[DESCRIPTION] PRECURSOR PARTICLES OF LITHIUM COMPOSITE TRANSITION METAL OXIDE FOR LITHIUM SECONDARY BATTERY AND CATHODE - ACTIVE MATERIAL INCLUDING THE SAME [TECHNICAL FIELD] The present invention relates to precursor particles of a lithium composite transition metal oxide for lithium secondaiy batteries and a cathode active material including the same and, more particularly, to precursor particles of a lithium composite transition metal oxide for lithium secondary batteries, wherein the precursor particles of a lithium composite transition metal oxide are composite transition metal hydroxide particles including at least two transition metals and having an average diameter- of 1 Urn to 8 (im, wherein the composite transition metal hydroxide particles exhibit monodisperse particle size distribution and have a coefficient of variation of 0.2 to 0.7, and a cathode active material including the same. [BACKGROUND ART] A:s\|mobile:device/technology: continues to develop:and demand;therefor continues, to "increase,: deinand for secondary batteries as energy sources is" rapidlyincreasing. Among these secondary batteries, lithium secondary batteries, which exhibit high energy density and voltage and have long cycle lifespan and low selfdischarge rate, are commercially available and widely used. Among components of lithium secondary batteries, cathode active materials play a critical role in determining battery capacity and performance. As cathode active materials, lithium cobalt oxides (e.g., LiCo02) having relatively excellent physical properties, such as excellent cycle characteristics and the like, are mainly used. However, cobalt used in LiCoCh is a rare metal and supply of cobalt is unstable because reserves and production thereof are limited. In addition, LiCo02 is expensive due to unstable supply of cobalt and increasing demand for lithium secondaiy'batteries. Under these circumstances, research on cathode active materials that can replace LiCo02 is continuously underway and, as representative alternative materials, lithium., composite transition metal oxides including at least two transition metals selected from among nickel (Ni), manganese (Mn), and cobalt (Co) may be used. Such lithium composite transition metal oxides exhibit excellent electrochemical properties through combination of high" capacity of a lithium nickel "oxide (e.g., LiNiO?.)," thermal stability aiid low price of Mn in a lithium manganese oxide (e.g., UMnOj) having a layered structure, and stable electrochemical properties of l,iCo02. However, it is not easy for such lithium composite transition metal oxides to be synthesized by simple solid-phase reaction. Thus, such lithium composite transition metal oxides are prepared by separately preparing a composite transition metal precursor including at least two transition metals selected from among Ni, Mn, and Co by a sol-gel method, a hydrothermal method, spray pyrolysis, co-precipitation, or the like, mixing the composite transition metal precursor with a lithium precursor, and calcining the resulting mixture at high temperature. A composite transition metal precursor is generally prepared by coprecipitation in consideration of cost, productivity, and the like. Conventionally, in a case of preparation of a composite transition metal precursor by co-precipitation, to prepare a lithium composite transition metal oxide as a cathode active material having high discharge capacity, excellent lifespan characteristics, excellent rate characteristics, and the like, preparation of the composite transition metal precursor is performed focusing on optimization of particle shapes such as spherizing or the like. In this regard, structural properties in addition to spherizing of composite transition metal precursors are very important. However, conventional composite transition metal precursor particles prepared by co-precipitation exhibit wide particle size distribution, have non-uniform shape, and contain a large amount of impurities. In addition, conventional composite transition metal precursor particles prepared by co-precipitation have a minimum average diameter of 6 urn to 10 u.m. - [DISCLOSURE] [TECHNICAL PROBLEM] The present invention aims to address the aforementioned problems