Granted Patent
Utility
US 4,211,847 · App. 05/962,542
Polyurethane foams and foam forming compositions containing amine scavengers
Inventors:
Clifton L. Kehr, Louis L. Wood, James L. Guthrie
Patented Case
View Patent ↗
Granted: Jul 8, 1980
Filed: Nov 20, 1978
Inventors
Clifton L. Kehr
Louis L. Wood
James L. Guthrie
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.