Prosecution Insights
Last updated: October 26, 2026

Hong Sang, USPTO Patent Examiner

Listed by the USPTO as SANG, HONG

Tech Center 1600 • Art Units: 1643 1645 1646

This examiner grants 55% of resolved cases

Analysis

SANG, HONG examines in Tech Center 1600 and Art Unit 1643. The record covers 934 resolved cases, with a 54.9% allowance rate and a 62.8% interview lift. Median time to allowance is 1274 days. The substantial case volume makes the interview measure particularly relevant for practitioners deciding how prominently to feature examiner interaction in prosecution planning.

Listed companies include Janssen Pharmaceuticals Inc., Chugai Seiyaku Kabushiki Kaisha, and The United States of America, as represented by the Secretary, Department of Health and Human Services. Listed firms are Hamilton, Brook, Smith & Reynolds, P.C., STERNE, KESSLER, GOLDSTEIN & FOX P.L.L.C., and BROWNSTEIN HYATT FARBER SCHRECK, LLP. These participants indicate established activity across pharmaceutical and public-sector matters in the docket.

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

Performance Statistics

54.9%
Allow Rate
-5.1% vs TC avg
975
Total Applications
+62.8%
Interview Lift
1274
Avg Prosecution Days
Based on 934 resolved cases, 2023–2026

Rejection Statute Breakdown

4.5%
§101 Eligibility
16.9%
§102 Novelty
28.4%
§103 Obviousness
30.0%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
17774685 Anti-TIGIT Antibodies and Uses Thereof Non-Final OA Merck Patent GmbH

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Frequently Asked Questions

What is examiner Hong Sang's allowance rate?

54.9% of resolved applications examined by Hong Sang were allowed (934 resolved cases), compared with 41.5% across Art Unit 1643 over the last five years.

Does an interview help with examiner Hong Sang?

This examiner's interview lift is +62.8 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Hong Sang take to allow a patent?

Applications allowed by Hong Sang took 1,274 days on average from filing to allowance.

Which art unit does examiner Hong Sang work in?

Hong Sang examines applications in Art Unit 1643 in Tech Center 1600 (Biotechnology & Pharmaceuticals).

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