Prosecution Insights
Last updated: October 26, 2026

Rei Tsang Shiao, USPTO Patent Examiner

Listed by the USPTO as SHIAO, REI TSANG

Tech Center 1600 • Art Units: 1614 1626 1628 1629 1642 1691

This examiner grants 80% of resolved cases

Performance Statistics

79.9%
Allow Rate
+19.9% vs TC avg
2,124
Total Applications
-33.5%
Interview Lift
761
Avg Prosecution Days
Based on 2073 resolved cases, 2023–2026

Rejection Statute Breakdown

2.0%
§101 Eligibility
8.8%
§102 Novelty
29.2%
§103 Obviousness
30.0%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18849133 THERAPEUTIC OR PROPHYLACTIC MEDICINE FOR FRAGILE X SYNDROME Non-Final OA Kyoto University
18864465 USE OF A POLYCARBOXYLATE COPOLYMER AND ALKYL ETHER SULFATE AS COMPATIBILIZER IN TANK MIX COMPOSITION Non-Final OA SPECIALTY OPERATIONS FRANCE

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Frequently Asked Questions

What is examiner Rei Tsang Shiao's allowance rate?

79.9% of resolved applications examined by Rei Tsang Shiao were allowed (2,073 resolved cases), compared with 47.9% across Art Unit 1614 over the last five years.

Does an interview help with examiner Rei Tsang Shiao?

This examiner's interview lift is -33.5 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Rei Tsang Shiao take to allow a patent?

Applications allowed by Rei Tsang Shiao took 761 days on average from filing to allowance.

Which art unit does examiner Rei Tsang Shiao work in?

Rei Tsang Shiao examines applications in Art Unit 1614 in Tech Center 1600 (Biotechnology & Pharmaceuticals).

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