Prosecution Insights
Last updated: October 27, 2026

Kathryn Elizabeth Limbaugh, USPTO Patent Examiner

Listed by the USPTO as LIMBAUGH, KATHRYN ELIZABETH

Tech Center 1700 • Art Units: 1797

This examiner grants 76% of resolved cases

Analysis

LIMBAUGH, KATHRYN ELIZABETH handles cases in USPTO tech center 1700 and art unit 1797. The profile includes 199 resolved cases, a 76.4% allowance rate, a 31.4% interview lift, and a median of 1108 days to allowance. The interview measure is a significant part of the profile, supporting deliberate preparation for examiner discussions in addition to written responses.

Hitachi Ltd., Seegene Inc., and Arkray Inc. are the listed companies. COOLEY LLP, MATTINGLY & MALUR, PC, and Studebaker Brackett PLLC are the leading firms. The company mix spans medical and technology applications, so practitioners should present clear technical distinctions and align interview materials with the particular application record.

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

Performance Statistics

76.4%
Allow Rate
+11.4% vs TC avg
214
Total Applications
+31.4%
Interview Lift
1108
Avg Prosecution Days
Based on 199 resolved cases, 2023–2026

Rejection Statute Breakdown

6.6%
§101 Eligibility
20.7%
§102 Novelty
41.7%
§103 Obviousness
27.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18580133 SAMPLE CONVEYING DEVICE AND SAMPLE CONVEYING METHOD Non-Final OA HITACHI HIGH-TECH CORPORATION
18268772 METHODS FOR PURIFICATION OF RECOMBINANT PROTEINS Final Rejection AMGEN INC.
18269641 METHOD FOR ASSESSING MITOCHONDRIAL FUNCTION IN TISSUE OR ORGAN OTHER THAN KIDNEY IN TEST SUBJECT Final Rejection HAMAMATSU PHOTONICS K.K.
18386762 CARTRIDGE FOR DETECTING TARGET ANALYTE Non-Final OA SEEGENE, INC.
18467439 ACCURACY MANAGEMENT METHOD, HOLDING TOOL, AND MEASUREMENT DEVICE Final Rejection ARKRAY, Inc.

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Frequently Asked Questions

What is examiner Kathryn Elizabeth Limbaugh's allowance rate?

76.4% of resolved applications examined by Kathryn Elizabeth Limbaugh were allowed (199 resolved cases), compared with 54.8% across Art Unit 1797 over the last five years.

Does an interview help with examiner Kathryn Elizabeth Limbaugh?

This examiner's interview lift is +31.4 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Kathryn Elizabeth Limbaugh take to allow a patent?

Applications allowed by Kathryn Elizabeth Limbaugh took 1,108 days on average from filing to allowance.

Which art unit does examiner Kathryn Elizabeth Limbaugh work in?

Kathryn Elizabeth Limbaugh examines applications in Art Unit 1797 in Tech Center 1700 (Chemistry & Materials).

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