Granted Patent
Utility
US 4,486,939 · App. 06/430,229
Method and apparatus for attaching flexible membranes to a rigid backing
Inventor:
Vytautas Kupcikevicius
Patented Case
View Patent ↗
Granted: Dec 11, 1984
Filed: Sep 30, 1982
Inventor
Vytautas Kupcikevicius
Assignee (at issue)
Union Carbide 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.