Prosecution Insights
Last updated: October 02, 2026
Application No. 18/277,709

NANOCARBON MATERIAL DISPERSION COMPOSITION

Non-Final OA §103
Filed
Aug 17, 2023
Priority
Feb 18, 2021 — JP 2021-024006 +1 more
Examiner
CHU, YONG LIANG
Art Unit
1731
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Daicel Corporation
OA Round
3 (Non-Final)
75%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
78%
With Interview

Examiner Intelligence

Grants 75% — above average
75%
Career Allowance Rate
1086 granted / 1449 resolved
+9.9% vs TC avg
Minimal +3% lift
Without
With
+3.1%
Interview Lift
resolved cases with interview
Typical timeline
2y 4m
Avg Prosecution
56 currently pending
Career history
1482
Total Applications
across all art units

Statute-Specific Performance

§101
1.8%
-38.2% vs TC avg
§103
35.0%
-5.0% vs TC avg
§102
20.7%
-19.3% vs TC avg
§112
29.8%
-10.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1449 resolved cases

Office Action

§103
DETAILED ACTION The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Claims 1, 4, 8, and 10 have been amended. Claims 3, 9, 13, and 16 are cancelled. Claims 1-2, 4-8, 10-12, 14-15, and 17-18 are pending, and are under examination on the merits. Information Disclosure Statements Applicants’ Information Disclosure Statement, filed on 02/12/2026, has been considered. Please refer to Applicant’s copy of the PTO-1449 submitted herewith. Response to Amendment The Amendment by Applicants’ representative Eugene T. Perez on 05/01/2026 has been entered. Response to Arguments/Amendments Claim rejection under 35 U.S.C.§102(a)(1) Applicant’s amendment to claim 1 by further limiting “ wherein the nanocarbon material comprises a surface-modified nanocarbon material in which a surface of the nanocarbon material is modified by a group represented by Formula (I) below: -X-R (I) where in Formula (I), X represents an amino group, an ether bond, an ester bond, a phosphinic acid group, a phosphonic acid group, a phosphoric acid ester, a sulfide bond, a carbonyl group, an amide group, an imide bond, a thiocarbonyl group, a siloxane bond, a sulfuric acid ester group, a sulfonyl group, a sulfone group, a sulfoxide, or a group in which two or more of those listed above are bonded, and a bond extending left from X binds to the nanocarbon material; R represents a monovalent organic group, and an atom that binds to X is a carbon atom” overcomes the rejection. The rejection is hereby withdrawn. Claim rejection under 35 U.S.C.§103(a) Applicant’s amendments and arguments have been fully considered, but not sufficient to overcome the rejection. Applicant’s argument is on the ground that Fujimura (“Fujimura -278 publication”) discloses that diamond microparticles have a core-shell structure consisting of an SP3 diamond core and an SP2 graphite shell, and that the shell structure (graphite) has aqueous functional groups, such as -COOH and -OH (para. [0002]). Furthermore, at paragraph [0038], Fujimura discloses: "if the oxidation treatment is carried out excessively, most of the graphite carbon in the shell portion of the diamond fine particles is removed, and conversely, the amount of functional groups such as carboxyl groups, sulfonic acid groups, and hydroxyl groups decreases." From these disclosures, it is evident that, in the diamond nanoparticles disclosed in Fujimura, the -COOH and -OH groups that can serve as a scaffold for surface modification are located in the graphite carbon that constitutes the shell portion. In other words, it is clear that, in the invention disclosed in Fujimura, the target of surface modification of the diamond microparticles is the graphite carbon on the surface covering the core diamond particles. Furthermore, Fujimura does not describe or suggest modifying the surface of the diamond microparticles with surface modification groups containing organic groups. On the other hand, the surface modification groups disclosed in Komatsu modify nanodiamond particles (i.e., the core portion of the diamond microparticles in Fujimura), and Komatsu has absolutely no disclosure regarding the surface-modified nanodiamond particles having a graphite carbon shell structure. In other words, there is no mention or suggestion that the surface modification groups disclosed in Komatsu could be used on the shell portion (graphite carbon) of a carbon raw material having a graphene structure. Therefore, in Fujimura, which makes no mention or suggestion of