Prosecution Insights
Last updated: October 26, 2026

Tak Liang Chiu, USPTO Patent Examiner

Listed by the USPTO as CHIU, TAK LIANG

Tech Center 1700 • Art Units: 1771 1772 1777 1779

This examiner grants 46% of resolved cases

Analysis

CHIU, TAK LIANG works in Tech Center 1700 and Art Unit 1771. The profile reports 44 resolved cases, a 45.5% allowance rate, and a median of 1285 days to allowance. Interviews show a 24.6% lift, indicating a positive association despite the limited case record.

3M Company, National University of Singapore, and Nikkiso Co., Ltd. are the listed leading companies. Barnes & Thornburg LLP (IN), Bryan Cave Leighton Paisner LLP (DC), and Calfee, Halter & Griswold LLP are the listed leading firms. Practitioners should prepare for extended prosecution and evaluate interviews as part of response planning.

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

Performance Statistics

45.5%
Allow Rate
-19.5% vs TC avg
84
Total Applications
+24.6%
Interview Lift
1285
Avg Prosecution Days
Based on 44 resolved cases, 2023–2026

Rejection Statute Breakdown

1.3%
§101 Eligibility
13.8%
§102 Novelty
47.6%
§103 Obviousness
35.7%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18553957 TETRABLOCK COPOLYMERS AND ARTICLES MADE THEREFROM Non-Final OA Solventum Intellectual Properties Company
18836749 METHOD FOR OPERATING DESALTING DEVICE Non-Final OA KURITA WATER INDUSTRIES LTD.

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Frequently Asked Questions

What is examiner Tak Liang Chiu's allowance rate?

45.5% of resolved applications examined by Tak Liang Chiu were allowed (44 resolved cases), compared with 53.8% across Art Unit 1771 over the last five years.

Does an interview help with examiner Tak Liang Chiu?

This examiner's interview lift is +24.6 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Tak Liang Chiu take to allow a patent?

Applications allowed by Tak Liang Chiu took 1,285 days on average from filing to allowance.

Which art unit does examiner Tak Liang Chiu work in?

Tak Liang Chiu examines applications in Art Unit 1771 in Tech Center 1700 (Chemistry & Materials).

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