Prosecution Insights
Last updated: October 26, 2026

April Ying Shan Blair, USPTO Patent Examiner

Listed by the USPTO as BLAIR, APRIL YING SHAN

Tech Center 2400 • Art Units: 2100 2111 2117 2126 2135 2141 2144 2187 2191 2194

This examiner grants 86% of resolved cases

Analysis

BLAIR, APRIL YING SHAN is assigned to Technology Center 2400 and art unit 2100. The profile records 217 resolved cases, with an allowance rate of 85.7%. Median time to allowance is 1419 days, and interview lift is 29.1%. The figures show a high allowance outcome alongside a measurable interview-associated increase.

The listed companies are Red Hat Inc., ARM Limited, and Ciena Corporation. The only listed firm is Guntin & Gust, PLC - CIENA. Practitioners handling matters in this profile can use the allowance history as a substantial reference point and may consider interviews a meaningful component of prosecution planning, while accounting for the extended median time to allowance.

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

Performance Statistics

85.7%
Allow Rate
+27.7% vs TC avg
243
Total Applications
+29.1%
Interview Lift
1419
Avg Prosecution Days
Based on 217 resolved cases, 2023–2026

Rejection Statute Breakdown

18.9%
§101 Eligibility
10.8%
§102 Novelty
42.4%
§103 Obviousness
22.2%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18306698 USING VIRTUAL MACHINE PRIVILEGE LEVELS TO CONTROL WRITE ACCESS TO KERNEL MEMORY IN A VIRTUAL MACHINE Non-Final OA Red Hat, Inc.

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Frequently Asked Questions

What is examiner April Ying Shan Blair's allowance rate?

85.7% of resolved applications examined by April Ying Shan Blair were allowed (217 resolved cases), compared with 38.8% across Art Unit 2100 over the last five years.

Does an interview help with examiner April Ying Shan Blair?

This examiner's interview lift is +29.1 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner April Ying Shan Blair take to allow a patent?

Applications allowed by April Ying Shan Blair took 1,419 days on average from filing to allowance.

Which art unit does examiner April Ying Shan Blair work in?

April Ying Shan Blair examines applications in Art Unit 2100 in Tech Center 2400 (Networking & Security).

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