modifying nanodiamond particles (the core portion of the diamond microparticles in Fujimura), there is no motivation to modify the core portion of the diamond microparticles and to select the surface modification groups disclosed in Komatsu to modify the nanodiamond particles (core portion). In addition, Applicant argues that the present invention achieves superior and unexpected results over the prior art. Specifically, it has been demonstrated that the dispersion medium of the present invention exhibits excellent dispersibility not only in polar organic solvents, such as water and methanol, but also in non-polar organic solvents such as toluene (see Table 1, Examples 1 and 2). Applicant’s arguments are found not persuasive. Amended claim 1 is drawn to a nanocarbon material dispersion composition comprising a dispersion medium and a nanocarbon material dispersed at nano-scale in the dispersion medium, the nanocarbon material comprising a nanodiamond particle and a graphene layer formed on a surface of the nanodiamond particle, wherein the nanocarbon material comprises a surface-modified nanocarbon material in which a surface of the nanocarbon material is modified by a group represented by Formula (I) -X-R. Claim 1 defines a surface of the nanocarbon material is modified by a group represented by Formula (I) -X-R, wherein the nanocarbon material comprising a nanodiamond particle and a graphene layer formed on a surface of the nanodiamond particle. Therefore, a graphene layer formed on a surface of the nanodiamond particle is considered to be part of the nanocarbon material. Fujimura -278 publication teaches diamond microparticles have a core-shell structure consisting of an SP3 diamond core and an SP2 graphite shell, and that the shell structure (graphite) has aqueous functional groups, such as -COOH and -OH (para. [0002]), wherein the functional group -COOH reads on the Formula (I) -X-R, wherein X is carbonyl group (-CO), and R is a monovalent organic group (-OH); or X is an ester bond (-COO-), and R is a monovalent organic group (-H); and the atom binds to X is an either nanocarbon or graphene (i.e., a carbon atom). In addition, a surface of the nanocarbon material is modified by a group represented by Formula (I) -X-R is further taught and/or suggested by the `926 publication-Komatsu. In terms of Applicant’s argument that the present invention achieves superior and unexpected results of excellent dispersibility not only in polar organic solvents, such as water and methanol, but also in non-polar organic solvents such as toluene, the `278 publication [0001, English translation] discloses a method for producing a graphite-covered diamond microparticles having excellent water dispersibility, an aqueous dispersion of diamond microparticles with excellent water dispersibility obtained by heat treatment under an inert gas atmosphere. Therefore, achieving excellent dispersibility not only in polar organic solvents, such as water and methanol, but also in non-polar organic solvents such as toluene should not be considered as unexpected results. Therefore, the rejection is maintained and revised necessitated by the amendment as following. The following rejections are necessitated by the amendment filed 05/01/2026: Claim Rejections - 35 USC § 103 (revised) In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102 of this title, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. The factual inquiries set forth in Graham v. John Deere Co., 383 U.S. 1, 148 USPQ 459 (1966), that are applied for establishing a background for determining obviousness under 35 U.S.C. 103 are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. Claims 1-2, 4-8, 10-12, 14-15, and 17-18 are rejected under 35 U.S.C. 103 as being unpatentable over JP2015113278A (“the `278 publication”) to Fujimura et al. in view of US2010/261926 (“the `926 publication”) to Komatsu et al., Popov et al., Nanoscale Research Letters, (2017), v.12, p.561 (1-6). Applicant’s claim 1 is drawn to a nanocarbon material dispersion composition comprising a dispersion medium and a nanocarbon material dispersed at nano-scale in the dispersion medium, the nanocarbon material comprising a nanodiamond particle and a graphene layer formed on a surface of the nanodiamond particle, wherein the nanocarbon material has a wavenumber, which corresponds to a peak-top value in a wavenumber range of 1580+50 cm-1 in a Raman spectrum, from 1585 cm-1 to 