Granted Patent
Utility
US 4,239,691 · App. 06/045,555
Conversion of non-alpha-tocopherols to alpha-tocopherols
Inventors:
Donald R. Nelan, Charles H. Foster
Patented Case
View Patent ↗
Granted: Dec 16, 1980
Filed: Jun 4, 1979
Inventors
Donald R. Nelan
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.