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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
DA

David Askin — 32 Patents

Merck: 29 patents #282 of 9,382Top 4%
ABArray Biopharma: 3 patents #169 of 335Top 55%
Genentech: 3 patents #890 of 2,392Top 40%
South San Francisco, CA: #63 of 1,066 inventorsTop 6%
California: #15,919 of 386,348 inventorsTop 5%
Overall (All Time): #110,428 of 4,157,543Top 3%
32 Patents All Time
David Askin has been granted 32 US patents while listed as an inventor at Merck. The first was granted in 1989 and the most recent in October 2017. David Askin ranks #110,428 of 4,157,543 US inventors in our database (top 2.7%). Patent records list David Askin in South San Francisco, CA, US.

Patents per Year

Patents granted per year, 1989 to 2017Bar chart with a peak of 6 patents in 1997.peak 61989: 1 patents19891990: 2 patents1992: 3 patents19921993: 1 patents1995: 2 patents19951996: 3 patents1997: 6 patents19971998: 2 patents1999: 2 patents19992000: 3 patents2001: 1 patents20012002: 1 patents2003: 1 patents20032009: 1 patents2016: 1 patents20162017: 2 patents2017

Issued Patents All Time

Showing 1–25 of 32 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
9790190 Process for making hydroxylated cyclopentylpyrimidine compounds Chong Han, Jonathan Lane, Travis Remarchuk, Sagar Shakya, C. Gregory Sowell +2 more 2017-10-17 $7,871,000
9676730 Process for making hydroxylated cyclopentylpyrimidine compounds Chong Han, Jonathan Lane, Travis Remarchuk, Sagar Shakya, C. Gregory Sowell +2 more 2017-06-13 $10,834,000
9416110 Process for making hydroxylated cyclopentylpyrimidine compounds Chong Han, Jonathan Lane, Travis Remarchuk, Sagar Shakya, C. Gregory Sowell +2 more 2016-08-16 $7,047,000
7598264 HIV integrase inhibitors Wei Han, Melissa Egbertson, John S. Wai, Linghang Zhuang, Rowena D. Ruzek +8 more 2009-10-06 $46,778,000
6642237 Gamma-hydroxy-2-(fluoroalkylaminocarbonyl)-1-piperazinepentanamides and uses thereof James R. Tata, Kevin T. Chapman, Joseph L. Duffy, Nancy J. Kevin, Yuan Cheng +12 more 2003-11-04 $71,768,000
6388083 Process for the synthesis of (2S)-phenyl-3-piperidone Jaemoon Lee, Thoa Hoang 2002-05-14 $97,118,000
6239280 Process for synthesizing biaryl inhibitors of farnesyl-protein transferase Jennifer A. Cowen, Peter E. Maligres, J. Christopher McWilliams, Marjorie Waters 2001-05-29 $273,276,000
6160118 Process for the synthesis of substituted piperazinones via Mitsunobu reaction Stephanie Lewis, Steven A. Weissman 2000-12-12 $257,143,000
6140508 Process for making 1,5-disubstituted imidazoles Jennifer A. Cowen, Peter E. Maligres, J. Christopher McWilliams, Marjorie Waters 2000-10-31 $152,766,000
6071916 HIV protease inhibitor Robert Purick, R. Scott Hoerrner, Paul J. Reider, Richard J. Varsolona, Ralph P. Volante 2000-06-06 $181,911,000
5929243 Process for the preparation of (S)-3-carbethoxy-3-benzylpiperidine Peter E. Maligres, Michel Chartrain, Ralph P. Volante 1999-07-27 $152,441,000
5861512 Process for making HIV protese inhibitors Kai Rossen, Paul J. Reider, Richard J. Varsolona, Ralph P. Volante, Kenneth M. Wells 1999-01-19 $138,149,000
5728840 Process for making an epoxide Kan K. Eng, Peter E. Maligres, Paul J. Reider, Kai Rossen, Ralph P. Volante +2 more 1998-03-17 $111,836,000
5723615 Process for preparing 4-tert-butyloxycarbonyl-(S)-piperazine-2-tert-butylcarboxamide Kai Rossen, Steven A. Weissman, Jess Sager, Paul J. Reider, Ralph P. Volante 1998-03-03 $124,388,000
5693803 Process for making HIV protease inhibitors Kai Rossen, Paul J. Reider, Richard J. Varsolona, Ralph P. Volante, Kenneth M. Wells 1997-12-02 $56,997,000
5663341 Process for making HIV protease inhibitors Kai Rossen, Paul J. Reider, Richard J. Varsolona, Ralph P. Volante 1997-09-02 $56,127,000
5637711 Process for making HIV protease inhibitors Paul J. Reider, Kai Rossen, Richard J. Varsolona, Ralph P. Volante, Kenneth M. Wells 1997-06-10 $116,710,000
5618939 Process for making HIV protease inhibitors Paul J. Reider, Kai Rossen, Richard J. Varsolona, Ralph P. Volante, Kenneth M. Wells 1997-04-08 $51,720,000
5618937 Process to make HIV protease inhibitor from (2S)-4-picolyl-2-piperazine-t-butylcarboxamide Kan K. Eng, Paul J. Reider, Ralph P. Volante 1997-04-08 $51,720,000
5612484 Process for making HIV protease inhibitors Jess Sager, Kai Rossen, Ralph P. Volante, Paul J. Reider 1997-03-18 $78,728,000
5508404 Reductive amination process Steven J. Cianciosi, Robert S. Hoerrner 1996-04-16 $100,680,000
5496948 Process for making HIV protease inhibitors Kan K. Eng, Ralph P. Volante 1996-03-05 $99,757,000
5491238 Process for making HIV protease inhibitors Ralph P. Volante, Kan K. Eng 1996-02-13 $142,002,000
5463067 Process for making HIV protease inhibitors Kan K. Eng, Ralph P. Volante 1995-10-31 $150,897,000
5446158 Process for synthesis of FK-506 and tricarbonyl intermediates Todd K. Jones, Sander G. Mills, Robert A. Reamer, Richard Desmond, David M. Tschaen +2 more 1995-08-29 $68,257,000