Prosecution Insights
Last updated: October 25, 2026

Misook Yu, USPTO Patent Examiner

Listed by the USPTO as YU, MISOOK

Tech Center 1600 • Art Units: 1600 1641 1642

This examiner grants 39% of resolved cases

Analysis

YU, MISOOK examines in Tech Center 1600, Art Unit 1600. The profile includes 237 resolved cases and shows a 39.2% allowance rate. Interviews are associated with an 18.0% lift in allowance outcomes. The median days to allowance are 4540, making prosecution timing a central planning issue.

The listed company is Cytotheryx Inc., and the listed firm is BOZICEVIC, FIELD & FRANCIS LLP. The allowance result supports careful claim construction, evidence development, and amendment planning. The interview measure provides a reason to consider examiner engagement, but the extended median timing means that applicants should address procedural options and business deadlines early.

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

Performance Statistics

39.2%
Allow Rate
-20.8% vs TC avg
243
Total Applications
+18.0%
Interview Lift
4540
Avg Prosecution Days
Based on 237 resolved cases, 2023–2026

Rejection Statute Breakdown

3.3%
§101 Eligibility
24.8%
§102 Novelty
32.6%
§103 Obviousness
26.2%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18362410 IMMUNOMODULATORY PROTEINS AND RELATED METHODS Non-Final OA Flagship Pioneering Innovations VII, LLC
18274152 Genetically Modified Hepatocyte Populations Non-Final OA Cytotheryx, Inc.

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Frequently Asked Questions

What is examiner Misook Yu's allowance rate?

39.2% of resolved applications examined by Misook Yu were allowed (237 resolved cases), compared with 37.3% across Art Unit 1600 over the last five years.

Does an interview help with examiner Misook Yu?

This examiner's interview lift is +18.0 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Misook Yu take to allow a patent?

Applications allowed by Misook Yu took 4,540 days on average from filing to allowance.

Which art unit does examiner Misook Yu work in?

Misook Yu examines applications in Art Unit 1600 in Tech Center 1600 (Biotechnology & Pharmaceuticals).

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