Prosecution Insights
Last updated: October 27, 2026

Sun Jae Yoo, USPTO Patent Examiner

Listed by the USPTO as YOO, SUN JAE

Tech Center 1600 • Art Units: 1621 1622 1626 1647 1674

This examiner grants 71% of resolved cases

Analysis

YOO, SUN JAE is assigned to tech center 1600 and art unit 1621. The profile covers 1241 resolved cases, with an allowance rate of 71.2% and a median of 995 days to allowance. The interview lift is 0.3%, indicating little association between interviews and allowance outcomes.

BASF, Kuleon, and Spero Therapeutics are the listed companies. The listed firms are Culhane Meadows PLLC, GREENBERG TRAURIG, LLP (BOS), and MARSHALL, GERSTEIN & BORUN LLP. The record supports relying primarily on clear written prosecution, with interviews used when they address a specific unresolved issue.

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

Performance Statistics

71.2%
Allow Rate
+11.2% vs TC avg
1,320
Total Applications
+0.3%
Interview Lift
995
Avg Prosecution Days
Based on 1241 resolved cases, 2023–2026

Rejection Statute Breakdown

1.1%
§101 Eligibility
27.7%
§102 Novelty
17.0%
§103 Obviousness
33.9%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18399092 6-PHENYL-4,5-DIHYDROPYRIDAZIN-3(2H)-ONE DERIVATIVES AS PDE3A AND PDE3B INHIBITORS FOR TREATING CANCER Non-Final OA Dana-Farber Cancer Institute, Inc.
17995874 CRYSTALLINE FORMS OF AN APOPTOSIS-INDUCING AGENT Non-Final OA AbbVie Inc.
18584311 SODIUM CHANNEL INHIBITORS AND METHODS OF DESIGNING SAME Non-Final OA Genentech, Inc.
18293003 (3-PIRYDYL)-QUINAZOLINE Non-Final OA BASF SE
18272673 SYNTHESIS OF POLYFLUORINATED ARYL AND HETEROARYL CARBOXAMIDES Non-Final OA BASF SE
18697706 INHIBITORS OF ALPHA-5 BETA-1 INTEGRIN AND USES THEREOF Non-Final OA The Regents of the University of California
17912485 SELECTIVE NON-CYCLIC NUCLEOTIDE ACTIVATORS FOR THE CAMP SENSOR EPAC1 Final Rejection The Board of Regents of The University of Texas System
18564748 COMPOUNDS FOR THE TREATMENT OF SARS Non-Final OA Purdue Research Foundation
18684225 Amorphous Form of (S)-2-(5-((3-Ethoxypyridin-2-YL)Oxy)Pyridin-3-YL)-N-(Tetrahydrofuran-3-YL)Pyrimidine-5-Carboxamide Non-Final OA Pfizer Inc.
18296538 ORGANIC ELECTROLUMINESCENT COMPOUND AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME Non-Final OA ROHM AND HAAS ELECTRONIC MATERIALS KOREA LTD.

Facing This Examiner?

IP Author analyzes examiner patterns and generates tailored response strategies with the highest chance of allowance.

Build Your Strategy

Who Appears Before This Examiner

Top companies before this examiner

Law firms appearing most often

Frequently Asked Questions

What is examiner Sun Jae Yoo's allowance rate?

71.2% of resolved applications examined by Sun Jae Yoo were allowed (1,241 resolved cases), compared with 46.0% across Art Unit 1621 over the last five years.

Does an interview help with examiner Sun Jae Yoo?

This examiner's interview lift is +0.3 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Sun Jae Yoo take to allow a patent?

Applications allowed by Sun Jae Yoo took 995 days on average from filing to allowance.

Which art unit does examiner Sun Jae Yoo work in?

Sun Jae Yoo examines applications in Art Unit 1621 in Tech Center 1600 (Biotechnology & Pharmaceuticals).

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month