Prosecution Insights
Last updated: October 01, 2026

Examiner: YU, DELPHINUS DOU YI

Tech Center 1600 • Art Units: 1634 1636 1645 1651 1656

This examiner grants 33% of resolved cases

Analysis

Delphinus Dou Yi Yu works in Art Unit 1634 of Tech Center 1600. With 6 resolved cases, the examiner has an allowance rate of 33.3 percent. The median days to allowance is 1026. The 33.3 percent allowance rate suggests a challenging environment with a low probability of success for applicants in this unit.

The interview lift is 0.0 percent. These metrics, based on 6 resolved cases, indicate a pendency of 1026 days, which is nearly three years. The 0.0 percent interview lift indicates that interviews have not yet been shown to improve the probability of success for this examiner. Practitioners should focus on high-quality written responses to navigate the prosecution process. With 6 resolved cases, the data provides an initial look at the examiner's patterns. The 1026-day median pendency is a significant factor to consider when planning a strategy. Applicants should be aware that the 33.3 percent baseline is difficult to overcome through standard procedures. The zero lift suggests that verbal communication has not impacted outcomes.

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

Performance Statistics

33.3%
Allow Rate
-26.7% vs TC avg
36
Total Applications
+0.0%
Interview Lift
1026
Avg Prosecution Days
Based on 6 resolved cases, 2023–2026

Rejection Statute Breakdown

5.2%
§101 Eligibility
11.7%
§102 Novelty
34.4%
§103 Obviousness
33.8%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18474969 ADENOSINE DEAMINASE VARIANTS AND USES THEREOF Non-Final OA Beam Therapeutics Inc.
18452127 HIGH-THROUGHPUT METHODS FOR ANALYZING AND AFFINITY-MATURING AN ANTIGEN-BINDING MOLECULE Non-Final OA 10x Genomics, Inc.
18496554 Splicing Modulators for the Treatment of Timothy Syndrome Non-Final OA The Board of Trustees of the Leland Stanford Junior University
17909341 Artificial Chromosome Vector and Use Thereof Final Rejection The University of Tokyo
18254027 TRNA FRAGMENTS AND METHODS OF USE Non-Final OA Thomas Jefferson University
18525922 PATATIN-LIKE PHOSPHOLIPASE DOMAIN CONTAINING 3 (PNPLA3) iRNA COMPOSITIONS AND METHODS OF USE THEREOF Non-Final OA Alnylam Pharmaceuticals, Inc.
18236437 PRION PROTEIN (PRNP) IRNA COMPOSITIONS AND METHODS OF USE THEREOF Non-Final OA Alnylam Pharmaceuticals, Inc.
18570967 COMPOSITIONS AND METHODS FOR THE PREVENTION AND TREATMENT OF HEMOGLOBINOPATHIES Non-Final OA Duke University
18520481 PROTACS WITH TRANSCRIPTION FACTOR TARGETING MOIETIES Non-Final OA Icahn School of Medicine at Mount Sinai

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