Granted Patent
Utility
US 5,538,962 · App. 08/132,256
Antibiotic penem compounds
Inventor:
Patrice J. Siret
Patented Case
View Patent ↗
Granted: Jul 23, 1996
Filed: Oct 6, 1993
Inventor
Patrice J. Siret
Assignee (at issue)
Zeneca Limited
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.