Prosecution Insights
Last updated: October 27, 2026

David H Cho, USPTO Patent Examiner

Listed by the USPTO as CHO, DAVID H

Tech Center 1600 • Art Units: 1693

This examiner grants 32% of resolved cases

Analysis

David H. Cho has 47 resolved cases in Art Unit 1693 of Tech Center 1600. His allowance rate of 31.9 percent is a metric for securing a patent grant. Furthermore, the median days to allowance of 1248 suggests a prosecution process for successful applications, requiring applicants to prepare for the timeline. This duration indicates that achieving a grant in this docket involves a long-term strategy and persistent effort.

The most notable figure is the interview lift of 67.0 percent, which is a data point in this profile. This suggests that conducting an interview is a critical strategy for overcoming rejections and moving toward the 31.9 percent allowance rate. Major applicants such as DSM IP Assets B.V., UNIVERSIDAD DE SEVILLA, and University of Southern California may find this approach a tool for success. Firms like FINNEGAN, HENDERSON, FARABOW, GARRETT & DUNNER, Fox Rothschild LLP, and Knobbe, Martens, Olson & Bear, LLP frequently manage these cases, utilizing the 67.0 percent lift to navigate the examination landscape.

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

Performance Statistics

31.9%
Allow Rate
-28.1% vs TC avg
119
Total Applications
+67.0%
Interview Lift
1248
Avg Prosecution Days
Based on 47 resolved cases, 2023–2026

Rejection Statute Breakdown

3.3%
§101 Eligibility
12.9%
§102 Novelty
36.6%
§103 Obviousness
26.4%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18554922 NOVEL USE Final Rejection DSM IP ASSETS B.V.
18546264 METHODS FOR REDUCING PATHOGENIC E COLI BY SELECTIVE FEED ADDITIVE INTERVENTION Non-Final OA DSM IP Assets B.V.
18088628 COMPOUND, SOLID CARRIER INCLUDING THE SAME AND METHOD FOR PREPARING NUCLEIC ACID Final Rejection Industrial Technology Research Institute
18720268 COMPOSITIONS FOR PREVENTING OR FOR REDUCING RISK OF DEVELOPING SECONDARY INFECTIOUS DISEASES Non-Final OA MEIJI CO., LTD.
18702858 OLIGOSACCHARIDE COMPLEXES AND USES Non-Final OA Universidad de Sevilla
18702863 OLIGOSACCHARIDE COMPOUNDS AND COMPLEXES Non-Final OA Universidad de Sevilla
18705643 3D PRINTING SUPPORT MATERIAL AND METHOD FOR MANUFACTURING SAME Non-Final OA OSAKA UNIVERSITY
18300468 PHARMACOLOGIC APPROACH FOR SUPPRESSION OF CORONAVIRUSES Final Rejection Temple University - of the Commonwealth System of Higher Education
18020880 FORMULATIONS OF NICOTINIC ACID DERIVATIVES AND FLAVONOID POLYPHENOLS AND USES THEREOF Final Rejection Animal Biosciences, Inc.

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Frequently Asked Questions

What is examiner David H Cho's allowance rate?

31.9% of resolved applications examined by David H Cho were allowed (47 resolved cases), compared with 59.4% across Art Unit 1693 over the last five years.

Does an interview help with examiner David H Cho?

This examiner's interview lift is +67.0 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner David H Cho take to allow a patent?

Applications allowed by David H Cho took 1,248 days on average from filing to allowance.

Which art unit does examiner David H Cho work in?

David H Cho examines applications in Art Unit 1693 in Tech Center 1600 (Biotechnology & Pharmaceuticals).

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