Prosecution Insights
Last updated: April 19, 2026
Application No. 18/136,537

ELECTROPHOTOGRAPHIC PHOTORECEPTOR, CARTRIDGE USING SAME, AND IMAGE FORMING DEVICE

Final Rejection §112
Filed
Apr 19, 2023
Examiner
VAJDA, PETER L
Art Unit
1737
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Mitsubishi Chemical Corporation
OA Round
2 (Final)
75%
Grant Probability
Favorable
3-4
OA Rounds
2y 7m
To Grant
88%
With Interview

Examiner Intelligence

Grants 75% — above average
75%
Career Allow Rate
737 granted / 985 resolved
+9.8% vs TC avg
Moderate +13% lift
Without
With
+13.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
20 currently pending
Career history
1005
Total Applications
across all art units

Statute-Specific Performance

§103
57.1%
+17.1% vs TC avg
§102
24.5%
-15.5% vs TC avg
§112
13.4%
-26.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 985 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 . 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. Claims 1-16 are 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. Claims 1-16 are indefinite for claiming the invention in terms of physical properties rather than the chemical or structural features that produce said properties. Ex parte Slob, 157 USPQ 172, states, “Claims merely setting forth physical characteristics desired in an article, and not setting forth specific composition which would meet such characteristics, are invalid as vague, indefinite, and functional since they cover any conceivable combination of ingredients either presently existing or which might be discovered in the future and which would impart said desired characteristics.” Also, “it is necessary that the product be described with sufficient particularity that it can be identified so that one can determine what will and will not infringe.” Benger Labs, Ltd v. R.K. Laros Co., 135 USPQ 11, In re Bridgeford 149 USPQ 55, Locklin et al. v. Switzer Bros., Inc., 131 USPQ 294; furthermore, “Reciting the physical and chemical characteristics of the claimed product will not suffice where it is not certain that a sufficient number of characteristics have been recited that the claim reads only on the particular compound which applicant has invented.” Ex parte Siddiqui, 156 USPQ 426, Ex parte Davission et al., 133 USPQ 400, Ex parte Fox, 128 USPQ 157. In the instant claims the Applicant has recited the invention in terms of the ratio of an absorbance area at a wavelength of 1647 cm-1 to 1627 cm-1 and a wavelength of 1800 cm-1 to 1647 cm-1 in an infrared absorption spectrum rather than reciting the specific chemical compositions that give rise to said absorbance ratio. The claims are therefore indefinite as they fail to recite a sufficient number of characteristics such tha the claim read only on the particular compound which the applicant has invented. Furthermore, as recited one of ordinary skill in the art would not be able to ascertain, absent undue experimentation, which existing photoreceptors would and would not infringe. For all the reasons cited in this rejection the Applicant’s claims are indefinite. In order to overcome this rejection, the Applicant should amend the claim to recite the specific compositions that combine to give rise to the recited properties of the claimed photoreceptor. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to PETER L VAJDA whose telephone number is (571)272-7150. The examiner can normally be reached 7:30-4:00 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, Mark Huff can be reached at (571)272-1385. 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. /PETER L VAJDA/ Primary Examiner, Art Unit 1737 09/30/2025
Read full office action

Prosecution Timeline

Apr 19, 2023
Application Filed
Sep 30, 2025
Non-Final Rejection — §112
Jan 15, 2026
Examiner Interview Summary
Feb 01, 2026
Response Filed
Apr 10, 2026
Final Rejection — §112 (current)

Precedent Cases

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2y 5m to grant Granted Mar 17, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

3-4
Expected OA Rounds
75%
Grant Probability
88%
With Interview (+13.0%)
2y 7m
Median Time to Grant
Moderate
PTA Risk
Based on 985 resolved cases by this examiner. Grant probability derived from career allow rate.

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