Granted Patent
Utility
US 4,247,658 · App. 06/004,967
Surface treated polyester substrates
Inventor:
Robert J. Arrowsmith
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Jan 22, 1979
Inventor
Robert J. Arrowsmith
Assignee (at issue)
Fiber Industries, 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.