1630 cm-1; and the nanocarbon material has a peak that appears at 2θ = 43 to 44° in an XRD analysis, wherein the nanocarbon material comprises a surface-modified nanocarbon material in which a surface of the nanocarbon material is modified by a group represented by Formula (I) below: -X-R(I) where in Formula (I), X represents an amino group, an ether bond, an ester bond, a phosphinic acid group, a phosphonic acid group, a phosphoric acid ester, a sulfide bond, a carbonyl group, an amide group, an imide bond, a thiocarbonyl group, a siloxane bond, a sulfuric acid ester group, a sulfonyl group, a sulfone group, a sulfoxide, or a group in which two or more of those listed above are bonded, and a bond extending left from X binds to the nanocarbon material; R represents a monovalent organic group, and an atom that binds to X is a carbon atom. The `278 publication [0001, English translation] discloses a method for producing diamond microparticles having excellent water dispersibility, an aqueous dispersion of diamond microparticles with excellent water dispersibility obtained by heat treatment under an inert gas atmosphere, and an aqueous dispersion of diamond microparticles (i.e., a nanocarbon material dispersion composition comprising a dispersion medium and a nanocarbon material dispersed at nano-scale in the dispersion medium) obtained by the method thereof. The `278 publication [0002] discloses the diamond microparticles, particularly those produced by the explosion method, have a core-shell structure consisting of a SP3 diamond core and a SP2 graphite shell, and the shell structure has aqueous functional groups such as -COOH and -OH. In the low concentration range of 1 to 2 wt.% of the diamond microparticles, they are relatively dispersible in water, but in the high concentration range of 3 to 10 wt.% they do not disperse uniformly in water and precipitate, which causes a problem when used in the processing of high-concentration aqueous dispersion. In order to prepare diamond microparticles having excellent high-concentration water dispersibility, the `278 publication [0004] discloses diamond microparticles having excellent high-concentration water dispersibility can be produced by heat treating diamond microparticles in an inert gas atmosphere at a temperature in the range of 700-900°C with high hardness, abrasion resistance, high thermal conductivity, high refractive index, etc. In addition, the `278 publication [0041] discloses a polishing slurry using a diamond microparticle water dispersion with good dispersity, excellent polishing efficiency and productivity can be uniformly applied to the surface of fibers or films with diamond particles having little aggregation such that it is possible to produce fibers or films with excellent hardness and abrasion resistance. In terms of the claimed limitation “wherein the nanocarbon material has a wavenumber, which corresponds to a peak-top value in a wavenumber range of 1580 ± 50 cm-1 in a Raman spectrum, from 1585 cm-1 to 1630 cm-1 ”, the present specification [0020 and 0022] describes the nanocarbon material preferably shows peaks in the G-band (generally in the range from 1550 to 1650 cm-1 in a Raman spectrum, and the presence of such peaks means that a graphene structure or a structure similar to a graphene structure is present, that a structure derived from a defect in a graphene structure or a structure similar to a structure derived from a defect in a graphene structure is present, and that a functional group is included; and when the wavenumber corresponding to the peak-top value is within the range from 1585 cm-1 to 1630 cm-1, the nanocarbon material has good dispersibility in the dispersion medium. This limitation of a peak-top value in a wavenumber range of 1580 ± 50 cm-1 in a Raman spectrum, from 1585 cm-1 to 1630 cm-1 is further known and further described in Popov et al., see Figs. 3-4, 5a, and 8). In terms of the claimed limitation “the nanocarbon material has a peak that appears at 2θ = 43 to 44° in an XRD analysis”, the specification [0026] describes the presence of the peak (at 2θ = 43 to 44° in an XRD analysis) means that the nanocarbon material has a diamond structure, which is also described in the `278 publication. Furthermore, since the aqueous dispersion of the heat-treated diamond microparticles disclosed in the `278 publication comprising a core-shell structure consisting of a SP3 diamond core and a SP2 