Granted Patent
Utility
US 4,664,859 · App. 06/817,842
Process for solvent casting a film
Inventor:
Henry E. Knoop
Patented Case
View Patent ↗
Granted: May 12, 1987
Filed: Jan 10, 1986
Inventor
Henry E. Knoop
Assignee (at issue)
VCF Films Inc. Div. of PMC
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.