Prosecution Insights
Last updated: October 26, 2026

Delphinus Dou Yi Yu, USPTO Patent Examiner

Listed by the USPTO as YU, DELPHINUS DOU YI

Tech Center 1600 • Art Units: 1631 1634 1636 1645 1651 1656

This examiner grants 33% of resolved cases

Analysis

YU, DELPHINUS DOU YI examines in Tech Center 1600, Art Unit 1631. The profile records 6 resolved cases, a 33.3% allowance rate, and a 0.0% interview lift. The median days to allowance are 1026.

The listed companies are Virginia Commonwealth University, Alnylam Pharmaceuticals Inc., and Editas Medicine Inc. The listed firms are BALLARD SPAHR LLP, MCCARTER & ENGLISH, LLP, and WC&F IP. The limited record gives little basis for generalized prosecution predictions. Practitioners should use the profile as background and base decisions on the particular claims, references, and response history.

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
47
Total Applications
+0.0%
Interview Lift
1026
Avg Prosecution Days
Based on 6 resolved cases, 2023–2026

Rejection Statute Breakdown

6.6%
§101 Eligibility
10.7%
§102 Novelty
33.6%
§103 Obviousness
36.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18452127 HIGH-THROUGHPUT METHODS FOR ANALYZING AND AFFINITY-MATURING AN ANTIGEN-BINDING MOLECULE Non-Final OA 10x Genomics, Inc.
17909341 Artificial Chromosome Vector and Use Thereof Final Rejection The University of Tokyo
18271631 GENETIC THERAPY FOR GLAUCOMA AND OPTIC NEUROPATHIES Final Rejection The United States Government as Represented by The Department of Veterans Affairs
18520481 PROTACS WITH TRANSCRIPTION FACTOR TARGETING MOIETIES Non-Final OA Icahn School of Medicine at Mount Sinai

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Frequently Asked Questions

What is examiner Delphinus Dou Yi Yu's allowance rate?

33.3% of resolved applications examined by Delphinus Dou Yi Yu were allowed (6 resolved cases), compared with 28.4% across Art Unit 1631 over the last five years.

Does an interview help with examiner Delphinus Dou Yi Yu?

This examiner's interview lift is +0.0 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Delphinus Dou Yi Yu take to allow a patent?

Applications allowed by Delphinus Dou Yi Yu took 1,026 days on average from filing to allowance.

Which art unit does examiner Delphinus Dou Yi Yu work in?

Delphinus Dou Yi Yu examines applications in Art Unit 1631 in Tech Center 1600 (Biotechnology & Pharmaceuticals).

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