is characterized by having water soluble calcium in the range of 12 wt% to 18 wt%, magnesium in the range of 1 wt% to 3 wt% and nitrogen in the range of 8 wt% to 12 wt%.
5. The fertilizer composition as claimed in claim 1, wherein said composition is in the form selected from suspension and dispersion.
6. A process for the preparation of a fertilizer composition, wherein said process comprising the following steps:
a. mixing a predetermined amount of calcium carbonate and a predetermined amount of magnesium oxide in a predetermined amount of water to obtain a mixture;
b. adding slowly a predetermined amount of nitric acid to said mixture under stirring at a first predetermined temperature for a first predetermined time period to obtain a slurry;
c. neutralizing said slurry by using a predetermined amount of base to obtain a neutralized slurry;
d. evaporating water from said neutralized slurry at a second predetermined temperature till the density is in the range of 1.61 g/cm3 to 1.64 g/cm3 to obtain a resultant slurry; and
e. mixing a predetermined amount of a suspending agent to said resultant slurry under stirring for a second predetermined time period to obtain the fertilizer composition.
7. The process as claimed in claim 6, wherein said predetermined amount of calcium carbonate is in the range of 40 wt% to 60 wt% with respect to the total weight of the mixture.
8. The process as claimed in claim 6, wherein said predetermined amount of magnesium oxide is in the range of 1 wt% to 5 wt% with respect to the total weight of the mixture.
9. The process as claimed in claim 6, wherein said predetermined amount of water is in the range of 40 wt% to 60 wt% with respect to the total weight of the mixture.
10. The process as claimed in claim 6, wherein said nitric acid is a spent nitric acid.
11. The process as claimed in claim 6, wherein a weight ratio of nitric acid to calcium carbonate is in the range of 1:0.41 to 1:0.45.
12. The process as claimed in claim 6, wherein said first predetermined temperature is in the range of 40°C to 100°C.
13. The process as claimed in claim 6, wherein said first predetermined time period in the range of 20 minutes to 120 minutes.
14. The process as claimed in claim 6, wherein a weight ratio of said slurry to said base is in the range of 1:0.035 to 1:0.075.
15. The process as claimed in claim 6, wherein said base is selected from the group consisting of ammonia and ammonium hydroxide.
16. The process as claimed in claims 6, wherein said second predetermined temperature is in the range of 85°C to 120°C.
17. The process as claimed in claim 6, wherein said suspending agent is at least one selected from the group consisting of xanthan gum, xanthan gum gel, carboxymethyl cellulose, guar gum, agar-agar, starch, Tersperse 2700, and unflavored gelatin.
18. The process as claimed in claim 6, wherein a weight ratio of said resultant slurry to said suspending agent is in the range of 1:0.05 to 1:0.15.
19. The process as claimed in claim 6, wherein said second predetermined time period is in the range of 20 minutes to 40 minutes.

Dated this 16th day of December, 2022

_______________________________
MOHAN RAJKUMAR DEWAN, IN/PA – 25
of R.K.DEWAN & CO.
Authorized Agent of Applicant

TO,
THE CONTROLLER OF PATENTS
THE PATENT OFFICE, AT MUMBAI