graphite shell with excellent high-concentration water dispersibility, and prepared by the same method involving explosion method, and following heat method at a temperature in the range of 700-900°C, the two limitations of Raman spectrum and XRD peak are inherited properties of the aqueous diamond microparticles dispersion composition, wherein the dispersion medium is water. In terms of the limitation “wherein the nanocarbon material comprises a surface-modified nanocarbon material in which a surface of the nanocarbon material is modified by a group represented by Formula (I) below: -X-R(I) where in Formula (I), X represents an amino group, an ether bond, an ester bond, a phosphinic acid group, a phosphonic acid group, a phosphoric acid ester, a sulfide bond, a carbonyl group, an amide group, an imide bond, a thiocarbonyl group, a siloxane bond, a sulfuric acid ester group, a sulfonyl group, a sulfone group, a sulfoxide, or a group in which two or more of those listed above are bonded, and a bond extending left from X binds to the nanocarbon material; R represents a monovalent organic group, and an atom that binds to X is a carbon atom”, the `278 publication teaches diamond microparticles have a core-shell structure consisting of an SP3 diamond core and an SP2 graphite shell, and that the shell structure (graphite) has aqueous functional groups, such as -COOH and -OH (para. [0002]), wherein the functional group -COOH reads on the Formula (I) -X-R, wherein X is carbonyl group (-CO), and R is a monovalent organic group (-OH); or X is an ether bond (-COO-), and R is a monovalent organic group (-H). In addition, a surface of the nanocarbon material is modified by a group represented by Formula (I) below: -X-R is further taught and/or suggested by the `926 publication. Specifically, the `926 publication (claims 1-3) teaches a surface-modified nanodiamond comprising a base nanodiamond and at least one polyglycerol-chain-containing group present on at least a surface portion of the base nanodiamond, the polyglycerol-chain-containing group represented by following Formula (1) -X-R wherein X represents one member selected from the group consisting of single bond, -NH-, -O-, -COO-, -PH(=O)O-, and -S-; and R represents a polyglyceryl group. In addition, the `926 publication [0014] teaches the surface-modified nanodiamond has significantly improved solubility or dispersibility and dispersion stability in water and/or polar organic solvents, can thereby be handled with remarkably improved handleability, and can be used in various uses as a stable solution or dispersion in water or a polar organic solvent or can be subjected to any of chemical reactions and physical reactions in water and/or a polar organic solvent. This gives a nanodiamond material that is usable in engineering applications such as materials for polishing agents and dressers adopted to CMP (Chemical Mechanical Polishing); plating materials for corrosion-resistant electrodes adopted to fuel cells; materials for forming very hard surface coating layers typically of cutting tools; and highly heat-resistant and highly thermally conductive materials. One ordinary skilled in the art would have been motivated to further modify the nanocarbon material disclosed by the `278 publication with the modification group of the `926 publication (claims 1-3) through the method disclosed by the `926 publication (claims 4-6 and Example 1). Therefore, the `278 publication in view of Popov et al. and the `926 publication would have rendered claims 1, and 3-5 obvious. In terms of claim 2, wherein the nanocarbon material has an average dispersed particle size (D50) of 100 nm or less that is obtained by a dynamic light scattering method, the `278 publication [0050] discloses the BD (diamond microparticle product) produced in Example 1 was crushed using zirconia to obtain BD with a median diameter of 50 nm. This BD had a medium diameter of 50 nm and specific gravity of 2.55 g/cm3. In terms of claim 6, wherein the dispersion medium comprises water, an aliphatic hydrocarbon, an aromatic hydrocarbon, an alicyclic hydrocarbon, an alcohol, an ether, an ester, an ionic liquid, or a lubricant base, the `278 publication [0001] discloses a method for producing diamond microparticles having excellent water dispersibility, an aqueous dispersion of diamond microparticles with excellent water dispersibility obtained by heat treatment under an inert gas atmosphere, and