Prosecution Insights
Last updated: October 08, 2026

USPTO Art Unit 1641: Examiners and Allowance Rates

53 examiners • 15 with pending office actions • Biotechnology & Pharmaceuticals (Tech Center 1600)

Art unit baseline (last 5 years, 2,984 dispositions): 45% allowance rate • 6.0 office actions per allowance • 1,333 days median pendency
ExaminerAllowance rateResolved casesPending apps
Thomas J Visone100.0%30
Karen M Williams100.0%10
Albert Angelo Serrano100.0%10
Alana Harris Dent100.0%10
Leah Elizabeth Stein100.0%11
Cy R Tamanaha100.0%10
James L Rogers94.0%500
Xiaoyan Nmn Zou90.0%100
Misook Yu86.7%833
Michael Edward Szperka85.1%28939
Phuong N Huynh81.0%39951
Nora Maureen Rooney78.5%24232
Yunsoo Kim78.5%24645
Sharon X Wen76.9%18621
Rebecca M Giere76.2%1930
Christopher L Chin75.6%3150
Maher M Haddad73.3%29237
James Lyle Mclellan72.7%110
Gailene Gabel69.9%3990
Marianne Dibrino69.9%16620
Lia Elan Taylor68.2%12933
Changhwa J Cheu67.1%5320
Alec Jon Peters66.7%4233
Mohammad Ali Al-Ameen66.7%30
Chun Wu Dahle64.3%15437
Nam P Nguyen64.3%1540
Grace Henry Lunde63.0%2712
Samantha Lake Hopkins61.8%5524
Ann Y Montgomery59.9%2790
Andrea S Grossman58.9%1120
Lisa V Cook58.6%1570
Melanie Yu Brown54.5%4240
Shafiqul Haq53.3%4280
Pensee T Do51.5%1690
Erik B Crawford51.3%1150
Galina M Yakovleva51.2%2480
Gary W Counts50.8%3640
Nelson C Yang50.6%2430
Richard P Moerschell45.5%1010
Jacqueline A Diramio45.2%620
Carmencita Belei42.3%1300
Gary E Hollinden40.4%470
Ellen Jean Marcsisin40.1%1370
Bao Thuy L Nguyen39.4%1750
Unsu Jung31.6%1140
Leon Yun Bon Lum31.2%480
James Leslie Grun30.8%1850
Christine E Foster23.2%2240
Daniela E Fuentes22.2%90
David J Venci16.7%60
Mark Lance Shibuya12.2%410
Hannah Louise Sunshine0.0%10
Alan Alfano—09

Frequently Asked Questions

What is the allowance rate in USPTO Art Unit 1641?

45.2% over the last five years, across 2,984 resolved applications.

Which examiners in Art Unit 1641 have the highest allowance rates?

Among examiners with at least 30 resolved applications: James L Rogers (94.0%, 50 resolved), Misook Yu (86.7%, 83 resolved), Michael Edward Szperka (85.1%, 289 resolved).

Which examiners in Art Unit 1641 have the lowest allowance rates?

Among examiners with at least 30 resolved applications: Mark Lance Shibuya (12.2%, 41 resolved), Christine E Foster (23.2%, 224 resolved), James Leslie Grun (30.8%, 185 resolved).

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