Prosecution Insights
Last updated: October 02, 2026

Examiner: CHOY, KA SHAN

Tech Center 2400 • Art Units: 2400 2435

This examiner grants 93% of resolved cases

Analysis

Ka Shan Choy serves in Tech Center 2400 and Art Unit 2400. With 274 resolved cases, the examiner has a solid level of experience. The allowance rate is an impressive 93.1 percent, which is exceptionally high and suggests a very favorable environment for applicants. This rate indicates that almost all cases reaching a final resolution under this examiner result in a patent grant.

The interview lift is 10.0 percent, showing a positive impact from direct communication. Given the already high allowance rate, the benefit of an interview is less dramatic than in other units but still present. Efficiency is also a key feature, with a median days to allowance of 790. This is a very fast timeline, suggesting that applications move through the process quickly and successfully. Practitioners can expect a high probability of success and a relatively short 790-day path to a grant when working with this examiner.

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

Performance Statistics

93.1%
Allow Rate
+35.1% vs TC avg
284
Total Applications
+10.0%
Interview Lift
790
Avg Prosecution Days
Based on 274 resolved cases, 2023–2026

Rejection Statute Breakdown

8.5%
§101 Eligibility
16.8%
§102 Novelty
44.3%
§103 Obviousness
19.7%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19015397 PERMISSION CONTROL VIA DATA REDUNDANCY IN DETERMINISTIC STREAMING SYSTEM Non-Final OA Groq, Inc.

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