Prosecution Insights
Last updated: October 02, 2026

Examiner: O'BRIEN, LEA S

Tech Center 1600 • Art Units: 1644 1646

This examiner grants 51% of resolved cases

Analysis

Lea S. O'Brien is an examiner in Art Unit 1644, which is part of Tech Center 1600. She has 35 resolved cases with an allowance rate of 51.4 percent. This indicates the prosecution environment where applications reach issuance. The data provides a view of her performance across 35 resolutions.

The interview lift for O'Brien is 13.9 percent. This positive metric suggests that applicants benefit from conducting interviews to address examiner concerns. Utilizing this 13.9 percent lift can be a strategic way to improve the 51.4 percent baseline allowance rate and move a case toward a conclusion.

The median days to allowance is 1220. This reflects the prosecution timeline in Tech Center 1600. Practitioners should plan for this process while keeping the 13.9 percent interview lift in mind to potentially streamline the path to allowance within this 1220 median days to allowance timeframe.

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

Performance Statistics

51.4%
Allow Rate
-8.6% vs TC avg
55
Total Applications
+13.9%
Interview Lift
1220
Avg Prosecution Days
Based on 35 resolved cases, 2023–2026

Rejection Statute Breakdown

5.2%
§101 Eligibility
10.4%
§102 Novelty
33.5%
§103 Obviousness
24.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18575949 PERSONALIZED VACCINE ADMINISTRATION Non-Final OA Daicel Corporation
17762685 NOTCH RECEPTORS WITH MINIMAL LINKER Final Rejection The Regents of the University of California
17421337 EX VIVO ACTIVATED T-LYMPHOCYTIC COMPOSITIONS AND METHODS OF USING THE SAME Non-Final OA CHILDREN'S NATIONAL MEDICAL CENTER
17428341 STABILIZED Fc FUSION PROTEIN SOLUTIONS Non-Final OA ARECOR LIMITED

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