Prosecution Insights
Last updated: October 02, 2026

Examiner: CHEUNG, CHUN HOI

Tech Center 3700 • Art Units: 3728 3731 3733 3736

This examiner grants 62% of resolved cases

Analysis

Chun Hoi Cheung, an examiner in Tech Center 3700 and Art Unit 3728, has managed 1068 resolved cases. The data shows an allowance rate of 62.4%, which is the baseline for applicants. However, the interview lift of 39.2% is a significant positive factor, indicating that interviews are an effective tool for increasing the probability of allowance over the 62.4% baseline. This suggests that direct engagement is a key driver of positive outcomes with this examiner.

The median days to allowance is 942, representing the typical pendency for allowed applications among the 1068 resolved cases. Given the 39.2% interview lift, practitioners should strongly consider scheduling an interview to improve the 62.4% allowance rate. This strategy may help navigate the 942-day process more successfully in Art Unit 3728. The examiner's history in Tech Center 3700 suggests that verbal communication is a productive path for applicants.

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

Performance Statistics

62.4%
Allow Rate
-7.6% vs TC avg
1,094
Total Applications
+39.2%
Interview Lift
942
Avg Prosecution Days
Based on 1068 resolved cases, 2023–2026

Rejection Statute Breakdown

0.2%
§101 Eligibility
21.5%
§102 Novelty
52.4%
§103 Obviousness
23.9%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18812265 CONTROLLED DESICCANT ABSORPTION AND POSITIONING SYSTEM FOR MEDICAL DEVICES Final Rejection Boston Scientific Scimed, Inc.

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