Prosecution Insights
Last updated: October 02, 2026

Examiner: STAVROU, CONSTANTINA E

Tech Center 1600 • Art Units: 1632 1678

This examiner grants 44% of resolved cases

Analysis

Constantina E. Stavrou is an examiner in Art Unit 1632 of Tech Center 1600, with 87 resolved cases. Her allowance rate is 43.7%, and the median days to allowance is 1434. These figures suggest a thorough examination process that often takes several years to reach a conclusion. The 87 resolved cases provide a baseline for expectations regarding the timeline and success probability in Tech Center 1600.

The interview lift of 36.9% indicates that direct communication is a valuable strategy for applicants. By engaging in an interview, practitioners may significantly improve their chances of success beyond the 43.7% baseline, making it a recommended tactic for this examiner. The 36.9% lift shows that verbal dialogue is effective in resolving the complex issues often found in Art Unit 1632. Applicants should factor the 1434 median days to allowance into their long-term planning, using interviews as a tool to advance prosecution and potentially reach a grant more efficiently.

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

Performance Statistics

43.7%
Allow Rate
-16.3% vs TC avg
167
Total Applications
+36.9%
Interview Lift
1434
Avg Prosecution Days
Based on 87 resolved cases, 2023–2026

Rejection Statute Breakdown

3.0%
§101 Eligibility
19.6%
§102 Novelty
46.4%
§103 Obviousness
28.5%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18042040 PROCESS SYSTEM FOR BIOREACTOR-BASED CLEAN MEAT PRODUCTION Final Rejection Merck Patent GmbH
16707681 PRE-SHAPED ALLOGRAFT IMPLANT FOR RECONSTRUCTIVE SURGICAL USE AND METHODS OF MANUFACTURE AND USE Non-Final OA Allosource
19357552 DUAL-SPECIFIC BINDING MOLECULE USEFUL FOR ISOLATING SPECIFIC BLOOD CELLS Final Rejection ImmunityBio, Inc.
17545416 METHODS FOR CONTROLLED INDUCTION OF BIOENGINEERED NEUROEPITHELIAL TISSUES AND 3-D NEUROEPITHELIAL TUBES Non-Final OA Wisconsin Alumni Research Foundation
17928355 CRISPR-ASSOCIATED TRANSPOSASE SYSTEMS AND METHODS OF USE THEREOF Final Rejection MASSACHUSETTS INSTITUTE OF TECHNOLOGY
18490714 METHOD FOR ISOLATING HUMAN DERMAL FIBROBLASTS Final Rejection KING'S COLLEGE LONDON
18690594 SALMONELLA ENGINEERED FOR NONTOXIC COLONIZATION OF TUMORS Non-Final OA Regents of the University of Minnesota
18288345 VIRAL VECTOR PRODUCTION SYSTEM Non-Final OA Novartis AG
17282117 MODULAR BIOFABRICATION PLATFORM FOR DIVERSE TISSUE ENGINEERING APPLICATIONS AND RELATED METHOD THEREOF Non-Final OA University of Virginia Patent Foundation
17474178 VITRO ASSAY FOR DRUG DISCOVERY OF VALVULAR HEART DISEASE Final Rejection UNIVERSITY OF SOUTH CAROLINA
18023289 COMPOSITIONS AND METHODS FOR GENERATING HUMAN YOLK SAC-LIKE HEMATOPOIETIC CELLS Final Rejection UNIVERSITY HEALTH NETWORK
17057130 METHODS AND COMPOSITIONS COMPRISING TANKYRASE INHIBITORS FOR GENERATING INSULIN PRODUCING CELLS Final Rejection UNIVERSITY HEALTH NETWORK
18572723 ADENO-ASSOCIATED VIRAL (AAV) VECTORS FOR TISSUE-TARGETED EXPRESSION OF THERAPEUTIC GENES Non-Final OA The Brigham and Women's Hospital, Inc.
17867335 COMPOSITIONS AND METHODS FOR GENERATION OF RETINAL GANGLION CELLS FROM INDUCIBLE PLURIPOTENT STEM CELLS FOR THE TREATMENT OF PROGRESSIVE OPTIC NEUROPATHIES, INCLUDING GLAUCOMA Non-Final OA THE TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA
18546761 Methods of Expanding Cholangiocytes Non-Final OA Cambridge Enterprise Limited
18575265 DNA ORIGAMI STRUCTURE AND PROTEIN NANOPORE CONSTRUCT Non-Final OA Illumina, Inc.
17931440 COMPOSITIONS OF INDUCED PLURIPOTENT STEM CELL-DERIVED CELLS AND METHODS OF USE THEREOF Final Rejection FUJIFILM Cellular Dynamics, Inc.
18248443 Method for Inducing Differentiated Cells Into Pluripotent Endoderm Stem Cells and Application Thereof Final Rejection CENTER FOR EXCELLENCE IN MOLECULAR CELL SCIENCE, CHINESE ACADEMY OF SCIENCES
17799870 Method for providing personalized cells with chimeric antigen receptors (CAR) against tumor microenvironment cells Non-Final OA Miltenyi Biotec B.V. & Co. KG
18562448 SECRETED SPLICING VARIANT OF KLOTHO FOR TREATING BONE DISORDERS Non-Final OA INSTITUCIÓ CATALANA DE RECERCA I ESTUDIS AVANÇATS

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