an aqueous dispersion of diamond microparticles. Wherein the dispersion medium comprises water. In terms of claim 7, the `278 publication [0001, English translation] discloses a method for producing diamond microparticles having excellent water dispersibility, an aqueous dispersion of diamond microparticles with excellent water dispersibility obtained by heat treatment under an inert gas atmosphere, and an aqueous dispersion of diamond microparticles (i.e., a nanocarbon material dispersion composition comprising a dispersion medium and a nanocarbon material dispersed at nano-scale in the dispersion medium) obtained by the method thereof. The `278 publication [0002] discloses the diamond microparticles, particularly those produced by the explosion method, have a core-shell structure consisting of a SP3 diamond core and a SP2 graphite shell, and the shell structure has aqueous functional groups such as -COOH and -OH. In the low concentration range of 1 to 2 wt.% of the diamond microparticles, they are relatively dispersible in water, but in the high concentration range of 3 to 10 wt.% they do not disperse uniformly in water and precipitate, which causes a problem when used in the processing of high-concentration aqueous dispersion. In order to prepare diamond microparticles having excellent high-concentration water dispersibility, the `278 publication [0004] discloses diamond microparticles having excellent high-concentration water dispersibility can be produced by heat treating diamond microparticles in an inert gas atmosphere at a temperature in the range of 700-900°C with high hardness, abrasion resistance, high thermal conductivity, high refractive index, etc. In addition, the `278 publication [0041] discloses a polishing slurry using a diamond microparticle water dispersion with good dispersity, excellent polishing efficiency and productivity can be uniformly applied to the surface of fibers or films with diamond particles having little aggregation such that it is possible to produce fibers or films with excellent hardness and abrasion resistance. The difference is the `278 publication does not teach a nanocarbon material comprises a surface-modified nanocarbon material in which a surface of the nanocarbon material is modified by a group represented by Formula (I) -X-R, wherein X represents an amino group, an ether bond, an ester bond, a phosphinic acid group, a phosphonic acid group, a phosphoric acid ester, a sulfide bond, a carbonyl group, an amide group, an imide bond, a thiocarbonyl group, a siloxane bond, a sulfuric acid ester group, a sulfonyl group, a sulfone group, a sulfoxide, or a group in which two or more of those listed above are bonded, and a bond extending left from X binds to the nanocarbon material, R represents a monovalent organic group, and an atom that binds to X is a carbon atom. Instead, the `278 publication [0002] teaches the diamond microparticles, particularly those produced by the explosion method, have a core-shell structure consisting of a SP3 diamond core and a SP2 graphite shell, and the shell structure has aqueous functional groups such as -COOH and -OH. However, the difference is further taught and/or suggested by the `926 publication. The `926 publication (claims 1-3) teaches a surface-modified nanodiamond comprising a base nanodiamond and at least one polyglycerol-chain-containing group present on at least a surface portion of the base nanodiamond, the polyglycerol-chain-containing group represented by following Formula (1) -X-R wherein X represents one member selected from the group consisting of single bond, -NH-, -O-, -COO-, -PH(=O)O-, and -S-; and R represents a polyglyceryl group. In addition, the `926 publication [0014] teaches the surface-modified nanodiamond has significantly improved solubility or dispersibility and dispersion stability in water and/or polar organic solvents, can thereby be handled with remarkably improved handleability, and can be used in various uses as a stable solution or dispersion in water or a polar organic solvent or can be subjected to any of chemical reactions and physical reactions in water and/or a polar organic solvent. This gives a nanodiamond material that is usable in engineering applications such as materials for polishing agents and dressers adopted to CMP (Chemical Mechanical Polishing); plating materials for corrosion-resistant electrodes adopted to fuel cells; materials for forming very