Prosecution Insights
Last updated: August 06, 2026
Application No. 18/035,838

THERMO-OPTICAL PHASE SHIFTER

Final Rejection §112
Filed
May 08, 2023
Priority
Oct 20, 2021 — CN 202111220232.4 +1 more
Examiner
STAHL, MICHAEL J
Art Unit
2874
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Silith Technology (Suzhou) Co. Ltd.
OA Round
2 (Final)
90%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
98%
With Interview

Examiner Intelligence

Grants 90% — above average
90%
Career Allowance Rate
1144 granted / 1271 resolved
+22.0% vs TC avg
Moderate +8% lift
Without
With
+7.5%
Interview Lift
resolved cases with interview
Fast prosecutor
1y 12m
Avg Prosecution
28 currently pending
Career history
1289
Total Applications
across all art units

Statute-Specific Performance

§101
1.1%
-38.9% vs TC avg
§103
23.8%
-16.2% vs TC avg
§102
41.3%
+1.3% vs TC avg
§112
30.0%
-10.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1271 resolved cases

Office Action

§112
Notice of Pre-AIA or AIA Status The present application, filed 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. Claim 11 is rejected under 35 U.S.C. 112(b) as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor regards as the invention. Claim 11 is indefinite because there is insufficient antecedent basis for "the resistive heater" as recited in line 2. No resistive heater is recited earlier in claim 11 or in parent claim 1. It is noted that claim 11 originally depended from claim 2, which did introduce a resistive heater, but claim 2 was canceled. Response to Arguments All rejections of the 7/7/2025 action were overcome by the 2/16/2026 response. Allowable Subject Matter Claims 1, 5-10, and 12-14 are allowed. Conclusion THIS ACTION IS MADE FINAL. 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. Contact Information Examiner: 571-272-2360 Examiner's direct supervisor: 571-272-2397 Official correspondence by fax: 571-273-8300 Information regarding the status of an application may be obtained from Patent Center. Should you have questions about Patent Center, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). /Michael Stahl/Primary Examiner, Art Unit 2874
Read full office action

Prosecution Timeline

May 08, 2023
Application Filed
Jul 07, 2025
Non-Final Rejection mailed — §112
Sep 25, 2025
Response after Non-Final Action
Sep 25, 2025
Response Filed
Feb 16, 2026
Response Filed
May 26, 2026
Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12699226
FIBER OPTIC BEAM SPLITTER
2y 8m to grant Granted Aug 04, 2026
Patent 12693141
OPTICAL FIBER SENSING SYSTEM, HOST SENSING DEVICE, REMOTE SENSING DEVICE, SENSING METHOD, AND SENSING DEVICE CONTROL METHOD
3y 0m to grant Granted Jul 28, 2026
Patent 12693482
SEALING STRUCTURE FOR OPTOELECTRONIC TRANSCEIVER DEVICE
2y 4m to grant Granted Jul 28, 2026
Patent 12687689
CABINET WITH SLIDING COMPONENT MOUNT
2y 8m to grant Granted Jul 21, 2026
Patent 12678831
SYSTEMS AND METHODS FOR OPTICAL FIBER CLEANING AND INTERFACE PARTICLE REDUCTION
2y 6m to grant Granted Jul 14, 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
90%
Grant Probability
98%
With Interview (+7.5%)
1y 12m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1271 resolved cases by this examiner. Grant probability derived from career allowance rate.

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