Granted Patent
Utility
US 4,704,446 · App. 06/835,693
Polyurethanes based on urethane polyols and short and long chain polyols
Inventor:
Anil B. Goel
Patented Case
View Patent ↗
Granted: Nov 3, 1987
Filed: Mar 3, 1986
Inventor
Anil B. Goel
Assignee (at issue)
Ashland Oil, 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.