Granted Patent
Utility
US 5,569,682 · App. 08/463,266
Fire-retardant polyurethane foams and method of producing
Inventor:
Graham D. Walmsley
Patented Case
View Patent ↗
Granted: Oct 29, 1996
Filed: Jun 5, 1995
Inventor
Graham D. Walmsley
Assignee (at issue)
HICKORY SPRINGS MANUFACTURING COMPANY
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.