Prosecution Insights
Last updated: October 25, 2026

USPTO Art Unit 2628: Examiners and Allowance Rates

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

Art unit baseline (last 5 years, 4,938 dispositions): 80% allowance rate • 3.0 office actions per allowance • 592 days median pendency
ExaminerAllowance rateResolved casesPending apps
Ibrahim A Khan100.0%286
James A Thompson100.0%90
Nghi V Tran100.0%30
Ke Xiao100.0%20
Dorothy H Harris100.0%10
Temesghen Ghebretinsae100.0%10
Haixia Du100.0%10
Amr A Awad100.0%10
Edward T La Barr100.0%10
Gloryvid Figueroa-Gibson97.4%3910
Tom V Sheng95.5%6220
Koosha Sharifi-Tafreshi93.3%16317
Cory A Almeida92.2%2048
Christopher J Kohlman91.6%3455
Chineyere D Wills-Burns90.6%2440
Darlene M Ritchie90.3%2780
Wesner Sajous90.0%3200
Insa Sadio87.6%6627
Ryan R Yang87.1%1710
Amy Onyekaba86.2%4844
Amen W Bogale86.0%3228
Jacinta M Crawford85.1%1210
Hau H Nguyen84.7%2030
Phu K Nguyen84.1%2890
William Boddie83.3%60
Kimbinh T Nguyen83.1%2360
Viet David Pham83.0%1410
Vinh Tang Lam82.8%44814
Sejoon Ahn82.1%4530
Kevin M Nguyen81.7%5758
Jeffrey J Piziali80.5%30227
Afroza Y Chowdhury80.3%6308
Antonio A Caschera79.9%1740
Javid A Amini79.0%2050
David T Welch78.3%1290
Robin J Mishler76.0%55514
Alan T Buttram75.9%290
Robert M Stone73.5%1320
Said A Broome72.5%1670
Joni Hsu72.4%1560
Scott E Sonners72.2%790
David H Chu70.3%1280
Peter-Anthon Pappas68.6%510
Motilewa Good Johnson68.0%2000
Chante E Harrison67.7%1640
Mansour M Said67.1%820
Kuo-Kong Woo66.7%1200
Leon T Cain II66.7%240
Jeffery A Brier66.5%1610
Jwalant B Amin65.2%1120
Michelle L Sams65.0%1170
Robert J Craddock64.5%620
Jr, Maurice L Mcdowell63.0%1380
Tize Ma60.3%1360
Daniel F Hajnik58.6%1690
Jeffrey J Chow58.3%1200
Charles Tseng58.2%790
Sing-Wai Wu58.1%310
Michelle Chin57.1%280
Wynton S Jones55.6%90
Roberta D Prendergast55.0%1000
Daniel C Washburn52.9%1210
Phi Hoang52.9%1210
Allison Walthall Johnson52.5%400
Zhengxi Liu51.7%290
Donna J Ricks48.3%600
Edward Martello48.1%1060
Janice W Kau47.1%170
Jason Michael Repko45.9%740
Crystal Mathews45.8%480
Andrew Gus Yang45.6%680
Lillian K Ng45.5%110
Abderrahim Merouan45.4%970
Andrew Shin42.1%190
Randal L Willis42.1%190
Aaron M Richer41.5%1060
Yingchun He40.7%270
Carlos Perromat39.8%930
Jed-Justin Imperial38.9%180
Robert N. Bader38.5%390
Jin Cheng Wang38.4%990
Aaron M Guertin37.5%240
Kim Thanh Thi Tran37.5%80
Kyle Zhai37.5%80
Phong X Nguyen37.5%80
Weiming He35.3%170
Peter Hoang33.3%150
Sultana Marcia Zalalee30.0%100
Richard M Russell28.6%350
Matthew D Salvucci28.6%140
Fikru Gennene26.7%150
Nitin Patel25.0%481
Anh Tuan V Nguyen20.0%100
Ulka J Chauhan20.0%50
Michael J Rooney16.7%60
Kee M Tung0.0%180
Fernando Cota Jr.0.0%20
Megan Brittany Gentle0.0%20
Andrew J Wang0.0%10

Frequently Asked Questions

What is the allowance rate in USPTO Art Unit 2628?

79.6% over the last five years, across 4,938 resolved applications.

Which examiners in Art Unit 2628 have the highest allowance rates?

Among examiners with at least 30 resolved applications: Gloryvid Figueroa-Gibson (97.4%, 39 resolved), Tom V Sheng (95.5%, 622 resolved), Koosha Sharifi-Tafreshi (93.3%, 163 resolved).

Which examiners in Art Unit 2628 have the lowest allowance rates?

Among examiners with at least 30 resolved applications: Nitin Patel (25.0%, 48 resolved), Richard M Russell (28.6%, 35 resolved), Jin Cheng Wang (38.4%, 99 resolved).

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