of the related art and to achieve technical goals that have long been sought. Therefore, the object of the present invention is to provide composite transition metal precursor particles having excellent and uniform size and high ciystallinity when compared to conventional composite transition metal precursors and a lithium transition metal oxide. [TECHNICAL SOLUTION] In accordance with one aspect of the present invention, precursor particles of a " lithium composite transition metal oxide for lithium secondary batteries include composite IransitloTinetal hydroxide particles including at least two transition metals andliaving" an average diameter of 1 um to/8~p7n, wherein tiie composite transition metal hydroxide-particles exhibit monodispcrsc particle size distribution in which a parameter that represents particle siVe distribution is not limited and", when (he particle size distribution is represented as a coefficient of variation, the coefficient of variation is in the range of 0.2 to 0.7; -The coefficient of variation is a value obtained by dividing standard deviation by mass median diameter 050. While conventional composite transition metal hydroxide particles prepared by co-precipitation have a minimum average diameter of 6 urn to 10 um, the composite transition metal hydroxide particles of the present invention may have a minimum average diameter of 1 um to 5 um. In addition, the composite transition metal hydroxide particles according to the present invention exhibit monodisperse particle size distribution as compared to conventional composite transition metal hydroxide particles having a coefficient of variation of 0.2 to 0.7. Thus, the precursor particles of the present invention have smaller monodisperse particle size than conventional transition metal precursor particles and thus movement distance of lithium ions decreases during charge and discharge and, accordingly, rate characteristics are enhanced. In addition, such enhancement effects are more significantly exhibited in terms of low-temperature rate characteristics and, when the precursor particles are added together with existing large precursor particles, electrode packing density"increases". In an exemplary embodiment of the present invention, the precursor particles may have an average diameter of 1 um to 5 um. The composite transition metal hydroxide may be a compound represented by Formula 1 below: M(OH,.x)2- 7 (1) wherein M is at least two selected from the "group consisting of nickel (Ni), cobalt (Co), manganese (Mn), aluminum (Al), copper (Cu), iron (Fe), magnesium (Mg), boron (B), chromium (Cr), and period 2 transition metals; and 0 5 ' Nickel sulfate, cobalt sulfate, and manganese sulfate were mixed in a molar ratio of 0.50:0.20:0.30 to prepare a 1.5 M aqueous transition metal solution, and a 3M aqueous sodium hydroxide solution was prepared. As aqueous ammonia, an aqueous solution in which 25 wt% of ammonium ions are dissolved was prepared. The aqueous transition metal solution was continuously pumped into the 10 reactor using a metering pump so that residence time thereof was 1 hour. The aqueous sodium, hydroxide solution was pumped in a rate-variable manner using a metering pump so that pH thereof was maintained at 11.0. The aqueous ammonia was continuously supplied in an amount of 30 mol% based on the amount of the aqueous transition metal solution. 15 In this regard, average residence time was 1 hour. After reaching the steady state, a nickcl-cobalt-manganese composite transition mclai precursor, which was prepared by 20-hour-continuous reaction, was "washed several times with distilled water and dried in a 120°C constant-temperature drying oven for 24 hours to obtain a final nickcl-cobalt-manganese composite transition metal precursor. -23- _ A nickel-cobalt-manganese composite transition metal precursor was prepared in the same manner as in Example 1,-except that the supply amounts were changed so that the residence time was 2 hours, . . ' . • ' ., A nickel-cobalt-manganese composite transition metal precursor was prepared in the same manner as in Example 1, except that the supply amounts were changed so that the residence time was 3 hours. . . . . . .. A nickel-cobalt-manganese composite transition metal