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Stephen Challenger — 7 Patents

Pfizer: 7 patents #741 of 5,153Top 15%
Overall (All Time): #680,018 of 4,157,543Top 20%
7 Patents All Time
Stephen Challenger has been granted 7 US patents while listed as an inventor at Pfizer. The first was granted in 1992 and the most recent in February 2005. Stephen Challenger ranks #680,018 of 4,157,543 US inventors in our database (top 16.4%). Patent records list Stephen Challenger in Macclesfield, NY, GB.

Patents per Year

Patents granted per year, 1992 to 2005Bar chart with a peak of 2 patents in 1998.peak 21992: 1 patents19921997: 1 patents19971998: 2 patents19982001: 1 patents20012003: 1 patents20032005: 1 patents2005

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6849649 N-phenpropylcyclopentyl-substituted glutaramide derivatives as inhibitors of neutral endopeptidase Andrew Cook, Adam Gillmore, Donald Middleton, David Cameron Pryde, Alan Stobie 2005-02-01 $221,993,000
6660756 N-phenpropylcyclopentyl-substituted glutaramide derivatives as inhibitors of neutral endopeptidase Andrew Cook, Adam Gillmore, Donald Middleton, David Cameron Pryde, Alan Stobie 2003-12-09 $301,764,000
6211223 Indole derivatives useful in therapy Kevin Neil Dack, Andrew Michael Derrick, Roger P. Dickinson, David Ellis, Yousef Hajikarimian +2 more 2001-04-03 $932,933,000
RE35865 Preparation of glutaric acid derivatives 1998-07-28
5714628 Preparation of glutaric acid derivatives 1998-02-03 $296,487,000
5618970 Hydrogenation 1997-04-08 $44,939,000
5166406 Preparation of glutaric acid derivatives 1992-11-24 $34,177,000