Granted Patent
Utility
US 6,221,891 · App. 09/428,499
Crystal form of N-(4-triflouromethylphenyl)-5-methylisoxazole-4-carboxamide
Inventors:
Holger Faasch, Udo Hedtmann, Uwe Westenfelder, Erich Paulus
Patented Case
View Patent ↗
Granted: Apr 24, 2001
Filed: Oct 28, 1999
Inventors
Holger Faasch
Udo Hedtmann
Uwe Westenfelder
Erich Paulus
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.