Prosecution Insights
Last updated: October 27, 2026

Kawing Chan, USPTO Patent Examiner

Listed by the USPTO as CHAN, KAWING

Tech Center 2800 • Art Units: 2837 2846

This examiner grants 74% of resolved cases

Analysis

CHAN, KAWING has 786 resolved cases, an allowance rate of 73.5%, and a median of 1052 days to allowance. The profile is assigned to Tech Center 2800 and art unit 2837. The 11.8% interview lift indicates a positive measured association, but it is not a substitute for claim and prior-art analysis.

The listed companies are KONE Corporation, Inventio AG, and Robert Bosch GmbH, with a focus on elevator and industrial technologies. BIRCH STEWART KOLASCH & BIRCH, LLP, Knobbe, Martens, Olson & Bear, LLP, and SHUMAKER, LOOP & KENDRICK, LLP are the leading listed firms. These relationships can help counsel locate relevant prosecution experience for similar matters.

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

Performance Statistics

73.5%
Allow Rate
+5.5% vs TC avg
815
Total Applications
+11.8%
Interview Lift
1052
Avg Prosecution Days
Based on 786 resolved cases, 2023–2026

Rejection Statute Breakdown

3.3%
§101 Eligibility
17.1%
§102 Novelty
54.9%
§103 Obviousness
21.8%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
17896131 HIGH POWER BATTERY-POWERED SYSTEM Non-Final OA MILWAUKEE ELECTRIC TOOL CORPORATION
18853200 METHOD FOR MONITORING THE OPERATION OF A VEHICLE ELECTRICAL SYSTEM Non-Final OA Robert Bosch GmbH

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Frequently Asked Questions

What is examiner Kawing Chan's allowance rate?

73.5% of resolved applications examined by Kawing Chan were allowed (786 resolved cases), compared with 61.1% across Art Unit 2837 over the last five years.

Does an interview help with examiner Kawing Chan?

This examiner's interview lift is +11.8 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Kawing Chan take to allow a patent?

Applications allowed by Kawing Chan took 1,052 days on average from filing to allowance.

Which art unit does examiner Kawing Chan work in?

Kawing Chan examines applications in Art Unit 2837 in Tech Center 2800 (Semiconductors, Circuits & Optics).

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