Granted Patent
Utility
US 5,698,741 · App. 08/680,940
Asymmetric synthesis of (-)6-chloro-4-cyclopropyl-ethynyl-4-trifluoromethyl-1,4-dihydro-2H-3,1-b enzoxazin-2-one
Inventors:
Andrew S. Thompson, Edward G. Corley, Edward J. J. Grabowski, Nobuyoshi Yasuda
Patented Case
View Patent ↗
Granted: Dec 16, 1997
Filed: Jul 15, 1996
Inventors
Andrew S. Thompson
Edward G. Corley
Edward J. J. Grabowski
Nobuyoshi Yasuda
Assignee (at issue)
MERCK & CO., INC.
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.