Prosecution Insights
Last updated: October 27, 2026

Mary Da Zhi Wang Cheung, USPTO Patent Examiner

Listed by the USPTO as CHEUNG, MARY DA ZHI WANG

Tech Center 3600 • Art Units: 3661 3665 3667 3694

This examiner grants 83% of resolved cases

Analysis

Mary Da Zhi Wang Cheung serves in Tech Center 3600 and Art Unit 3661, with 608 resolved cases. The profile shows an allowance rate pct of 83.1%. The interview lift pct is 12.9%, indicating that interviews are a helpful tool for resolving issues and increasing the probability of allowance. This lift provides a steady improvement over the 83.1% baseline success rate.

The median days to allowance is 1110. Major companies on this docket include Robert Bosch GmbH, Aurora Operations Inc., and Honeywell International Inc. The top firm listed is BANNER & WITCOFF, LTD. With an 83.1% allowance rate and an 1110-day median pendency, practitioners should consider the 12.9% interview lift as a useful tactical option for navigating the prosecution process and securing a patent grant.

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

Performance Statistics

83.1%
Allow Rate
+31.1% vs TC avg
623
Total Applications
+12.9%
Interview Lift
1110
Avg Prosecution Days
Based on 608 resolved cases, 2023–2026

Rejection Statute Breakdown

8.9%
§101 Eligibility
26.6%
§102 Novelty
37.2%
§103 Obviousness
13.3%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18716768 CONTROLLER AND CONTROL METHOD FOR STRADDLE-TYPE VEHICLE Final Rejection Robert Bosch GmbH
19173279 AUTONOMOUS VEHICLE BLIND SPOT MANAGEMENT Non-Final OA Aurora Operations, Inc.
19193397 FLIGHT OPERATION RESOURCE USAGE PREDICTION AND OPTIMIZATION Non-Final OA Honeywell International Inc.

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Frequently Asked Questions

What is examiner Mary Da Zhi Wang Cheung's allowance rate?

83.1% of resolved applications examined by Mary Da Zhi Wang Cheung were allowed (608 resolved cases), compared with 77.3% across Art Unit 3661 over the last five years.

Does an interview help with examiner Mary Da Zhi Wang Cheung?

This examiner's interview lift is +12.9 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Mary Da Zhi Wang Cheung take to allow a patent?

Applications allowed by Mary Da Zhi Wang Cheung took 1,110 days on average from filing to allowance.

Which art unit does examiner Mary Da Zhi Wang Cheung work in?

Mary Da Zhi Wang Cheung examines applications in Art Unit 3661 in Tech Center 3600 (Transportation, E-Commerce & Mechanical Systems).

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