Prosecution Insights
Last updated: October 25, 2026

USPTO Art Unit 2658: Examiners and Allowance Rates

35 examiners • 14 with pending office actions • Communications (Tech Center 2600)

Art unit baseline (last 5 years, 3,359 dispositions): 65% allowance rate • 4.4 office actions per allowance • 1,047 days median pendency
ExaminerAllowance rateResolved casesPending apps
Zhubing Ren100.0%212
Eunice Somin Lee100.0%10
Daniel Demelash Abebe100.0%10
Derrick S Jefferies100.0%10
Mulugeta Tuji Dugda100.0%10
Anup Chandora100.0%10
Quynh H Nguyen100.0%10
Mohammad K Islam95.4%650
Susan Iris Mcfadden92.4%6060
Eric L Yen90.1%6173
Vijay B Chawan89.0%7197
Martin Lerner86.2%1880
Talivaldis Ivars Smits86.0%430
Douglas Godbold83.9%5960
Leonard Saint Cyr83.3%93021
Michael N Opsasnick82.4%74024
Michael C Colucci81.3%4590
Adam Michael Weaver81.2%1618
Alexander G Marlow79.1%868
Ethan Daniel Kim77.4%1159
Mark Villena75.6%46314
Thuykhanh Le74.8%2140
Nadira Sultana74.3%350
Michelle M Koeth72.2%360
Olujimi A Adesanya70.6%58919
Bryan S Blankenagel67.0%39419
Ernest Langston Estes63.9%360
Michael Ortiz Sanchez61.4%2070
Greg Borsetti58.1%430
Zeeshan Mahmood Shaikh58.0%5010
Rodrigo A Chavez52.1%24215
Seong-Ah A Shin45.0%200
Richemond Dorvil40.7%599
Kee Young Lee34.6%260
John Hong Fang-Wu0.0%10

Frequently Asked Questions

What is the allowance rate in USPTO Art Unit 2658?

65.3% over the last five years, across 3,359 resolved applications.

Which examiners in Art Unit 2658 have the highest allowance rates?

Among examiners with at least 30 resolved applications: Mohammad K Islam (95.4%, 65 resolved), Susan Iris Mcfadden (92.4%, 606 resolved), Eric L Yen (90.1%, 617 resolved).

Which examiners in Art Unit 2658 have the lowest allowance rates?

Among examiners with at least 30 resolved applications: Richemond Dorvil (40.7%, 59 resolved), Rodrigo A Chavez (52.1%, 242 resolved), Zeeshan Mahmood Shaikh (58.0%, 50 resolved).

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