Prosecution Insights
Last updated: October 25, 2026

USPTO Art Unit 1642: Examiners and Allowance Rates

31 examiners • 13 with pending office actions • Biotechnology & Pharmaceuticals (Tech Center 1600)

Art unit baseline (last 5 years, 4,733 dispositions): 39% allowance rate • 5.2 office actions per allowance • 1,228 days median pendency
ExaminerAllowance rateResolved casesPending apps
Maureen Varina Driscoll100.0%10
Rei Tsang Shiao100.0%10
Adam M Weidner100.0%10
Peter N. Johansen100.0%10
Nianxiang Zou100.0%10
Jon E Angell100.0%10
Samira Jm Jean-Louis90.1%1115
Yie Chia Lee71.1%3824
Lisa V Cook68.7%32616
Nelson B Moseley II67.9%62928
Yan Xiao67.3%77027
Julie Zhen Qin Wu64.2%2650
Josephine Kebbeh Darpolor62.1%293
Brandon J Fetterolf60.7%1070
Lei Yao59.7%8544
Kauser M Akhoon59.5%2050
Sarah Abdoalatif Alsomairy59.2%710
Alyssa Rae Stonebraker58.6%11136
Karl J Puttlitz58.5%3660
Dennis John Sullivan57.6%11831
Sean E Aeder57.0%1,43465
Anne L Holleran56.0%1160
Cheng Lu53.8%22150
Laura B Goddard50.8%1,28446
Peter J Reddig50.3%7570
Minh Tam B Davis49.2%650
Mark Halvorson35.8%6090
Michael D Allen28.4%4500
Misook Yu13.1%1530
Docket Central0.0%10
Jessica Marie Priest—020

Frequently Asked Questions

What is the allowance rate in USPTO Art Unit 1642?

38.5% over the last five years, across 4,733 resolved applications.

Which examiners in Art Unit 1642 have the highest allowance rates?

Among examiners with at least 30 resolved applications: Samira Jm Jean-Louis (90.1%, 111 resolved), Yie Chia Lee (71.1%, 38 resolved), Lisa V Cook (68.7%, 326 resolved).

Which examiners in Art Unit 1642 have the lowest allowance rates?

Among examiners with at least 30 resolved applications: Misook Yu (13.1%, 153 resolved), Michael D Allen (28.4%, 450 resolved), Mark Halvorson (35.8%, 609 resolved).

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