Prosecution Insights
Last updated: October 27, 2026

Ann J Lo, USPTO Patent Examiner

Listed by the USPTO as LO, ANN J

Tech Center 2100 • Art Units: 2100 2125 2126 2128 2131 2141 2145 2147 2148 2154

This examiner grants 47% of resolved cases

Analysis

LO, ANN J is assigned to Tech Center 2100 and Art Unit 2100. The record contains 234 resolved cases, with a 46.6% allowance rate and a median of 1681 days to allowance. Interview lift is 26.1%, making interview practice a potentially meaningful consideration when planning prosecution before this examiner.

Reported company matters include Siemens Healthineers AG, Yahoo Assets LLC, and The Florida State University Research Foundation Inc. Meunier Carlin & Curfman LLC is the listed firm. The combination of a moderate allowance rate, positive interview lift, and extended median timing suggests that applicants may benefit from early issue identification and deliberate interview preparation.

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

Performance Statistics

46.6%
Allow Rate
-8.4% vs TC avg
243
Total Applications
+26.1%
Interview Lift
1681
Avg Prosecution Days
Based on 234 resolved cases, 2023–2026

Rejection Statute Breakdown

14.3%
§101 Eligibility
23.2%
§102 Novelty
38.2%
§103 Obviousness
21.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
17652288 VIABILITY DETERMINATION WITH SELF-ATTENTION FOR PROCESS OPTIMIZATION Final Rejection Siemens Healthineers AG
15237970 METHOD AND SYSTEM FOR MULTI-LABEL PREDICTION Final Rejection YAHOO ASSETS LLC

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Frequently Asked Questions

What is examiner Ann J Lo's allowance rate?

46.6% of resolved applications examined by Ann J Lo were allowed (234 resolved cases), compared with 38.8% across Art Unit 2100 over the last five years.

Does an interview help with examiner Ann J Lo?

This examiner's interview lift is +26.1 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Ann J Lo take to allow a patent?

Applications allowed by Ann J Lo took 1,681 days on average from filing to allowance.

Which art unit does examiner Ann J Lo work in?

Ann J Lo examines applications in Art Unit 2100 in Tech Center 2100 (Computing & Software).

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