Granted Patent
Utility
US 4,386,003 · App. 06/303,001
Blood separating composition
Inventor:
William R. Fiehler
Patented Case
View Patent ↗
Granted: May 31, 1983
Filed: Sep 17, 1981
Inventor
William R. Fiehler
Assignee (at issue)
Sherwood Medical Industries 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.