Prosecution Insights
Last updated: October 26, 2026

Constantina E Stavrou, USPTO Patent Examiner

Listed by the USPTO as STAVROU, CONSTANTINA E

Tech Center 1600 • Art Units: 1632 1678

This examiner grants 42% of resolved cases

Analysis

STAVROU, CONSTANTINA E is assigned to USPTO Technology Center 1600, Art Unit 1632. The profile reports 92 resolved cases, an allowance rate of 42.4%, and a median of 1432 days to allowance. Interview lift is 35.6%, a substantial associated improvement in a record with low allowance performance and extended timing.

The leading companies are University Health Network, The Brigham and Women's Hospital Inc., and Novartis AG. The leading firms are WC&F IP, Xsensus, and Adler Pollock & Sheehan P.C. Practitioners should consider interviews carefully while preparing applicants for a prolonged prosecution path and a mixed allowance environment.

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

Performance Statistics

42.4%
Allow Rate
-17.6% vs TC avg
170
Total Applications
+35.6%
Interview Lift
1432
Avg Prosecution Days
Based on 92 resolved cases, 2023–2026

Rejection Statute Breakdown

3.3%
§101 Eligibility
20.5%
§102 Novelty
43.2%
§103 Obviousness
30.3%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18572723 ADENO-ASSOCIATED VIRAL (AAV) VECTORS FOR TISSUE-TARGETED EXPRESSION OF THERAPEUTIC GENES Non-Final OA The Brigham and Women's Hospital, Inc.
18042040 PROCESS SYSTEM FOR BIOREACTOR-BASED CLEAN MEAT PRODUCTION Final Rejection Merck Patent GmbH
18685660 METHODS FOR PRODUCTION OF ENGINEERED CELLS Non-Final OA Centre National de la Recherche Scientifique
17282117 MODULAR BIOFABRICATION PLATFORM FOR DIVERSE TISSUE ENGINEERING APPLICATIONS AND RELATED METHOD THEREOF Non-Final OA University of Virginia Patent Foundation
18314803 CARTILAGE-DERIVED PROGENITOR CELL LINES Final Rejection Rhode Island Hospital
17603661 BIRTH TISSUE-DERIVED PRODUCTS AND PREPARATION AND USES THEREOF Final Rejection LifeNet Health

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Frequently Asked Questions

What is examiner Constantina E Stavrou's allowance rate?

42.4% of resolved applications examined by Constantina E Stavrou were allowed (92 resolved cases), compared with 38.1% across Art Unit 1632 over the last five years.

Does an interview help with examiner Constantina E Stavrou?

This examiner's interview lift is +35.6 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Constantina E Stavrou take to allow a patent?

Applications allowed by Constantina E Stavrou took 1,432 days on average from filing to allowance.

Which art unit does examiner Constantina E Stavrou work in?

Constantina E Stavrou examines applications in Art Unit 1632 in Tech Center 1600 (Biotechnology & Pharmaceuticals).

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