Prosecution Insights
Last updated: October 26, 2026

Dongxiu Zhang Spiering, USPTO Patent Examiner

Listed by the USPTO as ZHANG SPIERING, DONGXIU

Tech Center 1600 • Art Units: 1616

This examiner grants 41% of resolved cases

Analysis

ZHANG SPIERING, DONGXIU has resolved 34 cases in Tech Center 1600 and Art Unit 1616. The allowance rate is 41.2%, while the interview lift is 65.2%. The median time to allowance is 1241 days. Although the resolved-case record is limited, the interview figure is notably prominent within the available profile and supports considering examiner interviews early in case planning.

The listed companies are Massachusetts Institute of Technology, Cg Bio Co. Ltd., and Syngenta AG. The leading firms are BakerHostetler, GOODWIN PROCTER LLP, and OBLON, MCCLELLAND, MAIER & NEUSTADT, L.L.P. These names identify relevant institutional, corporate, and counsel experience, while the small record calls for restraint in generalizing from the metrics.

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

Performance Statistics

41.2%
Allow Rate
-18.8% vs TC avg
110
Total Applications
+65.2%
Interview Lift
1241
Avg Prosecution Days
Based on 34 resolved cases, 2023–2026

Rejection Statute Breakdown

2.9%
§101 Eligibility
13.5%
§102 Novelty
43.0%
§103 Obviousness
27.7%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18421666 EX-VIVO CULTURE SYSTEM AND METHODS OF USING SAME Non-Final OA Yeda Research and Development Co. Ltd.
18288205 Hair Relaxer Final Rejection BASF SE
16972220 PESTICIDALLY ACTIVE HETEROCYCLIC DERIVATIVES WITH SULFOXIMINE CONTAINING SUBSTITUENTS Final Rejection SYNGENTA CROP PROTECTION AG
18251509 AGROCHEMICAL COMPOSITION WITH IMPROVED DRIFT, SPREADING AND UPTAKE PROPERTIES Non-Final OA Bayer Aktiengesellschaft
18247527 Composition for Treating Hair and Skin Non-Final OA DR. KURT WOLFF GMBH & CO. KG
18566724 COSMETIC CONCENTRATE IN THE FORM OF A FILM Non-Final OA BEIERSDORF AG
18254805 LIQUID PESTICIDAL COMPOSITION Non-Final OA SUMITOMO CHEMICAL COMPANY, LIMITED
18570401 NOVALURON SOLID COMPOSITION Non-Final OA Adama Makhteshim Ltd.

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Frequently Asked Questions

What is examiner Dongxiu Zhang Spiering's allowance rate?

41.2% of resolved applications examined by Dongxiu Zhang Spiering were allowed (34 resolved cases), compared with 24.5% across Art Unit 1616 over the last five years.

Does an interview help with examiner Dongxiu Zhang Spiering?

This examiner's interview lift is +65.2 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Dongxiu Zhang Spiering take to allow a patent?

Applications allowed by Dongxiu Zhang Spiering took 1,241 days on average from filing to allowance.

Which art unit does examiner Dongxiu Zhang Spiering work in?

Dongxiu Zhang Spiering examines applications in Art Unit 1616 in Tech Center 1600 (Biotechnology & Pharmaceuticals).

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