Granted Patent
Utility
US 4,615,850 · App. 06/630,924
Foamable polyvinylidene fluoride and methods
Inventor:
Roger L. Pecsok
Patented Case
View Patent ↗
Granted: Oct 7, 1986
Filed: Jul 16, 1984
Inventor
Roger L. Pecsok
Assignee (at issue)
Pennwalt 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.