Prosecution Insights
Last updated: October 02, 2026

Examiner: LIU, SUE XU

Tech Center 1600 • Art Units: 1616 1623 1639 1643 1645 1646 1653 1654

This examiner grants 21% of resolved cases

Analysis

Sue Xu Liu examines applications in Tech Center 1600 and Art Unit 1616, where they have handled 239 resolved cases. The allowance rate of 20.9 percent indicates a challenging environment for applicants, as a significant majority of cases do not result in a grant. However, the interview lift of 18.6 percent suggests that engaging in a dialogue with the examiner can increase the chances of success compared to the baseline rate.

The prosecution process is relatively lengthy, with a median of 1614 days to allowance. This 1614-day figure reflects the time often required to overcome rejections in this art unit. Practitioners should prepare for a rigorous examination process, given that the 20.9 percent allowance rate is notably low. The 18.6 percent interview lift should be viewed as a vital tactic for navigating these difficulties.

With 239 resolved cases, the examiner's statistics are well-defined. The 1614-day median to allowance serves as a critical planning metric for stakeholders. Because the allowance rate is 20.9 percent, applicants must be precise in their claim drafting and proactive in using interviews to leverage the 18.6 percent lift.

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

Performance Statistics

20.9%
Allow Rate
-39.1% vs TC avg
300
Total Applications
+18.6%
Interview Lift
1614
Avg Prosecution Days
Based on 239 resolved cases, 2023–2026

Rejection Statute Breakdown

2.4%
§101 Eligibility
14.6%
§102 Novelty
41.9%
§103 Obviousness
27.3%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18444007 SOLID ACID/ANIONIC ANTIMICROBIAL AND VIRUCIDAL COMPOSITIONS AND USES THEREOF Non-Final OA ECOLAB USA INC.
18555070 RETINOL FORMULATION (II) Non-Final OA DSM IP ASSETS B.V.
17814198 T CELLS EXPRESSING MEMBRANE-ANCHORED IL-12 FOR THE TREATMENT OF CANCER Non-Final OA Board of Regents, The University of Texas System
18569346 PHARMACEUTICAL FORMULATION CONTAINING AN ANTI-IgE ANTIBODY Non-Final OA NOVARTIS AG
18134993 COMPOSITIONS INCLUDING ENDOPHYTES FOR IMPROVING PLANT NUTRITION, GROWTH,AND PERFORMANCE AND METHODS OF USING THE SAME Non-Final OA University of Washington
18292078 MEDICAMENT FOR TREATMENT AND/OR PREVENTION OF CANCER Non-Final OA TORAY INDUSTRIES, INC.
17910522 MEDICAMENT FOR TREATMENT AND/OR PREVENTION OF CANCER Non-Final OA TORAY INDUSTRIES, INC.
17907313 INDUCING PRODUCTION OF ANTI-OLIGOMANNOSE ANTIBODIES Non-Final OA SRI International
17514305 METHODS FOR PRODUCING REDUCED CARBON FOOTPRINT LIVESTOCK Non-Final OA LOCUS SOLUTIONS IPCO, LLC
18204412 COMPLEX OF MUTUALISTIC MICROBES DESIGNED TO INCREASE PLANT PRODUCTIVITY Final Rejection UT-Battelle, LLC
18563440 ANTIBODIES Non-Final OA Oxford University Innovation Limited
18565805 CAR-T CELL THERAPY FOR TRIPLE NEGATIVE BREAST CANCER Non-Final OA H. LEE MOFFITT CANCER CENTER AND RESEARCH INSTITUTE, INC.
18224345 NON-PROTEIN PHENYLALANINE ANALOGUES FOR INHIBITING CYANOBACTERIA AND PLANT GROWTH Final Rejection YEDA RESEARCH AND DEVELOPMENT CO. LTD.
18750625 Compositions and Their Use for Pest Control and to Induce Plant Hormone and Gene Regulation for Improved Plant Production and Defense Non-Final OA Biodel AG Inc.
17123729 DUST FORMULATION COMPRISING A CARRIER TO WHICH ACTIVE INGREDIENTS ARE APPLIED VIA A SOLVENT Non-Final OA Discovery Purchaser Corporation

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