Granted Patent
Utility
US 4,826,882 · App. 07/181,837
Open celled polyurethane foams
Inventors:
Charles W. Bredbenner, Richard B. Rupp
Patented Case
View Patent ↗
Granted: May 2, 1989
Filed: Apr 15, 1988
Inventors
Charles W. Bredbenner
Richard B. Rupp
Assignee (at issue)
PMC, 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.