Prosecution Insights
Last updated: October 26, 2026

Casey George Cha, USPTO Patent Examiner

Listed by the USPTO as CHA, CASEY GEORGE

Tech Center 3700 • Art Units: 3794

This examiner grants 15% of resolved cases

Performance Statistics

15.4%
Allow Rate
-54.6% vs TC avg
38
Total Applications
-18.2%
Interview Lift
1235
Avg Prosecution Days
Based on 13 resolved cases, 2023–2026

Rejection Statute Breakdown

6.5%
§101 Eligibility
23.7%
§102 Novelty
46.8%
§103 Obviousness
20.9%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19116077 IMPROVED HEAT EXCHANGE CATHETERS FOR USE WITH A PATIENT BODY TEMPERATURE MANAGEMENT SYSTEM Non-Final OA ZOLL Circulation, Inc.
17978284 IMPLANTABLE MEDICAL DEVICES INCLUDING TRANSSEPTAL LEAD Non-Final OA Medtronic, Inc.

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Frequently Asked Questions

What is examiner Casey George Cha's allowance rate?

15.4% of resolved applications examined by Casey George Cha were allowed (13 resolved cases), compared with 60.1% across Art Unit 3794 over the last five years.

Does an interview help with examiner Casey George Cha?

This examiner's interview lift is -18.2 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Casey George Cha take to allow a patent?

Applications allowed by Casey George Cha took 1,235 days on average from filing to allowance.

Which art unit does examiner Casey George Cha work in?

Casey George Cha examines applications in Art Unit 3794 in Tech Center 3700 (Medical Devices & Mechanical Engineering).

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