Prosecution Insights
Last updated: October 04, 2026

Examiner: EREZO, DARWIN P

Tech Center 3700 • Art Units: 3731 3734 3771 3773

This examiner grants 55% of resolved cases

Analysis

Darwin P. Erezo has 294 resolved cases in Tech Center 3700 and Art Unit 3731. His allowance rate is 54.8 percent. The median time to allowance is 1841 days, which is a significant duration for prosecution. This 1841 days figure is a long pendency period, requiring patience from applicants.

The interview lift is 28.8 percent. This suggests that interviews are a productive way to advance cases and increase the likelihood of an allowance. Given the long median pendency of 1841 days, the 28.8 percent lift provides a strong reason to use interviews to resolve issues more effectively. For the 294 resolved cases, the 54.8 percent allowance rate serves as a moderate baseline. The 28.8 percent lift indicates that oral advocacy is a key factor in overcoming the challenges that lead to long prosecution times. Practitioners should prioritize interviews to improve their 54.8 percent odds of success.

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

Performance Statistics

54.8%
Allow Rate
-15.2% vs TC avg
296
Total Applications
+28.8%
Interview Lift
1841
Avg Prosecution Days
Based on 294 resolved cases, 2023–2026

Rejection Statute Breakdown

1.2%
§101 Eligibility
26.1%
§102 Novelty
47.5%
§103 Obviousness
13.9%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18896702 MAGNETIC STENT SYSTEM FOR PREVENTION OF STENT MIGRATION Non-Final OA THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
18561684 Vascular Prosthesis With Drawn Filled Tubes Final Rejection MicroVention, Inc.
18333424 IMPLANTS, SYSTEMS, AND METHODS FOR VASCULAR TREATMENT Non-Final OA Balt USA, LLC

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