Prosecution Insights
Last updated: October 25, 2026

USPTO Art Unit 2138: Examiners and Allowance Rates

31 examiners • 13 with pending office actions • Computing & Software (Tech Center 2100)

Art unit baseline (last 5 years, 3,166 dispositions): 82% allowance rate • 3.4 office actions per allowance • 794 days median pendency
ExaminerAllowance rateResolved casesPending apps
Christopher D Birkhimer100.0%2816
Christian Joseph O'Connell100.0%90
Saqib Javaid Siddiqui100.0%10
Phung M Chung100.0%10
Stephen C Elmore98.4%630
Jae Un Yu98.2%21811
Pierre Miche Bataille96.4%8412
Jean C Edouard95.7%1400
Shawn X Gu93.8%4823
Than Vinh Nguyen93.3%53513
Hiep T Nguyen92.3%780
Hashem Farrokh90.9%26510
Denise Tran90.8%1410
Baboucarr Faal90.7%17223
Gary J Portka90.5%3270
Mohammad S Hasan89.8%1373
Hua Jasmine Song88.5%1040
Hong Chong Kim88.1%2610
Tracy C Chan86.1%2018
Tim T Vo86.0%433
Michael C Krofcheck84.8%46713
Kaushikkumar M Patel84.1%4789
William E Baughman82.8%2150
Patrick W Borges76.9%130
Janice Marie Girouard73.9%1888
Arpan P Savla65.0%1230
Andrew J Jung54.4%1250
John Francis Wojton51.0%510
Mano Padmanabhan0.0%90
Demetrios C Kerveros0.0%20
Dipakkumar B Gandhi0.0%10

Frequently Asked Questions

What is the allowance rate in USPTO Art Unit 2138?

81.9% over the last five years, across 3,166 resolved applications.

Which examiners in Art Unit 2138 have the highest allowance rates?

Among examiners with at least 30 resolved applications: Stephen C Elmore (98.4%, 63 resolved), Jae Un Yu (98.2%, 218 resolved), Pierre Miche Bataille (96.4%, 84 resolved).

Which examiners in Art Unit 2138 have the lowest allowance rates?

Among examiners with at least 30 resolved applications: John Francis Wojton (51.0%, 51 resolved), Andrew J Jung (54.4%, 125 resolved), Arpan P Savla (65.0%, 123 resolved).

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