Prosecution Insights
Last updated: October 27, 2026

Tina Zhang, USPTO Patent Examiner

Listed by the USPTO as ZHANG, TINA

Tech Center 3700 • Art Units: 1755 3785

This examiner grants 56% of resolved cases

Analysis

ZHANG, TINA has resolved 98 cases in Tech Center 3700 and Art Unit 1755. The allowance rate is 56.1%, while the interview lift is 44.6%. The median time to allowance is 1283 days. The profile shows allowances in more than half of resolved cases and a substantial interview association, supporting attention to both examiner dialogue and the timing of amendments.

The listed companies are Koninklijke Philips N.V., Dcstar Inc., and Mallinckrodt Pharmaceuticals Ireland Limited. The leading firms are HSML P.C., Alley IP, and Bayramoglu Law Offices LLC. These portfolio connections can help practitioners identify relevant medical and technology prosecution experience, while the moderate case volume supports careful use of the metrics.

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

Performance Statistics

56.1%
Allow Rate
-13.9% vs TC avg
139
Total Applications
+44.6%
Interview Lift
1283
Avg Prosecution Days
Based on 98 resolved cases, 2023–2026

Rejection Statute Breakdown

5.2%
§101 Eligibility
10.8%
§102 Novelty
58.7%
§103 Obviousness
22.6%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18453742 METHODS AND APPARATUS FOR INCREASING BREATHING COMFORT DURING RESPIRATORY THERAPY Non-Final OA ResMed Pty Ltd
18677948 SYSTEM AND METHOD FOR CONTROLLING A SLEEP DISORDERED BREATHING THERAPY DEVICE Non-Final OA KONINKLIJKE PHILIPS N.V.
18534945 DETECTING, IDENTIFYING AND ALLEVIATING CAUSES FOR PRESSURE BURDEN USING POSITIVE AIRWAY PRESSURE DEVICES Non-Final OA KONINKLIJKE PHILIPS N.V.
18752318 PATIENT INTERFACE Non-Final OA Fisher & Paykel Healthcare Limited
18535444 HEADGEAR WITH LOCK DISENGAGEMENT MECHANISM Non-Final OA Fisher & Paykel Healthcare Limited
18548049 SYSTEM AND METHOD FOR CONTINUOUS ADJUSTMENT OF PERSONALIZED MASK SHAPE Final Rejection ResMed Sensor Technologies Limited
18290534 POWDER INHALATION DEVICE AND CONTROL METHOD THEREOF Non-Final OA KT&G CORPORATION

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Frequently Asked Questions

What is examiner Tina Zhang's allowance rate?

56.1% of resolved applications examined by Tina Zhang were allowed (98 resolved cases), compared with 43.0% across Art Unit 1755 over the last five years.

Does an interview help with examiner Tina Zhang?

This examiner's interview lift is +44.6 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Tina Zhang take to allow a patent?

Applications allowed by Tina Zhang took 1,283 days on average from filing to allowance.

Which art unit does examiner Tina Zhang work in?

Tina Zhang examines applications in Art Unit 1755 in Tech Center 3700 (Medical Devices & Mechanical Engineering).

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