precursor was prepared in the same manner as in Example 1, except that the supply amounts were changed so that the residence time was 6 hours, "'""" A nickel-cobalt-manganese composite transition metal precursor was •'•_- prepared in the same manner as in Example ^except that a continuous stirred tank - reactor (CSTR) was used and the aqueous ammonia was_ supplied in an amount of 50 mol%_bascd on the amount of the aqueous transition metal solution. . " -24- Experimental Example l>-Comparison in productivity per unit reactor volume according to residence time _ _.: Productivities per unit volume of the reactors used in Examples -Lto 4 and Comparative Example 1 were compared. Results are shown in Table 1 below. 5 Example I Example 2 Example 3 Example 4 Comparative Example 1 Residence time 1 hour 2 hours 3 hours 6 hours 6 hours Productivity per volume of reactor (g/L-hr) 55.4 27.7 18.5 9.2 6.1 Experimental Example 2>~ Analysis of amount of impurities 0.01 g of each of the prepared transition metal precursors was accurately weighed and added to a 50 mL Corning tube, a small amount of acid was added .dropwise thereto, andjhe resulting material was mixed by shaking. When the mixed 1 0 sample was fully .dissolved, the concentration of SO,i2" of each sample was measured using an ion chromatograph (DX500 manufactured by Dionex). Results arc shown in Table-2- below. -*-. -25- ^ b j e 2> : : - - • . . :- • • - - , • - j Example 1 Example 'I Example 3 Example 4 Comparative Example 1 Residence time 1 hour 2 hours 3 hours 6 hours 6 hours Concentration of S04^ (wt%) 0.40 0.38 -0.34 0.30 0.45 Experimental Example 3>-Particle size distribution graph FIGS. IA and IB are scanning electron microscope (SEM) images of the transition metal precursors of Example 1 and Comparative Example. 1. FIG. 2 is a graph showing particle size distribution of precursor particles (mass median diameter (D50): 4.07 urn) of Example 1. Table 3 shows D50 and coefficient of variation of each of the precursor particles of Example 1 and the precursor particles of Comparative Example 1. Referring to Table 3, it can be confirmed that the precursor particles of Example 1 have an average, diameter of 5 um or .less and a coefficient of variation of 0.375 (monodispersion),while the_prccursor particles of-Comparative Example -1-havc an average diameter of "greater than 8 um and a coefficient of .variation of 0.706, which indicates poorer monodispersion than the precursor particles of Example 1. -26- . ____ Example 1 Comparative Example 1 Mass median diameter ... :(D5p)_V.v\.L: 4.07 fim 9.46 urn . ,•:•.. C.V. "0.375 0.706 -Manufacture of coin cell and evaluation of electrochemical characteristics thereof Each of the prepared transition metal precursors and Li2C03were mixed in a 5 weight ratio of 1:1 and the resultant mixture was calcined at 920°C for 10 hours at a heating rate of 5°C/min to prepare a powder-type lithium transition metal oxide as a cathode active material. Subsequently, the powder-type cathode active material, Denka as a conductive material, and KF 1100 as a binder were mixed in a weight ratio of 95:2.5:2.5 to prepare a slurry and the slurry was uniformly coated on 20 urn 10 thick AI foil. Thereafter, the coated Al foil was dried at 130°C, thereby completing manufacture of a cathode for lithium secondary batteries. The fabricated cathode, a lithium metal foil as a counter electrode (an anode), and a polyethylene film as a separator (Cclgard, thickness: 20 urn), and a liquid electrolyte containing 1M LiPF6 dissolved in a mixed solvent of ethylene carbonate, "J 5 djmcthylene carbonate, and diethyl carbonate in a volume ratio of 1:2:1 weie used to _ -manufacture a 2032 coin cell, •:"' -27- Electrical properties of the cathode active materia! of each coin cell were : : evaluated at 3.0 to 4.25 V using an electrochemical analyzer (Toscat 3100U available ""•''•'from"Toyb Systems). Results'are shown in Table "4 below. " Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Initial discharge capacity (mAh/g) 168.3 167.3 166.9 166.8 165.2 Initial efficiency (%) 89.8 89.1 89.4 89.6 87.6 2C/0.IC (%) 88.5 87.9 87.8 87.0 85.2 5 FIG. 4 is a side view of a reactor 100 according to an embodiment of the present invention. FIG. 5 is a view illustrating ring-shaped vortex pairs generated in a rotating reaction space of the reactor of FIG.4 and a flow shape of a reaction fluid. FIG. 6 is a view of a reactor 100 according to another embodiment of the present -— invention. -- — - - --- - - 10 "" Referring to FIG.