Granted Patent
Utility
US 4,692,381 · App. 07/023,172
Foamable polyvinylidene fluoride and methods
Inventor:
Roger L. Pecsok
Patented Case
View Patent ↗
Granted: Sep 8, 1987
Filed: Mar 9, 1987
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.