Prosecution Insights
Last updated: October 26, 2026

Karen Masih, USPTO Patent Examiner

Listed by the USPTO as MASIH, KAREN

Tech Center 2800 • Art Units: 2837 2846

This examiner grants 91% of resolved cases

Analysis

MASIH, KAREN is assigned to tech center 2800 and art unit 2837. Across 1037 resolved cases, the allowance rate is 91.0% and the interview lift is 6.6%. The median time to allowance is 707 days, offering a practical timing reference for applicants and counsel.

Listed companies include Nintendo Co., Ltd., MILWAUKEE ELECTRIC TOOL Corporation, and Infineon Technologies AG. Listed firms include FINNEGAN, HENDERSON, FARABOW, GARRETT & DUNNER and MYERS BIGEL, P.A. The allowance record is prominent, while the interview measure suggests limited incremental effect.

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

Performance Statistics

91.0%
Allow Rate
+23.0% vs TC avg
1,056
Total Applications
+6.6%
Interview Lift
707
Avg Prosecution Days
Based on 1037 resolved cases, 2023–2026

Rejection Statute Breakdown

6.6%
§101 Eligibility
9.8%
§102 Novelty
50.6%
§103 Obviousness
24.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18979980 SENSORED FIELD ORIENTED CONTROL IN A POWER TOOL Non-Final OA MILWAUKEE ELECTRIC TOOL CORPORATION
18999872 INFORMATION PROCESSING METHOD, COMPUTER SYSTEM, AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM Non-Final OA NINTENDO CO., LTD.

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Frequently Asked Questions

What is examiner Karen Masih's allowance rate?

91.0% of resolved applications examined by Karen Masih were allowed (1,037 resolved cases), compared with 61.1% across Art Unit 2837 over the last five years.

Does an interview help with examiner Karen Masih?

This examiner's interview lift is +6.6 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Karen Masih take to allow a patent?

Applications allowed by Karen Masih took 707 days on average from filing to allowance.

Which art unit does examiner Karen Masih work in?

Karen Masih examines applications in Art Unit 2837 in Tech Center 2800 (Semiconductors, Circuits & Optics).

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