Granted Patent
Utility
US 4,407,879 · App. 06/290,860
Method of producing a textured film
Inventor:
John A. Smart
Patented Case
View Patent ↗
Granted: Oct 4, 1983
Filed: Aug 7, 1981
Inventor
John A. Smart
Assignee (at issue)
Northern Petrochemical Company
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.