Granted Patent
Utility
US 4,158,087 · App. 05/801,079
Urethane foams having low resiliency
Inventor:
Louis L. Wood
Patented Case
View Patent ↗
Granted: Jun 12, 1979
Filed: May 27, 1977
Inventor
Louis L. Wood
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.