Prosecution Insights
Last updated: April 19, 2026
Application No. 18/267,604

LOWER SURFACE AREA CARBON BLACK AND ELASTOMERIC COMPOSITIONS COMPRISING SAME

Non-Final OA §103§DP
Filed
Jun 15, 2023
Examiner
BUTCHER, ROBERT T
Art Unit
1764
Tech Center
1700 — Chemical & Materials Engineering
Assignee
BIRLA CARBON U.S.A., INC.
OA Round
1 (Non-Final)
71%
Grant Probability
Favorable
1-2
OA Rounds
2y 8m
To Grant
89%
With Interview

Examiner Intelligence

Grants 71% — above average
71%
Career Allow Rate
665 granted / 941 resolved
+5.7% vs TC avg
Strong +18% interview lift
Without
With
+18.4%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
65 currently pending
Career history
1006
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
49.4%
+9.4% vs TC avg
§102
12.0%
-28.0% vs TC avg
§112
23.7%
-16.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 941 resolved cases

Office Action

§103 §DP
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 . This application is a national stage entry under 35 U.S.C. §371 of International Application No. PCT/US21/64039 filed 12/17/2021. Acknowledgment is made of Provisional application No. 63/127,100, filed on Dec. 17, 2020, provisional application No. 63/270,333, filed on Oct. 21, 2021. Claims 1, 9, 12, 20, 22, 26-27, 31-39 are pending. Election/Restriction REQUIREMENT FOR UNITY OF INVENTION As provided in 37 CFR 1.475(a), a national stage application shall relate to one invention only or to a group of inventions so linked as to form a single general inventive concept (“requirement of unity of invention”). Where a group of inventions is claimed in a national stage application, the requirement of unity of invention shall be fulfilled only when there is a technical relationship among those inventions involving one or more of the same or corresponding special technical features. The expression “special technical features” shall mean those technical features that define a contribution which each of the claimed inventions, considered as a whole, makes over the prior art. The determination whether a group of inventions is so linked as to form a single general inventive concept shall be made without regard to whether the inventions are claimed in separate claims or as alternatives within a single claim. See 37 CFR 1.475(e). When Claims Are Directed to Multiple Categories of Inventions: As provided in 37 CFR 1.475 (b), a national stage application containing claims to different categories of invention will be considered to have unity of invention if the claims are drawn only to one of the following combinations of categories: (1) A product and a process specially adapted for the manufacture of said product; or (2) A product and a process of use of said product; or (3) A product, a process specially adapted for the manufacture of the said product, and a use of the said product; or (4) A process and an apparatus or means specifically designed for carrying out the said process; or (5) A product, a process specially adapted for the manufacture of the said product, and an apparatus or means specifically designed for carrying out the said process. Otherwise, unity of invention might not be present. See 37 CFR 1.475 (c). Restriction is required under 35 U.S.C. 121 and 372. This application contains the following inventions or groups of inventions which are not so linked as to form a single general inventive concept under PCT Rule 13.1. In accordance with 37 CFR 1.499, applicant is required, in reply to this action, to elect a single invention to which the claims must be restricted. Group I, claim(s) 1, 9 drawn to a carbon black. Group II, claim(s) 12, 20, 22, 26-27, 31-38, drawn to an elastomer composition. Group II, claim(s) 39, drawn to a method of making an elastomer composition. The groups of inventions listed above do not relate to a single general inventive concept under PCT Rule 13.1 because, under PCT Rule 13.2, they lack the same or corresponding special technical features for the following reasons: Groups I, II, and III lack unity of invention because even though the inventions of these groups require the technical feature of the carbon black of claim 1, this technical feature is not a special technical feature as it does not make a contribution over the prior art in view of Westenberg et al. (US 2023/0348728) as discussed in the rejection under 35 USC 103(a) below. During a telephone conversation with Clinton South on 1/13/2025 a provisional election was made to prosecute the invention of Group II, claims 12, 20, 22, 26-27, 31-38. Affirmation of this election must be made by applicant in replying to this Office action. Claims 1, 9, 39 are withdrawn from further consideration by the examiner, 37 CFR 1.142(b), as being drawn to a non-elected invention. Applicant is reminded that upon the cancelation of claims to a non-elected invention, the inventorship must be corrected in compliance with 37 CFR 1.48(a) if one or more of the currently named inventors is no longer an inventor of at least one claim remaining in the application. A request to correct inventorship under 37 CFR 1.48(a) must be accompanied by an application data sheet in accordance with 37 CFR 1.76 that identifies each inventor by his or her legal name and by the processing fee required under 37 CFR 1.17(i). The examiner has required restriction between product or apparatus claims and process claims. Where applicant elects claims directed to the product/apparatus, and all product/apparatus claims are subsequently found allowable, withdrawn process claims that include all the limitations of the allowable product/apparatus claims should be considered for rejoinder. All claims directed to a nonelected process invention must include all the limitations of an allowable product/apparatus claim for that process invention to be rejoined. In the event of rejoinder, the requirement for restriction between the product/apparatus claims and the rejoined process claims will be withdrawn, and the rejoined process claims will be fully examined for patentability in accordance with 37 CFR 1.104. Thus, to be allowable, the rejoined claims must meet all criteria for patentability including the requirements of 35 U.S.C. 101, 102, 103 and 112. Until all claims to the elected product/apparatus are found allowable, an otherwise proper restriction requirement between product/apparatus claims and process claims may be maintained. Withdrawn process claims that are not commensurate in scope with an allowable product/apparatus claim will not be rejoined. See MPEP § 821.04. Additionally, in order for rejoinder to occur, applicant is advised that the process claims should be amended during prosecution to require the limitations of the product/apparatus claims. Failure to do so may result in no rejoinder. Further, note that the prohibition against double patenting rejections of 35 U.S.C. 121 does not apply where the restriction requirement is withdrawn by the examiner before the patent issues. See MPEP § 804.01. Claim Rejections - 35 USC § 103 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 (i.e., changing from AIA to pre-AIA ) 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, 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. Claims 12, 20, 22, 26-27, 31-38 are rejected under 35 U.S.C. 103 as being unpatentable over Westenberg et al. (US 2023/0348728). Regarding claim 12: Westenberg is directed to an elastomer composition comprising: a. an elastomer in an amount of 100 parts per hundred (phr) ([0053]); and b. 30-80 phr of carbon black ([0055]) wherein the carbon black has the following properties: A nitrogen surface area (NSA) of 50 m2/g or more and 100 m2/g or less ([0033]) A statistical thickness surface area (STSA) ranging from 50 m2/g or more and 100 m2/g or less ([0034]), An iodine absorption number of 60 mg/g or more and 70 mg/g or less, An oil absorption number (OAN) 70 mL/100 g or more and 110 mL/100 g or less ([0035]) A compressed oil absorption number (COAN) of 60 mL/100 g or more and 100 mL/100 g or less ([0036]). While Westenberg doesn’t mention a single carbon black simultaneously comprising the aforementioned properties in a single carbon black, it would have been obvious to have selected such a carbon black since Westenberg discloses finite number of identified, predictable options and one of ordinary skill in the art could have pursued the known potential solutions with a reasonable expectation of success. Therefore, one skilled in the art would have been motivated to have selected a carbon black having properties within the scope of claim 12 of the present invention. Regarding claim 22: Elastomers include natural rubber, polybutadiene, styrene butadiene rubber (SBR), synthetic polyisoprene rubber, butyl rubber, ethylene propylene rubber, and combinations thereof ([0053]) Regarding claims 20, 26-27, 31-37: Westenberg doesn't specifically recite properties of an a 325 mesh water wash residue, IFM dispersion index, tensile strength, elongation at break, hysteresis indicator value, tear strength value, cord adhesion, and fatigue life value with regards to a reference composition replaced with ASTM N326 grade carbon black. However, the elastomeric composition produced in Westenberg is substantially identical to the elastomeric composition produced in the instant invention. Case law holds that the claimed and prior art products are identical or substantially identical in structure or composition, or are produced by identical or substantially identical processes, a prima facie case of either anticipation or obviousness has been established. In re Best, 562 F.2d 1252, 1255, 195 USPQ 430, 433 (CCPA 1977). MPEP 2112.01(I). Hence, Westenberg suggests an elastomeric composition having the aforementioned properties of within the scope of claims 20, 26-27, 31-37. Since PTO cannot conduct experiments the proof of burden is shifted to the applicants to establish an unobviousness difference, see In re Best, 562 F.2d 1252, 195 USPQ 430 (CCPA 1977). See MPEP § 2112.01. If it is the applicant’s position that this would not be the case: (1) evidence would need to be provided to support the applicant's position; and (2) it would be the Office's position that the application contains inadequate disclosure, since one skilled in the art would not understand how to obtain the claimed properties with only the claimed reactants, claimed amounts, and substantially similar process of making. Regarding claim 38: An article is disclosed. Contact Information Any inquiry concerning this communication or earlier communications from the examiner should be directed to ROBERT T BUTCHER whose telephone number is (571)270-3514. The examiner can normally be reached Telework M-F 9-5 Pacific Time Zone. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Lanee Reuther can be reached at (571) 270-7026. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /ROBERT T BUTCHER/Primary Examiner, Art Unit 1764
Read full office action

