Granted Patent
Utility
US 4,380,678 · App. 06/226,998
Multi-stage aldoses to polyols process
Inventor:
Amalesh K. Sirkar
Patented Case
View Patent ↗
Granted: Apr 19, 1983
Filed: Mar 20, 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.