Granted Patent
Utility
US 5,158,946 · App. 07/583,226
Cephalosporin derivatives and pharmaceutical compositions
Inventors:
Brian Charles Gasson, Jeremy David Hinks
Patented Case
View Patent ↗
Granted: Oct 27, 1992
Filed: Sep 14, 1990
Inventors
Brian Charles Gasson
Jeremy David Hinks
Assignee (at issue)
Beecham Group plc
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.