Granted Patent
Utility
US 4,983,329 · App. 07/384,142
Preparation of esterified propoxylated glycerin from free fatty acids
Inventor:
Charles F. Cooper
Patented Case
View Patent ↗
Granted: Jan 8, 1991
Filed: Jul 27, 1989
Inventor
Charles F. Cooper
Assignee (at issue)
Arco Chemical Technology, L.P.
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.