Granted Patent
Utility
US 5,221,670 · App. 07/777,983
Rapamycin esters
Inventor:
Craig E. Caufield
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Oct 17, 1991
Inventor
Craig E. Caufield
Assignee (at issue)
Amerimas Home Products, 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.