Granted Patent
Utility
US 4,661,609 · App. 06/891,093
Process for cosynthesis of ethylene glycol and dimethyl carbonate
Inventor:
John F. Knifton
Patented Case
View Patent ↗
Granted: Apr 28, 1987
Filed: Jul 31, 1986
Inventor
John F. Knifton
Assignee (at issue)
Texaco 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.