Prosecution Insights
Last updated: October 02, 2026

Examiner: SHEN, WU CHENG WINSTON

Tech Center 1600 • Art Units: 1600 1621 1628 1632 1634 1682 1683

This examiner grants 24% of resolved cases

Analysis

Wu Cheng Winston Shen operates in Tech Center 1600 and Art Unit 1600, having handled 228 resolved cases. The allowance rate pct is 23.7, which is relatively low. The median days to allowance is 1344, reflecting a longer prosecution period for successful applications. These figures suggest that applicants should be prepared for a rigorous and potentially lengthy process when their cases are assigned to this examiner.

The interview lift pct is 25.5, suggesting that interviews are a helpful tactic for overcoming the low 23.7 allowance rate pct. This lift provides a measurable advantage for practitioners seeking to improve their outcomes. With 228 resolved cases, the data indicates that while prosecution is difficult, interviews offer a clear path toward improving the probability of success. The 1344 median days to allowance is a vital statistic for managing expectations. By utilizing the 25.5 interview lift pct, applicants can actively work to mitigate the challenges indicated by the 23.7 allowance rate pct.

Written from this page's own data; every figure is computed from USPTO records and verified before publication.

Performance Statistics

23.7%
Allow Rate
-36.3% vs TC avg
248
Total Applications
+25.5%
Interview Lift
1344
Avg Prosecution Days
Based on 228 resolved cases, 2023–2026

Rejection Statute Breakdown

3.9%
§101 Eligibility
19.3%
§102 Novelty
39.4%
§103 Obviousness
29.9%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18067214 PROGRAMMABLE INSERTION APPROACHES VIA REVERSE TRANSCRIPTASE RECRUITMENT Non-Final OA Massachusetts Institute of Technology
17927454 SCALABLE TRIO GUIDE RNA APPROACH FOR INTEGRATION OF LARGE DONOR DNA Final Rejection University of Southern California
17904180 TELOMERE LENGTH MODULATION USING FIBROBLASTS Final Rejection FIGENE, LLC

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