Prosecution Insights
Last updated: October 02, 2026

Examiner: NESTOR, DONNA MICHELLE

Tech Center 1600 • Art Units: 1621 1622 1626 1627

This examiner grants 57% of resolved cases

Analysis

Donna Michelle Nestor serves in Tech Center 1600 and Art Unit 1621. The examiner has 83 resolved cases. The allowance rate is 56.6 percent, which represents the frequency of grants for applications reaching a final resolution.

The interview lift is 44.2 percent. This 44.2 percent figure indicates that interviews correlate with an increased probability of allowance. When considering the 83 resolved cases, the 44.2 percent lift suggests that direct communication is a beneficial tactic for practitioners. The 56.6 percent baseline allowance rate is a key metric for evaluating the prosecution environment.

The median days to allowance is 1161. This 1161-day timeline reflects the duration for successful applications to reach a grant. The 1161-day figure provides a benchmark for expected pendency in Art Unit 1621. Practitioners can use this 1161-day median and the 83 resolved cases to inform their strategy and manage expectations for the timing of a final outcome.

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

Performance Statistics

56.6%
Allow Rate
-3.4% vs TC avg
113
Total Applications
+44.2%
Interview Lift
1161
Avg Prosecution Days
Based on 83 resolved cases, 2023–2026

Rejection Statute Breakdown

2.5%
§101 Eligibility
14.8%
§102 Novelty
33.4%
§103 Obviousness
25.6%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
17623060 COMPOSITIONS AND METHODS OF TREATING LIVER CANCERS Final Rejection The Johns Hopkins University
18029982 MIXTURES CONTAINING CYCLOBUTRIFLURAM Final Rejection BASF SE
18294191 MICROBIOCIDAL PYRAZOLE DERIVATIVES Non-Final OA SYNGENTA CROP PROTECTION AG
18577851 CDK19-SELECTIVE INHIBITORS, AND METHODS OF USE THEREOF Final Rejection THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
18954506 USE OF INDOCYANINE GREEN IN ANTIBACTERIAL OR BACTERICIDAL APPLICATION Non-Final OA Buddhist Tzu Chi Medical Foundation
17995806 PI3 KINASE INHIBITORS AND USES THEREOF Final Rejection Purdue Research Foundation
18596363 TARGETED TREATMENT FOR SKIN FRAGILITY DISEASES Non-Final OA University of Washington
18665776 SYNTHESIS OF 2'-(7,7-dimethyl-1'H,7H-spiro[furo[3,4-b]pyridine-5,4'-piperidin]-1'-yl)-1,3-dihydro-4'H-spiro[indene-2,5'-[1,3]oxazol]-4'-one Non-Final OA Hoffmann-La Roche Inc.
18479596 PROCESSES FOR MAKING BICYCLIC KETONE COMPOUNDS Final Rejection Hoffmann-La Roche Inc.
18548716 COMPOUND AND RADIOACTIVE LABELING COMPOUND Final Rejection KYOTO UNIVERSITY
18262053 ARTEMISININ-PROTEASOME INHIBITOR CONJUGATES AND THEIR USE IN THE TREATMENT OF DISEASE Final Rejection CORNELL UNIVERSITY
18953578 IMIDAZ0[1,2-A]PYRIMIDINE-5(1 H)-ONES AS WRN INHIBITORS Non-Final OA Incyte Corporation
17867294 ARYLMETHOXY ISOINDOLINE DERIVATIVES AND COMPOSITIONS COMPRISING AND METHODS OF USING THE SAME Non-Final OA Celgene Corporation
17614826 METHODS OF ALTERING CARDIAC REMODELING USING COMPOUNDS THAT PROMOTE GLUCOSE OXIDATION Final Rejection IMBRIA PHARMACEUTICALS, INC.
17767018 NOVEL HETEROARYL-TRIAZOLE COMPOUNDS AS PESTICIDES Final Rejection Elanco Animal Health GmbH
18682647 SULFONAMIDE DERIVATIVE, PREPARATION METHOD THEREFOR AND MEDICAL USE THEREOF Non-Final OA Shanghai Hengrui Pharmaceutical Co., Ltd.
17769416 DIHYDROIMIDAZO PYRIMIDO PYRIMIDINONE COMPOUND Final Rejection IMPACT THERAPEUTICS (SHANGHAI), INC

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