Granted Patent
Utility
US 5,228,434 · App. 07/806,380
Mixture for anesthesia
Inventor:
Royce S. Fishman
Patented Case
View Patent ↗
Granted: Jul 20, 1993
Filed: Dec 13, 1991
Inventor
Royce S. Fishman
Assignee (at issue)
Praxair Technology, 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.