Granted Patent
Utility
US 5,049,495 · App. 06/868,016
Fermentation method for producing polyether antibiotics
Inventor:
Guido M. Miescher
Patented Case
View Patent ↗
Granted: Sep 17, 1991
Filed: May 29, 1986
Inventor
Guido M. Miescher
Assignee (at issue)
International Minerals & Chemical Corp.
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.