Prosecution Insights
Last updated: October 26, 2026

Katie Leigh Pennington, USPTO Patent Examiner

Listed by the USPTO as PENNINGTON, KATIE LEIGH

Tech Center 1600 • Art Units: 1633 1634

This examiner grants 32% of resolved cases

Analysis

Katie Leigh Pennington, in Art Unit 1633 and Tech Center 1600, has 66 resolved cases. The allowance rate is 31.8 percent, and the median days to allowance is 1514. These figures indicate a challenging prosecution environment with a lengthy duration for successful cases. The 1514 median days to allowance provides a specific expectation for the timeline of an allowance.

An interview lift of 58.8 percent is a critical data point for applicants. This suggests that while the base allowance rate of 31.8 percent is low, conducting an interview dramatically increases the likelihood of success. The 58.8 percent lift indicates that direct dialogue is a highly effective method for resolving issues. Practitioners should prioritize interviews as a primary tactical move.

Top companies include University of Florida Research Foundation Inc., The Regents of the University of California, and Medizinische Hochschule Hannover. Firms like GREER, BURNS & CRAIN, LTD, BIRCH STEWART KOLASCH & BIRCH, LLP, and MARSHALL, GERSTEIN & BORUN LLP are frequently involved. The 66 resolved cases provide a basis for evaluating these trends.

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

Performance Statistics

31.8%
Allow Rate
-28.2% vs TC avg
135
Total Applications
+58.8%
Interview Lift
1514
Avg Prosecution Days
Based on 66 resolved cases, 2023–2026

Rejection Statute Breakdown

3.9%
§101 Eligibility
13.5%
§102 Novelty
41.1%
§103 Obviousness
29.9%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18580524 HUMAN IPSC-DERIVED MACROPHAGES FOR LIVER REPAIR AND REGENERATION Non-Final OA The Regents of the University of California
18270730 PROGRAMMABLE RNA EDITING IN VIVO VIA RECRUITMENT OF ENDOGENOUS ADARS Final Rejection The Regents of the University of California
18686799 INDUCED TOTIPOTENT STEM CELLS AND PREPARATION METHOD THEREFOR Non-Final OA TSINGHUA UNIVERSITY
17768146 MODIFIED STEM CELLS AND METHODS OF USE THEREOF Non-Final OA Arizona Board of Regents on behalf of the University of Arizona
17090706 N-Glycosylation Non-Final OA Danmarks Tekniske Universitet
18597181 SYSTEM COMPRISING CISPLATIN-RESISTANT XENOGRAFT FOR NASOPHARYNGEAL CARCINOMA AND METHODS THEREOF Non-Final OA THE UNIVERSITY OF HONG KONG

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Frequently Asked Questions

What is examiner Katie Leigh Pennington's allowance rate?

31.8% of resolved applications examined by Katie Leigh Pennington were allowed (66 resolved cases), compared with 34.8% across Art Unit 1633 over the last five years.

Does an interview help with examiner Katie Leigh Pennington?

This examiner's interview lift is +58.8 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Katie Leigh Pennington take to allow a patent?

Applications allowed by Katie Leigh Pennington took 1,514 days on average from filing to allowance.

Which art unit does examiner Katie Leigh Pennington work in?

Katie Leigh Pennington examines applications in Art Unit 1633 in Tech Center 1600 (Biotechnology & Pharmaceuticals).

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