Prosecution Insights
Last updated: October 26, 2026

Charles J Choi, USPTO Patent Examiner

Listed by the USPTO as CHOI, CHARLES J

Tech Center 2100 • Art Units: 2133 2137 2175

This examiner grants 83% of resolved cases

Analysis

CHOI, CHARLES J is assigned to Tech Center 2100 and Art Unit 2133. The record covers 322 resolved cases, a 82.9% allowance rate, and a median of 928 days to allowance. The interview lift is 4.9%, indicating a positive but modest association with allowance outcomes.

Pure Storage Inc., Samsung Electronics Co., Ltd., and Micron Technology Inc. are the listed leading companies. FISH & RICHARDSON P.C. (TC) and Nixon Peabody LLP are the listed leading firms. Practitioners may consider interviews, while giving primary attention to the claim and response record reflected by the allowance measure.

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

Performance Statistics

82.9%
Allow Rate
+27.9% vs TC avg
335
Total Applications
+4.9%
Interview Lift
928
Avg Prosecution Days
Based on 322 resolved cases, 2023–2026

Rejection Statute Breakdown

3.3%
§101 Eligibility
21.8%
§102 Novelty
47.6%
§103 Obviousness
19.6%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18947146 STORAGE DEVICE, BUFFER CHIP, AND METHOD OF OPERATING STORAGE DEVICE Final Rejection Samsung Electronics Co., Ltd.
19053323 ADAPTIVE BUFFER FOR MANAGED FLASH SYSTEM Non-Final OA PURE STORAGE, INC.
18963129 DYNAMIC CONVERSION OF MEMORY Final Rejection PURE STORAGE, INC.
18593806 Intelligent Allocation of Read and Write Buffers in Memory Sub-Systems Final Rejection Micron Technology, Inc.
19276781 METHODS AND APPARATUS TO FACILITATE WRITE MISS CACHING IN CACHE SYSTEM Non-Final OA TEXAS INSTRUMENTS INCORPORATED

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Frequently Asked Questions

What is examiner Charles J Choi's allowance rate?

82.9% of resolved applications examined by Charles J Choi were allowed (322 resolved cases), compared with 85.8% across Art Unit 2133 over the last five years.

Does an interview help with examiner Charles J Choi?

This examiner's interview lift is +4.9 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Charles J Choi take to allow a patent?

Applications allowed by Charles J Choi took 928 days on average from filing to allowance.

Which art unit does examiner Charles J Choi work in?

Charles J Choi examines applications in Art Unit 2133 in Tech Center 2100 (Computing & Software).

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