Prosecution Timeline

Jun 15, 2023
Application Filed
Jan 23, 2026
Non-Final Rejection — §103, §DP (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12600874
AQUEOUS PIGMENTED INK
2y 5m to grant Granted Apr 14, 2026
Patent 12600086
BINDER SYSTEM AND DEVICES FOR 3-D PRINTING AND ARTICLES PRODUCED THEREFROM
2y 5m to grant Granted Apr 14, 2026
Patent 12584001
HIGH EFFICACY CU-BASED ANTI-MICROBIAL FILMS AND SUBSTRATES AND METHODS OF MAKING THE SAME
2y 5m to grant Granted Mar 24, 2026
Patent 12577340
STORAGE STABLE TWO-COMPONENT DUAL CURE DENTAL COMPOSITION
2y 5m to grant Granted Mar 17, 2026
Patent 12577406
RESIN COMPOSITION, FILM, AND MULTILAYER STRUCTURE
2y 5m to grant Granted Mar 17, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

AI Strategy Recommendation

Get an AI-powered prosecution strategy using examiner precedents, rejection analysis, and claim mapping.
Powered by AI — typically takes 5-10 seconds

Prosecution Projections

1-2
Expected OA Rounds
71%
Grant Probability
89%
With Interview (+18.4%)
2y 8m
Median Time to Grant
Low
PTA Risk
Based on 941 resolved cases by this examiner. Grant probability derived from career allow rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month