Granted Patent
Utility
US 4,596,633 · App. 06/674,107
Surface treatment of paper and paperboard
Inventor:
Brian William Attwood
Patented Case
View Patent ↗
Granted: Jun 24, 1986
Filed: Nov 21, 1984
Inventor
Brian William Attwood
Assignee (at issue)
Black Clawson Company, 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.