Granted Patent
Utility
US 4,349,494 · App. 06/130,778
Method of making a fire-retardant product having a foamed lore and a fire-retardant protective layer
Inventor:
Glenn E. Fulmer
Patented Case
View Patent ↗
Granted: Sep 14, 1982
Filed: Mar 17, 1980
Inventor
Glenn E. Fulmer
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.