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Last updated: October 26, 2026

Joseph R Kosack, USPTO Patent Examiner

Listed by the USPTO as KOSACK, JOSEPH R

Tech Center 3900 • Art Units: 1626 3991

This examiner grants 75% of resolved cases

Performance Statistics

74.8%

Allow Rate

+14.8% vs TC avg

1,317

Total Applications

-6.1%

Interview Lift

968

Avg Prosecution Days

Based on 1297 resolved cases, 2023–2026

Rejection Statute Breakdown

3.2%

§101 Eligibility

22.7%

§102 Novelty

27.6%

§103 Obviousness

29.9%

§112 Clarity

Currently Pending Office Actions

App #	Title	Status	Assignee
18020478	COMPOUND FOR ORGANIC OPTOELECTRONIC ELEMENT, COMPOSITION FOR ORGANIC OPTOELECTRONIC ELEMENT, ORGANIC OPTOELECTRONIC ELEMENT, AND DISPLAY DEVICE	Non-Final OA	SAMSUNG SDI CO., LTD.

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Who Appears Before This Examiner

Top companies before this examiner

Verdant Technologies LLC (1)
Samsung SDI Co., Ltd. (1)
Sun Pharmaceutical Industries Ltd. (1)
University of Pittsburgh (1)
BEIGENE, LTD. (1)
Idorsia Pharmaceuticals Ltd. (1)
Jiangsu Hengrui Pharmaceuticals Co. Ltd. (1)
Zhengzhou University (1)

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Frequently Asked Questions

What is examiner Joseph R Kosack's allowance rate?

74.8% of resolved applications examined by Joseph R Kosack were allowed (1,297 resolved cases), compared with 54.9% across Art Unit 1626 over the last five years.

Does an interview help with examiner Joseph R Kosack?

This examiner's interview lift is -6.1 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Joseph R Kosack take to allow a patent?

Applications allowed by Joseph R Kosack took 968 days on average from filing to allowance.

Which art unit does examiner Joseph R Kosack work in?

Joseph R Kosack examines applications in Art Unit 1626 in Tech Center 3900.