-4, the reactor 100 for preparation of a precursor of a lithium " composite transition metal oxide for lithium secondary batteries includes a hollow fixed cylinder 110 installed horizontally wilh respect to the ground, a rotating -28- cylinder 120 disposed in the hollow fixed cylinder HO, having the same rotating shaft as that of the fixed cylinder 110, and having an outer diameter (2xr2) smaller than an inner "diameter {2xrI)~bf the fixed cylindeFl 10" "a" rotating reaction Tpace formed between the fixed cylinder 110 arid the rotating "cylinder 120, a plurality of . 5 inlets 140, 141 and 142 through which a reaction fluid is introduced into the rotating reaction space and an outlet 150 to discharge the reaction fluid, wherein the inlets 140, 141 and 142 and the outlet 150 are disposed on the fixed cylinder 110, and an electric motor 130 provided at a side surface of the fixed cylinder 110 to generate power for rotation of the rotating cylinder 120.. 10 An effective volume of the rotating reaction space is determined by a ratio (d/r2) of a distance d between the fixed cylinder 110 and the rotating cylinder 120 to an outer radius r2 of the rotating cylinder 120. Referring to FIGS. 4 and 5, when the rotating cylinder 120 is rotated by power generated by the electric motor 130 and thus reaches a critical Reynolds 15 number, reaction fluids such as an aqueous solution of a composite transition metal hydroxide, aqueous ammonia, an aqueous sodium hydroxide solution, and thejike J ! ! 1™^^ into the rotating reaction space via the inlets "140,-141 and 142 become unstable by centrifugal force applied towards the fixed cylinder] 10 "from the rotating cylinder 120 and, as a _rcsult, ring-shaped vortex pairs 160 rotating_in_opposile 20 directions along a rotating shaft arc periodically arranged in the rotating reaction -29- space. The length of the ring-shaped vortex pairs 160 in the direction of gravity is almost the same as the distance d between the fixed cylinder 110 and the rotating cylinder 120. The outside of the rotating shaft may be sealed by a sealing member such as an O-ring to prevent air from being sucked into a gap between the rotating shaft and a bearing when the rotating cylinder 120 is rotated. Referring to FIGS. 4 and 6, an aqueous transition metal salt solution, aqueous ammonia, an aqueous sodium hydroxide solution, and the like may be introduced into the rotating reaction space via the inlet 140 and heterogeneous materials such as a coating material may be introduced into the rotating reaction space via the inlet 141 orl42. Referring to FIG. 6, the reactor 100 according to another embodiment of the present invention further includes storage tanks 180 and 181 to store an aqueous transition metal salt solution, aqueous ammonia, an aqueous sodium hydroxide solution, "and the like and a metering pump 170 to control the amounts of reaction fluids introduced into"lh"e rotating reaction space. - -"- _ The aqueous Jrai^silionTiietaTsait solution may be introduced into the rotating" " reaction space using the metering pump 170 in consideration of residence time, the -30- aqueous sodium hydroxide solution may be introduced into the rotating reaction space in a rate-variable manner using the metering pump 170 so that pH thereof was kept constant, and the "aqueous"ammonia may "be" continuously supplied using" the metering pump 170,r "'•";-.