Granted Patent
Utility
US 4,644,019 · App. 06/791,679
Modified terephthalic ester polyols and rigid foams therefrom
Inventor:
Kenneth G. McDaniel
Patented Case
View Patent ↗
Granted: Feb 17, 1987
Filed: Oct 28, 1985
Inventor
Kenneth G. McDaniel
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.