Prosecution Insights
Last updated: October 27, 2026

Zheng B Song, USPTO Patent Examiner

Listed by the USPTO as SONG, ZHENG B

Tech Center 2800 • Art Units: 2875 2885 2897

This examiner grants 70% of resolved cases

Analysis

SONG, ZHENG B is assigned to tech center 2800 and art unit 2875. The profile contains 786 resolved cases, a 70.1% allowance rate, and a median of 786 days to allowance. The case volume supports meaningful examiner-specific analysis, while the allowance rate indicates that successful outcomes occur in a majority of the observed matters.

Interviews are associated with a 15.0% lift in allowance rate, which supports considering interview practice in prosecution planning. Circadian Os Inc., CreeLED Inc., and Valeo S.A. are the principal companies shown. The leading firms are AMSTER, ROTHSTEIN & EBENSTEIN LLP, Anova Law Group PLLC, and CANTOR COLBURN LLP.

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

Performance Statistics

70.1%
Allow Rate
+2.1% vs TC avg
812
Total Applications
+15.0%
Interview Lift
786
Avg Prosecution Days
Based on 786 resolved cases, 2023–2026

Rejection Statute Breakdown

0.1%
§101 Eligibility
18.5%
§102 Novelty
61.4%
§103 Obviousness
17.2%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19429339 THERAPEUTIC ENVIRONMENT SENSING AND/OR ALTERING DEVICE Non-Final OA Circadian OS, Inc.
19108787 HIGH BEAM MODULE FOR A MOTOR VEHICLE, HAVING AN UPWARDLY DIRECTED LIGHT SOURCE Non-Final OA VALEO VISION
19481099 LUMINAIRE ASSEMBLY AND PACKING METHOD Non-Final OA SIGNIFY HOLDING B.V.
19481555 A SKIN STRUCTURE AND A FORMING METHOD THEREOF Non-Final OA Yanfeng International Automotive Technology Co. Ltd.
19371051 DISPLAY DEVICE HAVING A BACKGROUND ILLUMINATION AND MEANS OF TRANSPORTATION HAVING SUCH A DISPLAY DEVICE Final Rejection Continental Automotive Technologies GmbH
18924031 REFLECTIVE MEMBER, PLANAR LIGHT SOURCE, AND LIQUID CRYSTAL DISPLAY DEVICE Final Rejection NICHIA CORPORATION

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Frequently Asked Questions

What is examiner Zheng B Song's allowance rate?

70.1% of resolved applications examined by Zheng B Song were allowed (786 resolved cases), compared with 65.6% across Art Unit 2875 over the last five years.

Does an interview help with examiner Zheng B Song?

This examiner's interview lift is +15.0 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Zheng B Song take to allow a patent?

Applications allowed by Zheng B Song took 786 days on average from filing to allowance.

Which art unit does examiner Zheng B Song work in?

Zheng B Song examines applications in Art Unit 2875 in Tech Center 2800 (Semiconductors, Circuits & Optics).

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