Granted Patent
Utility
US 4,279,828 · App. 06/159,095
Process for separating 3-hydroxy steroids or sterols from mixtures such as lipids
Inventor:
Charles H. Foster
Patented Case
View Patent ↗
Granted: Jul 21, 1981
Filed: Jun 13, 1980
Inventor
Charles H. Foster
Assignee (at issue)
EASTMAN KODAK COMPANY
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.