Granted Patent
Utility
US 4,297,482 · App. 06/190,114
Chain-extended polyol compositions and method
Inventors:
Louis L. Wood, Donald W. Larsen
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Sep 24, 1980
Inventors
Louis L. Wood
Donald W. Larsen
Assignee (at issue)
W. R. Grace & Co.
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.