hard surface coating layers typically of cutting tools; and highly heat-resistant and highly thermally conductive materials. One ordinary skilled in the art would have been motivated to further modify the nanocarbon material disclosed by the `278 publication with the modification group of the `926 publication (claims 1-3) through the method disclosed by the `926 publication (claims 4-6 and Example 1). Therefore, the `278 publication in view of the `926 publication would have rendered claim 7 obvious. In terms of claim 8, the `278 publication [0041] discloses a polishing slurry using a diamond microparticle water dispersion with good dispersity, excellent polishing efficiency and productivity can be uniformly applied to the surface of fibers or films with diamond particles having little aggregation such that it is possible to produce fibers or films with excellent hardness and abrasion resistance, wherein the base material is fibers or films, and the coating film is the aqueous dispersion of the heat-treated diamond microparticles disclosed in the `278 publication In terms of claims 10-11, the difference is the `278 publication does not teach a nanocarbon material comprises a surface-modified nanocarbon material in which a surface of the nanocarbon material is modified by a group represented by Formula (I) -X-R, wherein X represents an amino group, an ether bond, an ester bond, a phosphinic acid group, a phosphonic acid group, a phosphoric acid ester, a sulfide bond, a carbonyl group, an amide group, an imide bond, a thiocarbonyl group, a siloxane bond, a sulfuric acid ester group, a sulfonyl group, a sulfone group, a sulfoxide, or a group in which two or more of those listed above are bonded, and a bond extending left from X binds to the nanocarbon material, R represents a monovalent organic group, and an atom that binds to X is a carbon atom. Instead, the `278 publication [0002] teaches the diamond microparticles, particularly those produced by the explosion method, have a core-shell structure consisting of a SP3 diamond core and a SP2 graphite shell, and the shell structure has aqueous functional groups such as -COOH and -OH. However, the difference is further taught and/or suggested by the `926 publication. The `926 publication (claims 1-3) teaches a surface-modified nanodiamond comprising a base nanodiamond and at least one polyglycerol-chain-containing group present on at least a surface portion of the base nanodiamond, the polyglycerol-chain-containing group represented by following Formula (1) -X-R wherein X represents one member selected from the group consisting of single bond, -NH-, -O-, -COO-, -PH(=O)O-, and -S-; and R represents a polyglyceryl group. In addition, the `926 publication [0014] teaches the surface-modified nanodiamond has significantly improved solubility or dispersibility and dispersion stability in water and/or polar organic solvents, can thereby be handled with remarkably improved handleability, and can be used in various uses as a stable solution or dispersion in water or a polar organic solvent or can be subjected to any of chemical reactions and physical reactions in water and/or a polar organic solvent. This gives a nanodiamond material that is usable in engineering applications such as materials for polishing agents and dressers adopted to CMP (Chemical Mechanical Polishing); plating materials for corrosion-resistant electrodes adopted to fuel cells; materials for forming very hard surface coating layers typically of cutting tools; and highly heat-resistant and highly thermally conductive materials. One ordinary skilled in the art would have been motivated to further modify the nanocarbon material disclosed by the `278 publication with the modification group of the `926 publication (claims 1-3) through the method disclosed by the `926 publication (claims 4-6 and Example 1). Therefore, the `278 publication in view of the `926 publication would have rendered claims 10-11 obvious. In terms of claim 12, wherein the dispersion medium comprises water, an aliphatic hydrocarbon, an aromatic hydrocarbon, an alicyclic hydrocarbon, an alcohol, an ether, an ester, an ionic liquid, or a lubricant base, the `278 publication [0001] discloses a method for producing diamond microparticles having excellent water dispersibility, an aqueous dispersion of diamond microparticles with excellent water dispersibility obtained by heat treatment under an inert gas