Last updated: October 23, 2026

Tong Guo, USPTO Patent Examiner

Listed by the USPTO as GUO, TONG

Tech Center 1700 • Art Units: 1723 1783

This examiner grants 22% of resolved cases

Analysis

GUO, TONG is a USPTO patent examiner in tech center 1700 and art unit 1723. The profile covers 222 resolved cases, with an allowance rate of 21.6% and an interview lift of 25.3%. The median time to allowance is 1558 days. The allowance measure indicates a challenging recorded prosecution pattern, while the interview measure shows a positive association between interviews and allowance outcomes. The median timeline signals that applicants should plan for extended prosecution and preserve appropriate continuation or commercial flexibility.

The companies associated with the profile are The Procter & Gamble Company, Mitsubishi Chemical Corporation, and Japan Polyethylene Corporation. The firms are GREENBLUM & BERNSTEIN, P.L.C. and OBLON, MCCLELLAND, MAIER & NEUSTADT, L.L.P. The portfolio reflects consumer products and chemical materials. Practitioners may benefit from detailed claim charts, strong fallback positions, and early consideration of interviews. Technical explanations should connect each proposed amendment to concrete structure, process, or material distinctions.

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

Performance Statistics

21.6%

Allow Rate

-43.4% vs TC avg

226

Total Applications

+25.3%

Interview Lift

1558

Avg Prosecution Days

Based on 222 resolved cases, 2023–2026

Rejection Statute Breakdown

§101 Eligibility

10.1%

§102 Novelty

66.4%

§103 Obviousness

14.1%

§112 Clarity

Currently Pending Office Actions

App #	Title	Status	Assignee
18913075	BIODEGRADABLE CONTAINER WITH A PERSONAL CARE COMPOSITION	Non-Final OA	The Procter & Gamble Company
18721524	MASTERBATCH, PREFORM, BLOW-MOLDED BOTTLE, BEVERAGE PRODUCT, FILM, METHOD FOR PRODUCING PREFORM, AND METHOD FOR PRODUCING BLOW-MOLDED BOTTLE	Non-Final OA	MITSUBISHI CHEMICAL CORPORATION

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Frequently Asked Questions

What is examiner Tong Guo's allowance rate?

21.6% of resolved applications examined by Tong Guo were allowed (222 resolved cases), compared with 60.0% across Art Unit 1723 over the last five years.

Does an interview help with examiner Tong Guo?

This examiner's interview lift is +25.3 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Tong Guo take to allow a patent?

Applications allowed by Tong Guo took 1,558 days on average from filing to allowance.

Which art unit does examiner Tong Guo work in?

Tong Guo examines applications in Art Unit 1723 in Tech Center 1700 (Chemistry & Materials).