Prosecution Insights
Last updated: August 16, 2026
Application No. 18/681,673

CARBON FIBER BUNDLE AND PRODUCTION METHOD THEREFOR

Non-Final OA §112
Filed
Feb 06, 2024
Priority
Sep 15, 2021 — JP 2021-149992 +1 more
Examiner
THOMPSON, CAMIE S
Art Unit
Tech Center
Assignee
Toray Industries Inc.
OA Round
1 (Non-Final)
74%
Grant Probability
Favorable
1-2
OA Rounds
11m
Est. Remaining
84%
With Interview

Examiner Intelligence

Grants 74% — above average
74%
Career Allowance Rate
984 granted / 1337 resolved
+13.6% vs TC avg
Moderate +10% lift
Without
With
+10.3%
Interview Lift
resolved cases with interview
Typical timeline
3y 5m
Avg Prosecution
47 currently pending
Career history
1388
Total Applications
across all art units

Statute-Specific Performance

§101
1.1%
-38.9% vs TC avg
§103
43.0%
+3.0% vs TC avg
§102
27.4%
-12.6% vs TC avg
§112
19.5%
-20.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1337 resolved cases

Office Action

§112
DETAILED ACTION Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Applicant’s election, without traverse, of Group I claims 1-6 directed to a carbon fiber bundle. Accordingly, claims 7-8 are withdrawn from consideration at this time. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claim 3 is rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Claim 3 is rendered indefinite because of the term “either”. It is unclear if claim 3 is dependent upon claim 1 or another claim. For purposes of examination, Examiner is interpreting claim 3 to depend upon claim 1. Claims 1-2 and 4-6 are allowed. Applicant claims a carbon fiber bundle as recited in claim 1. The closest prior art, Tanaka et al., JP 2021-059829, teaches a carbon fiber having superior mechanical characteristics wherein the carbon fiber is made of plural monofilaments in which an average value of long axis/short axis ratio in a cross-section ranges from 1.0 to 1.15, a variation of coefficient of the long axis/short axis ratio is 3-15% and a skewness of the long axis/short axis ratio is 1.2-4.0 [abstract]. Paragraph 0026 discloses that the strand modulus is 300 GPa or more. Paragraph 0027 discloses that the strand strength is 4.0 or higher. Paragraph 0034 discloses 1,000 to 80,000 filaments. Paragraph 0038 discloses a method of producing the carbon fiber bundle treated with a flame retardant treatment. Also, paragraph 0042 discloses a carbonization process. Tanaka fails to teach or suggest that the carbon fiber has an elongation percentage of 1.8% or more and an overall fineness of 0.15 to 0.35 g/m. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to CAMIE S THOMPSON whose telephone number is (571)272-1530. The examiner can normally be reached 8:30 am - 5:30 pm. 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, Jennifer Boyd, can be reached at 571-272-7783. 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. /CAMIE S THOMPSON/Primary Examiner, Art Unit 1786
Read full office action

Prosecution Timeline

Feb 06, 2024
Application Filed
Jul 31, 2026
Non-Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12703931
FIBER
2y 5m to grant Granted Aug 11, 2026
Patent 12698409
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5y 1m to grant Granted Aug 04, 2026
Patent 12697799
Composite System to Shield and Protect Batteries from Radiation and Fire
2y 9m to grant Granted Aug 04, 2026
Patent 12692354
CARBON FIBER REINFORCED COMPOSITE AND PRODUCTION METHOD OF CARBON FIBER REINFORCED COMPOSITE
2y 4m to grant Granted Jul 28, 2026
Patent 12686635
COLORED OPTICAL FIBER, OPTICAL FIBER RIBBON, OPTICAL FIBER RIBBON CABLE AND METHOD FOR MANUFACTURING THE SAME
2y 7m to grant Granted Jul 21, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
74%
Grant Probability
84%
With Interview (+10.3%)
3y 5m (~11m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1337 resolved cases by this examiner. Grant probability derived from career allowance rate.

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