—-••••••••-•----— 5 After reaction was completed, the prepared composite transition metal hydroxide was obtained via the outlet 150. To adjust reaction temperature in a process of mixing the reaction fluids in the rotating reaction space between the fixed cylinder 110 and the rotating cylinder 120 using the vortex pairs 160, the reactor 100 may further include a heat exchanger on 10 the fixed cylinder 110. The heat exchanger may be any heat exchanger that is commonly known in the art to which the present invention pertains. FIG. 7 is a graph showing comparison in power consumption per unit mass between a CSTR and the reactor according to the present invention, A 4L CSTR operates at a rotational speed of 1200 to 1500 rpm to form a desired particle size 15 when synthesizing a precursor and, when the rotational speed is converted into stirring power per unit mass, the corresponding^value is about-13 to 27 W/kg (see " __ _" region A of FIG. 7). Byxontrast. a 0.5 L rca'clor'according tothe pre^cnTTnvention enables synthesis of a precursor with a desired particle size at a rotational speed of - 600 rpm to 1400 rpm and, when the rotational speed is converted into stirring power -31- per unit mass, the corresponding value is 1 W/kg to 8 W/kg (see region B of FIG. 7). _ That is, the reactor according to the present invention enables synthesis of a precursor with a desired particle size using less stirring power per unit mass than the- CSTR. This indicates that the reactor has higher stirring efficiency than that of the •- CSTR. : r" - ' " - " ' .:. ..._.' _ Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, witliout departing from the scope and spirit of the invention as disclosed in the accompanying claims. [INDUSTRIAL APPLICABILITY] . As described above, composite transition metal hydroxide particles according to the present invention have a small average diameter, exliibit monodisperse particle size distribution, and are uniform and thus exhibit excellent rate characteristics, excellent low-temperature rate characteristics, and excellent electrode density. In addition, the composite transition metal hydroxide "particleshaveThigh" cryslallinity and .thus have. increasedTreacfivity"fJv\'ith a "lithium precursor and, ~ accordingly, a calcination temperature of a lithium composite transition metal oxide - may be reduced. [CLAIMS] _ JClahn 1] Pi-ecursor_particles of a lithium composite transition metal oxide for "lithium secondary batteries, wherein the precursor particles are composite transition metal hydroxide particles comprising at least two transition metals and having an average diameter of 1 urn to 8 um, wherein the composite transition metal hydroxide particles exhibit monodisperse particle size distribution and have a coefficient of variation of 0.2 to 0.7. [Claim 2] The precursor particles according to claim I, wherein the average diameter of the composite transition metal hydroxide particles is 1 um to 5 urn. [Claim 31 The precursor particles according to claim 1, wherein the composite transition metal hydroxide particles contain an impurity derived from a transition metal salt for preparation of a composite transition metal hydroxide, wherein an amount of the impurity is 0.4 wt% or less based on a total weight of the composite transition metal hydroxide particles. [Claim 4] The precursor particles according to claim 3, wherein the amount of the impurity is 0,3 wt^joJR wt% based on the;total weight of the "composite transition ; metal hydroxide particles. • [Claim 5] The precursor particles according to claim 3, whereinjhe .impurity is a salt ion comprising a sulfate ion (S04 2"). [Claim 6] The precursor particles according to claim 3, wherein the transition - metal salt is a sulfate. [Claim 7] The precursor particles according to claim 6, wherein the'sulfate is at least one selected from the group consisting of nickel sulfate, cobalt sulfate, and manganese sulfate. [Claim 8] The precursor particles according to claim 3, wherein the salt ion comprises a nitrate ion (NO3"). [Claim 9] The precursor particles according to claim 1, wherein the composite transition metal hydroxide is a compound represented by Formula 1 below: M(OH!.x)2 (1) wherein M is at least two selected from the group consisting of nickel (Ni), cobalt (Co), manganese (Mn), aluminum (Al), copper (Cu), iron (Fe); magnesium (Mg), boron (IJ), chromium (Cr), and period 2 transition metals; and 0

Documents

Orders

Section	Controller	Decision Date

Application Documents

#	Name	Date
1	4326-DELNP-2014-RELEVANT DOCUMENTS [21-08-2023(online)].pdf	2023-08-21
1	POWER OF AUTHORITY.pdf	2014-05-29
2	4326-DELNP-2014-ASSIGNMENT WITH VERIFIED COPY [14-11-2022(online)].pdf	2022-11-14
2	PCT-IB-304.pdf	2014-05-29
3	FORM 5.pdf	2014-05-29
3	4326-DELNP-2014-FORM-16 [14-11-2022(online)].pdf	2022-11-14
4	FORM 3.pdf	2014-05-29
