Prosecution Insights
Last updated: April 18, 2026
Application No. 18/757,949

PHOTORESIST FOR SEMICONDUCTOR FABRICATION

Final Rejection §112
Filed
Jun 28, 2024
Examiner
CHU, JOHN S Y
Art Unit
1737
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Taiwan Semiconductor Manufacturing Company Ltd.
OA Round
2 (Final)
77%
Grant Probability
Favorable
3-4
OA Rounds
3y 1m
To Grant
82%
With Interview

Examiner Intelligence

Grants 77% — above average
77%
Career Allow Rate
740 granted / 959 resolved
+12.2% vs TC avg
Moderate +5% lift
Without
With
+5.1%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
65 currently pending
Career history
1024
Total Applications
across all art units

Statute-Specific Performance

§101
0.2%
-39.8% vs TC avg
§103
48.2%
+8.2% vs TC avg
§102
29.9%
-10.1% vs TC avg
§112
12.1%
-27.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 959 resolved cases

Office Action

§112
DETAILED CORRESPONDENCE This Office action is in response to the election received March 6, 2026. Any bolded text indicates new rejections and/or language not in the previous office action. Claim Rejections - 35 USC § 112 The following is a quotation of the first paragraph of 35 U.S.C. 112(a): (a) IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. The following is a quotation of the first paragraph of pre-AIA 35 U.S.C. 112: The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor of carrying out his invention. 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. The following is a quotation of 35 U.S.C. 112(d): (d) REFERENCE IN DEPENDENT FORMS.—Subject to subsection (e), a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. The following is a quotation of pre-AIA 35 U.S.C. 112, fourth paragraph: Subject to the following paragraph [i.e., the fifth paragraph of pre-AIA 35 U.S.C. 112], a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. Claims 1-20 are rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for applications subject to pre-AIA 35 U.S.C. 112, the inventor(s), at the time the application was filed, had possession of the claimed invention. Throughout the specification, applicants refer to a transition metal coordinated to a first nitrogen atom on a first and second pyrazine ring ligand, however, the only metals mentioned specifically in the specification are metals which are post-transition metal and metalloids as classified on the periodic table, see para. [0036] to tin (Sn), bismuth (Bi), antimony (Sb), indium (In) and tellurium (Te). Now applicants have expanded the claim language to include all metals, however the specification as originally filed only supports metals listed in para. [0036]. Correction to resolve and clarify the metals desired is necessary. Claims 11 and 17 are rejected under 35 U.S.C. 112(d) or pre-AIA 35 U.S.C. 112, 4th paragraph, as being of improper dependent form for failing to further limit the subject matter of the claim upon which it depends, or for failing to include all the limitations of the claim upon which it depends. Claims 1-20 may be seen as allowable over the prior art of record. Upon clarification for proper support from the specification of the amendments to the claims. The claims may be rejected over the newly cited art of record. The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. FREEDMAN et al (2015/0079393) disclose di-dentate pyrazine ligands, as recited wherein the metals in the examples are Fe, Cr and Co. 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 nonprovisional extension fee (37 CFR 1.17(a)) 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 mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to JOHN S. CHU whose telephone number is (571)272-1329. The examiner can normally be reached on IFP-Flex. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Mark Huff, can be reached at telephone number (571)272-1329. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from Patent Center. Status information for published applications may be obtained from Patent Center. Status information for unpublished applications is available through Patent Center to authorized users only. Should you have questions about access to the USPTO patent electronic filing system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). Examiner interviews are available via a variety of formats. See MPEP § 713.01. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) Form at https://www.uspto.gov/InterviewPractice. /John S. Chu/ Primary Examiner, Art Unit 1737 J. Chu March 23, 2026
Read full office action

Prosecution Timeline

Jun 28, 2024
Application Filed
Dec 08, 2025
Non-Final Rejection — §112
Mar 06, 2026
Response Filed
Mar 23, 2026
Final Rejection — §112
Mar 31, 2026
Examiner Interview Summary
Mar 31, 2026
Applicant Interview (Telephonic)
Apr 07, 2026
Response after Non-Final Action

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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
77%
Grant Probability
82%
With Interview (+5.1%)
3y 1m
Median Time to Grant
Moderate
PTA Risk
Based on 959 resolved cases by this examiner. Grant probability derived from career allow rate.

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