Granted Patent
Utility
US 6,821,990 · App. 09/760,590
Ethanol solvate of (-)-cis-2-(2-chlorophenyl)-5, 7-dihydroxy-8 [4R-(3S-hydroxy-1-M ethyl) piperidinyl]-4H-1-benzopyran-4-one
Inventor:
Kurt Kesseler
Patented Case
View Patent ↗
Granted: Nov 23, 2004
Filed: Jan 16, 2001
Inventor
Kurt Kesseler
Assignee (at issue)
Aventis Pharma Deutschland GmbH
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.