Granted Patent
Utility
US 4,338,472 · App. 06/227,000
Catalytic hydrogenolysis of alditols to produce polyols
Inventor:
Amalesh K. Sirkar
Patented Case
View Patent ↗
Granted: Jul 6, 1982
Filed: Jan 21, 1981
Inventor
Amalesh K. Sirkar
Assignee (at issue)
Hydrocarbon Research, 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.