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

Michael K. O'Brien — 17 Patents

HEHercules: 6 patents #70 of 725Top 10%
RSRhone-Poulenc Rorer S.A.: 4 patents #57 of 323Top 20%
APAventis Pharmaceuticals: 3 patents #95 of 454Top 25%
APAventis Pharmaceuticals Products: 2 patents #12 of 76Top 20%
RPRhone-Poulenc Rorer Pharmaceuticals: 1 patents #68 of 155Top 45%
Middletown, DE: #19 of 298 inventorsTop 7%
Delaware: #508 of 7,163 inventorsTop 8%
Overall (All Time): #263,971 of 4,157,543Top 7%
17 Patents All Time
Michael K. O'Brien has been granted 17 US patents while listed as an inventor at Hercules. The first was granted in 1993 and the most recent in August 2002. Michael K. O'Brien ranks #263,971 of 4,157,543 US inventors in our database (top 6.3%). Patent records list Michael K. O'Brien in Middletown, DE, US.

Patents per Year

Patents granted per year, 1993 to 2002Bar chart with a peak of 3 patents in 1997.peak 31993: 1 patents19931994: 2 patents19941996: 1 patents19961997: 3 patents19971998: 3 patents19981999: 1 patents19992000: 2 patents20002001: 1 patents20012002: 3 patents2002

Issued Patents All Time

Showing 1–17 of 17 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6433172 Steroespecific preparation of chiral 1-aryl- and 1-heteroaryl-2-substituted ethyl-2-amines Luc Grondard, Jean-Paul Casimir, Patrick Leon, Matthew R. Powers, Daniel Robin 2002-08-13 $954,000
6433209 Alpha-substitution of unprotected &bgr;-amino ester compounds Sithamalli Chandramouli, Tory H. Powner 2002-08-13 $954,000
6429315 Process for preparing N6-substituted adenosine derivatives Adam W. Sledeski, Luc Grondard, Matthew R. Powers, Tory H. Powner, Ching T. Tsuei +4 more 2002-08-06 $6,101,000
6184382 Process for preparing N6-substituted adenosine derivatives Diane C. Salazar, Walter Rodriguez, James P. Sherbine, Rick G. Woodward, Adam W. Sledeski +1 more 2001-02-06 $15,080,000
6143894 Preparation of [1S-[1A,2B,3B,4A(S*)]]-4-[7-[[1-(3-chloro-2-thienyl)methyl propyl]amino] -3H-imidazo[4,5-B]pyridin-3-yl]-N-ethyl-2,3-dihydroxycyclopentanecarboxa mide Herve Garcia, Patrick Leon, Tory H. Powner, Laurence W. Reilly, Jr., Harshavadan C. Shah +4 more 2000-11-07 $10,663,000
6127550 Stereospecific preparation of chiral 1-aryl-and 1-heteroaryl-2-substituted ethyl-2-amines Luc Grondard, Jean-Paul Casimir, Patrick Leon, Matthew R. Powers, Daniel Robin 2000-10-03
5886192 L-tartaric acid salt of a (1R) diastereomer of a 2-azadihydroxybicyclo2.2.1!heptane compound and the preparation of 2-azabicyclo2.2.1!heptane compounds Patrick Leon, Denis Largeau, Thierry Durand, Matthew R. Powers 1999-03-23
5831096 L-tartaric acid salt of a (1R) diastereomer of a 2-azadihydroxybicyclo2.2.1!heptane compound and the preparation of 2-azabicyclo2.2.1! heptane compounds Patrick Leon, Denis Largeau, Matthew R. Powers, Ching T. Tsuei 1998-11-03
5808093 L-tartaric acid salt of a (1R) diastereomer of a 2-azadihydroxybicyclo2.2.1!heptane compound and the preparation of 2-azabicyclo2.2.1!heptane compounds Patrick Leon, Denis Largeau, Ching T. Tsuei, Thierry Durand 1998-09-15
5714304 Nonlinear optical media of organosilicon crosslinked polymer Wayne M. Gibbons, Robert P. Grasso, Paul J. Shannon, Shao-Tang Sun 1998-02-03 $11,840,000
5684159 L-tartaric acid salt of a (1R) diastereomer of a 2-azadihydroxybicyclo2.2.1!heptane compound and the preparation of 2-azabicyclo2.2.1!heptane compounds Patrick Leon, Denis Largeau, Matthew R. Powers, Thierry Durand 1997-11-04 $15,791,000
5663308 Organosilicon polymers, and dyes, exhibiting nonlinear optical response Wayne M. Gibbons, Robert P. Grasso, Paul J. Shannon, Shao-Tang Sun 1997-09-02 $29,289,000
5605726 Organosilicon polymers, and dyes, exhibiting nonlinear optical response Wayne M. Gibbons, Robert P. Grasso, Paul J. Shannon, Shao-Tang Sun 1997-02-25 $29,041,000
5589100 Dichroic azo dyes Robert P. Grasso, Paul J. Shannon 1996-12-31 $13,034,000
5326865 Arylazo and poly(arylazo) dyes having at least one core radical selected from naphthyl or anthracyl and having at least one 2,3-dihydro-1,3-dialkyl perimidine substituent Robert P. Grasso, Paul J. Shannon 1994-07-05 $17,012,000
5298588 Organosilicon polymers, and dyes, exhibiting nonlinear optical response Wayne M. Gibbons, Robert P. Grasso, Paul J. Shannon, Shao-Tang Sun 1994-03-29 $4,761,000
5254655 Organosilicon polymers, and dyes, exhibiting nonlinear optical response Wayne M. Gibbons, Robert P. Grasso, Paul J. Shannon, Shao-Tang Sun 1993-10-19 $8,023,000