Prosecution Insights
Last updated: October 02, 2026

Examiner: CARTER, SANDRA DILLAHUNT

Tech Center 1600 • Art Units: 1646 1674 1699

This examiner grants 56% of resolved cases

Analysis

Sandra Dillahunt Carter is an examiner in Tech Center 1600 and Art Unit 1646. She has resolved 527 cases with an allowance rate of 56.2 percent. This rate indicates a balanced prosecution environment where a grant is achieved in a portion of cases. The 527 resolved cases offer a dataset for understanding the examiner's approach.

The interview lift is 29.0 percent, which is an increase over the 56.2 percent baseline. This suggests that interviews are effective at moving cases toward allowance. Practitioners should prioritize direct communication to leverage this 29.0 percent lift. The data implies that verbal discussion is a successful method for resolving issues that might otherwise lead to a rejection.

The median days to allowance is 1277. This figure represents the timeframe for reaching a positive conclusion in prosecution. While the 56.2 percent allowance rate is moderate, the 1277-day duration indicates that the process requires persistence. The 29.0 percent lift is a tool for applicants to use during this 1277-day period to improve their chances of success.

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

Performance Statistics

56.2%
Allow Rate
-3.8% vs TC avg
561
Total Applications
+29.0%
Interview Lift
1277
Avg Prosecution Days
Based on 527 resolved cases, 2023–2026

Rejection Statute Breakdown

8.9%
§101 Eligibility
11.7%
§102 Novelty
21.6%
§103 Obviousness
39.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18497169 MULTI-CHAIN CHIMERIC POLYPEPTIDES AND USES THEREOF Non-Final OA ImmunityBio, Inc.
18628097 METHODS OF TREATING NON-RADIOGRAPHIC AXIAL SPONDYLOARTHRITIS USING INTERLEUKIN-17 (IL-17) ANTAGONISTS Non-Final OA Novartis AG
17920942 CD25-TARGETED IL-2 FOR INCREASING CD4 T CELL FORMATION AND TREATMENT OF INFECTIONS Final Rejection UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC.
18246604 METHODS AND COMPOSITIONS FOR IN SITU IMMUNE PROFILING OF HEART TRANSPLANT BIOPSIES Non-Final OA THE TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA
17563392 COMPOSITIONS, COMPRISING IMPROVED IL-12 GENETIC CONSTRUCTS AND VACCINES, IMMUNOTHERAPEUTICS AND METHODS OF USING THE SAME Final Rejection The Trustees of the University of Pennsylvania
18000226 ISOLATED PEPTIDE FOR A PEPTIDE COACERVATE, AND METHODS OF USE THEREOF Non-Final OA NANYANG TECHNOLOGICAL UNIVERSITY
17908415 PROTEIN NANOPARTICLE DESIGN AND APPLICATION Final Rejection Duke University
18057709 COMPOSITIONS OF ENGINEERED EXOSOMES AND METHODS OF LOADING LUMINAL EXOSOMES PAY-LOADS Non-Final OA LONZA SALES AG
18706716 PEPTIDE HAVING PHYSIOLOGICAL ACTIVITY AND USE THEREOF Non-Final OA CAREGEN CO., LTD.
17815194 IL-18-FC FUSION PROTEINS Non-Final OA Xencor, Inc.

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