Granted Patent
Utility
US 4,252,794 · App. 06/105,543
Gamma-sorbitol polymorph
Inventor:
James W. DuRoss
Patented Case
View Patent ↗
Granted: Feb 24, 1981
Filed: Dec 20, 1979
Inventor
James W. DuRoss
Assignee (at issue)
ICI Americas, 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.