Prosecution Insights
Last updated: October 26, 2026

Chun Hoi Cheung, USPTO Patent Examiner

Listed by the USPTO as CHEUNG, CHUN HOI

Tech Center 3700 • Art Units: 3728 3731 3736

This examiner grants 62% of resolved cases

Analysis

CHEUNG, CHUN HOI works in tech center 3700 and art unit 3728, with 1072 resolved cases. The allowance rate is 62.4%, and the median time to allowance is 941 days. The interview lift is 39.1%, supporting interviews as a significant tool for addressing examination issues.

The companies represented are Boston Scientific Corporation, Gudeng Precision Industrial Co., Ltd., and Ballid OY. The leading firms are Fitch, Even, Tabin & Flannery, LLP, LANDO & ANASTASI, LLP, and MERCHANT & GOULD P.C. - BAT. Counsel should combine interview preparation with careful claim refinement.

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
1,097
Total Applications
+39.1%
Interview Lift
941
Avg Prosecution Days
Based on 1072 resolved cases, 2023–2026

Rejection Statute Breakdown

0.2%
§101 Eligibility
21.7%
§102 Novelty
51.9%
§103 Obviousness
24.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18812265 CONTROLLED DESICCANT ABSORPTION AND POSITIONING SYSTEM FOR MEDICAL DEVICES Final Rejection Boston Scientific Scimed, Inc.
19234617 CONTAINERS HAVING CORNER PILLARS AND DYNAMIC PANELS BETWEEN THE PILLARS, AND METHODS OF MAKING AND USING SUCH CONTAINERS Final Rejection SOCIETE DES PRODUITS NESTLE S.A.
18797969 STORAGE AND DISPLAY ASSEMBLY FOR A SHAVING RAZOR SYSTEM Final Rejection The Gillette Company LLC

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Frequently Asked Questions

What is examiner Chun Hoi Cheung's allowance rate?

62.4% of resolved applications examined by Chun Hoi Cheung were allowed (1,072 resolved cases), compared with 0.0% across Art Unit 3728 over the last five years.

Does an interview help with examiner Chun Hoi Cheung?

This examiner's interview lift is +39.1 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Chun Hoi Cheung take to allow a patent?

Applications allowed by Chun Hoi Cheung took 941 days on average from filing to allowance.

Which art unit does examiner Chun Hoi Cheung work in?

Chun Hoi Cheung examines applications in Art Unit 3728 in Tech Center 3700 (Medical Devices & Mechanical Engineering).

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