Granted Patent
Utility
US 4,584,231 · App. 06/557,448
Solvent cast acrylic film
Inventor:
Henry E. Knoop
Patented Case
View Patent ↗
Granted: Apr 22, 1986
Filed: Dec 2, 1983
Inventor
Henry E. Knoop
Assignee (at issue)
VCF Packaging Films, Inc.
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.