Prosecution Insights
Last updated: October 27, 2026

Estella M Gustilo, USPTO Patent Examiner

Listed by the USPTO as GUSTILO, ESTELLA M

Tech Center 1600 • Art Units: 1644 1646

This examiner grants 54% of resolved cases

Analysis

Estella M Gustilo operates in Tech Center 1600 and Art Unit 1644 with 69 resolved cases. The allowance rate pct is 53.6%, and the median days to allowance is 1279. This examiner has a moderate allowance rate pct of 53.6% and a longer timeline of 1279 median days to allowance.

The interview lift pct of 34.5% is a significant factor for applicants, as it notably improves the chances of success. Janssen Pharmaceuticals Inc., Genentech Inc., and Eli Lilly and Company are the top companies. FISH & RICHARDSON P.C. (TC), Lathrop GPM LLP, and COOLEY LLP are the primary firms. The 69 resolved cases and 34.5% interview lift pct suggest that interviews are a highly effective tool in this art unit.

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

Performance Statistics

53.6%
Allow Rate
-6.4% vs TC avg
114
Total Applications
+34.5%
Interview Lift
1279
Avg Prosecution Days
Based on 69 resolved cases, 2023–2026

Rejection Statute Breakdown

4.5%
§101 Eligibility
14.7%
§102 Novelty
29.7%
§103 Obviousness
27.3%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18799503 THERAPEUTIC AND DIAGNOSTIC METHODS FOR BLADDER CANCER Non-Final OA Genentech, Inc.
18416031 Anti-Jagged1 Antibodies and Methods of Use Non-Final OA Genentech, Inc.
17284284 EXTRACELLULAR VESICLES FOR TARGETED THERAPIES AGAINST MYELOID-DERIVED SUPPRESSOR CELLS Final Rejection Ohio State Innovation Foundation
18818268 ANTIBODIES WITH FC MODIFICATIONS AND METHODS OF USING THE SAME Final Rejection The General Hospital Corporation
18695945 PEANUT ALLERGY EPITOPE Non-Final OA Vanderbilt University
18453098 FCRN BINDING POLYPEPTIDES Non-Final OA THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS
17818854 METHODS OF INCREASING RESPONSE TO CANCER RADIATION THERAPY Non-Final OA The Trustees of the University of Pennsylvania
16521430 T CELL RECEPTORS DIRECTED AGAINST THE PREFERENTIALLY EXPRESSED ANTIGEN OF MELANOMA AND USES THEREOF Non-Final OA Academisch Ziekenhuis Leiden (h.o.d.n. LUMC)

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Frequently Asked Questions

What is examiner Estella M Gustilo's allowance rate?

53.6% of resolved applications examined by Estella M Gustilo were allowed (69 resolved cases), compared with 35.9% across Art Unit 1644 over the last five years.

Does an interview help with examiner Estella M Gustilo?

This examiner's interview lift is +34.5 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Estella M Gustilo take to allow a patent?

Applications allowed by Estella M Gustilo took 1,279 days on average from filing to allowance.

Which art unit does examiner Estella M Gustilo work in?

Estella M Gustilo examines applications in Art Unit 1644 in Tech Center 1600 (Biotechnology & Pharmaceuticals).

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