Granted Patent
Utility
US 4,248,931 · App. 06/143,748
Dimensionally stable structural foam plastic product
Inventor:
Syed Salman
Patented Case
View Patent ↗
Granted: Feb 3, 1981
Filed: Apr 25, 1980
Inventor
Syed Salman
Assignee (at issue)
International Telephone and Telegraph Corporation
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.