atmosphere, and an aqueous dispersion of diamond microparticles, wherein the dispersion medium comprises water. In terms of claims 14-15 and 17-18, the difference is the `278 publication does not teach a nanocarbon material comprises a surface-modified nanocarbon material in which a surface of the nanocarbon material is modified by a group represented by Formula (I) -X-R, wherein X represents an amino group, an ether bond, an ester bond, a phosphinic acid group, a phosphonic acid group, a phosphoric acid ester, a sulfide bond, a carbonyl group, an amide group, an imide bond, a thiocarbonyl group, a siloxane bond, a sulfuric acid ester group, a sulfonyl group, a sulfone group, a sulfoxide, or a group in which two or more of those listed above are bonded, and a bond extending left from X binds to the nanocarbon material, R represents a monovalent organic group, and an atom that binds to X is a carbon atom. Instead, the `278 publication [0002] teaches the diamond microparticles, particularly those produced by the explosion method, have a core-shell structure consisting of a SP3 diamond core and a SP2 graphite shell, and the shell structure has aqueous functional groups such as -COOH and -OH. However, the difference is further taught and/or suggested by the `926 publication. The `926 publication (claims 1-3) teaches a surface-modified nanodiamond comprising a base nanodiamond and at least one polyglycerol-chain-containing group present on at least a surface portion of the base nanodiamond, the polyglycerol-chain-containing group represented by following Formula (1) -X-R wherein X represents one member selected from the group consisting of single bond, -NH-, -O-, -COO-, -PH(=O)O-, and -S-; and R represents a polyglyceryl group. In addition, the `926 publication [0014] teaches the surface-modified nanodiamond has significantly improved solubility or dispersibility and dispersion stability in water and/or polar organic solvents, can thereby be handled with remarkably improved handleability, and can be used in various uses as a stable solution or dispersion in water or a polar organic solvent or can be subjected to any of chemical reactions and physical reactions in water and/or a polar organic solvent. This gives a nanodiamond material that is usable in engineering applications such as materials for polishing agents and dressers adopted to CMP (Chemical Mechanical Polishing); plating materials for corrosion-resistant electrodes adopted to fuel cells; materials for forming very hard surface coating layers typically of cutting tools; and highly heat-resistant and highly thermally conductive materials. One ordinary skilled in the art would have been motivated to further modify the nanocarbon material disclosed by the `278 publication with the modification group of the `926 publication (claims 1-3) through the method disclosed by the `926 publication (claims 4-6 and Example 1). Therefore, the `278 publication in view of the `926 publication would have rendered claims 14-15 and 17-18 obvious. Conclusions Claims 1-2, 4-8, 10-12, 14-15, and 17-18 are rejected. Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any extension fee pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the date of this final action. Telephone Inquiry Any inquiry concerning this communication or earlier communications from the examiner should be directed to Yong L. Chu, whose telephone number is (571)272-5759. The examiner can normally be reached on M-F 8:30am-5:00pm. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Amber R. Orlando can be reached on 571-270-3149. The fax phone number for the organization where this application or proceeding is assigned is (571) 273-8300. Status Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). /YONG L CHU/Primary Examiner, Art Unit 1731
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Prosecution Timeline

Aug 17, 2023
Application Filed
Feb 02, 2026
Non-Final Rejection mailed — §103
Apr 30, 2026
Response Filed
May 01, 2026
Response Filed
May 19, 2026
Final Rejection mailed — §103
Aug 17, 2026
Request for Continued Examination
Aug 21, 2026
Response after Non-Final Action
Sep 29, 2026
Non-Final Rejection mailed — §103 (current)

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Prosecution Projections

3-4
Expected OA Rounds
75%
Grant Probability
78%
With Interview (+3.1%)
2y 4m (~0m remaining)
Median Time to Grant
High
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