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Last updated: October 25, 2026

Ji Sun Yoon, USPTO Patent Examiner

Listed by the USPTO as YOON, JI SUN

Tech Center 2900 • Art Units: 2911 2938

This examiner grants 98% of resolved cases

Performance Statistics

98.4%

Allow Rate

+38.4% vs TC avg

194

Total Applications

-1.7%

Interview Lift

684

Avg Prosecution Days

Based on 192 resolved cases, 2023–2026

Rejection Statute Breakdown

§101 Eligibility

10.6%

§102 Novelty

0.4%

§103 Obviousness

80.9%

§112 Clarity

Currently Pending Office Actions

App #	Title	Status	Assignee
35525430	Water bar	Non-Final OA	STRAUSS WATER LTD
35525326	Coffee maker	Non-Final OA	Guangdong Midea Consumer Electric Manufacturing Co., Ltd.

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Who Appears Before This Examiner

Top companies before this examiner

Law firms appearing most often

CANTOR COLBURN LLP (1)
K&L Gates LLP (1)

Frequently Asked Questions

What is examiner Ji Sun Yoon's allowance rate?

98.4% of resolved applications examined by Ji Sun Yoon were allowed (192 resolved cases), compared with 96.1% across Art Unit 2911 over the last five years.

Does an interview help with examiner Ji Sun Yoon?

This examiner's interview lift is -1.7 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Ji Sun Yoon take to allow a patent?

Applications allowed by Ji Sun Yoon took 684 days on average from filing to allowance.

Which art unit does examiner Ji Sun Yoon work in?

Ji Sun Yoon examines applications in Art Unit 2911 in Tech Center 2900.