4	4326-DELNP-2014-POWER OF AUTHORITY [14-11-2022(online)].pdf	2022-11-14
5	FORM 2 + SPECIFICATION.pdf	2014-05-29
5	4326-DELNP-2014-RELEVANT DOCUMENTS [15-09-2022(online)].pdf	2022-09-15
6	DRAWING.pdf	2014-05-29
6	4326-DELNP-2014-Correspondence-040320.pdf	2021-10-17
7	4326-DELNP-2014-Power of Attorney-040320.pdf	2021-10-17
7	4326-delnp-2014-Correspondence-Others-(12-08-2014).pdf	2014-08-12
8	4326-DELNP-2014-RELEVANT DOCUMENTS [29-09-2021(online)].pdf	2021-09-29
8	4326-DELNP-2014-FER.pdf	2018-10-22
9	4326-DELNP-2014-FER_SER_REPLY [07-12-2018(online)].pdf	2018-12-07
9	4326-DELNP-2014-RELEVANT DOCUMENTS [27-09-2021(online)].pdf	2021-09-27
10	4326-DELNP-2014-OTHERS [16-04-2019(online)].pdf	2019-04-16
10	4326-DELNP-2014-Response to office action [01-06-2020(online)].pdf	2020-06-01
11	4326-DELNP-2014-FER_SER_REPLY [16-04-2019(online)].pdf	2019-04-16
11	4326-DELNP-2014-IntimationOfGrant20-03-2020.pdf	2020-03-20
12	4326-DELNP-2014-DRAWING [16-04-2019(online)].pdf	2019-04-16
12	4326-DELNP-2014-PatentCertificate20-03-2020.pdf	2020-03-20
13	4326-DELNP-2014-CORRESPONDENCE [16-04-2019(online)].pdf	2019-04-16
13	4326-DELNP-2014-Written submissions and relevant documents [19-03-2020(online)].pdf	2020-03-19
14	4326-DELNP-2014-CLAIMS [16-04-2019(online)].pdf	2019-04-16
14	4326-DELNP-2014-Correspondence to notify the Controller [03-03-2020(online)].pdf	2020-03-03
15	4326-DELNP-2014-ABSTRACT [16-04-2019(online)].pdf	2019-04-16
15	4326-DELNP-2014-FORM-26 [03-03-2020(online)].pdf	2020-03-03
16	4326-DELNP-2014-HearingNoticeLetter-(DateOfHearing-04-03-2020).pdf	2020-01-29
16	4326-DELNP-2014-PETITION UNDER RULE 137 [18-04-2019(online)].pdf	2019-04-18
17	4326-DELNP-2014-OTHERS [18-04-2019(online)].pdf	2019-04-18
17	4326-DELNP-2014-Correspondence-180419.pdf	2019-04-25
18	4326-DELNP-2014-FER_SER_REPLY [18-04-2019(online)].pdf	2019-04-18
18	4326-DELNP-2014-Power of Attorney-180419.pdf	2019-04-25
19	4326-DELNP-2014-CORRESPONDENCE [18-04-2019(online)].pdf	2019-04-18
20	4326-DELNP-2014-FER_SER_REPLY [18-04-2019(online)].pdf	2019-04-18
20	4326-DELNP-2014-Power of Attorney-180419.pdf	2019-04-25
21	4326-DELNP-2014-Correspondence-180419.pdf	2019-04-25
21	4326-DELNP-2014-OTHERS [18-04-2019(online)].pdf	2019-04-18
22	4326-DELNP-2014-HearingNoticeLetter-(DateOfHearing-04-03-2020).pdf	2020-01-29
22	4326-DELNP-2014-PETITION UNDER RULE 137 [18-04-2019(online)].pdf	2019-04-18
23	4326-DELNP-2014-ABSTRACT [16-04-2019(online)].pdf	2019-04-16
23	4326-DELNP-2014-FORM-26 [03-03-2020(online)].pdf	2020-03-03
24	4326-DELNP-2014-Correspondence to notify the Controller [03-03-2020(online)].pdf	2020-03-03
24	4326-DELNP-2014-CLAIMS [16-04-2019(online)].pdf	2019-04-16
25	4326-DELNP-2014-Written submissions and relevant documents [19-03-2020(online)].pdf	2020-03-19
25	4326-DELNP-2014-CORRESPONDENCE [16-04-2019(online)].pdf	2019-04-16
26	4326-DELNP-2014-DRAWING [16-04-2019(online)].pdf	2019-04-16
26	4326-DELNP-2014-PatentCertificate20-03-2020.pdf	2020-03-20
27	4326-DELNP-2014-FER_SER_REPLY [16-04-2019(online)].pdf	2019-04-16
27	4326-DELNP-2014-IntimationOfGrant20-03-2020.pdf	2020-03-20
28	4326-DELNP-2014-OTHERS [16-04-2019(online)].pdf	2019-04-16
28	4326-DELNP-2014-Response to office action [01-06-2020(online)].pdf	2020-06-01
29	4326-DELNP-2014-FER_SER_REPLY [07-12-2018(online)].pdf	2018-12-07
29	4326-DELNP-2014-RELEVANT DOCUMENTS [27-09-2021(online)].pdf	2021-09-27
30	4326-DELNP-2014-FER.pdf	2018-10-22
30	4326-DELNP-2014-RELEVANT DOCUMENTS [29-09-2021(online)].pdf	2021-09-29
31	4326-DELNP-2014-Power of Attorney-040320.pdf	2021-10-17
31	4326-delnp-2014-Correspondence-Others-(12-08-2014).pdf	2014-08-12
32	DRAWING.pdf	2014-05-29
32	4326-DELNP-2014-Correspondence-040320.pdf	2021-10-17
33	FORM 2 + SPECIFICATION.pdf	2014-05-29
33	4326-DELNP-2014-RELEVANT DOCUMENTS [15-09-2022(online)].pdf	2022-09-15
34	FORM 3.pdf	2014-05-29
34	4326-DELNP-2014-POWER OF AUTHORITY [14-11-2022(online)].pdf	2022-11-14
35	FORM 5.pdf	2014-05-29
35	4326-DELNP-2014-FORM-16 [14-11-2022(online)].pdf	2022-11-14
36	PCT-IB-304.pdf	2014-05-29
36	4326-DELNP-2014-ASSIGNMENT WITH VERIFIED COPY [14-11-2022(online)].pdf	2022-11-14
37	4326-DELNP-2014-RELEVANT DOCUMENTS [21-08-2023(online)].pdf	2023-08-21
37	POWER OF AUTHORITY.pdf	2014-05-29

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