Granted Patent
Utility
US 4,845,140 · App. 07/167,214
Waxless polyvinyl alcohol size composition
Inventor:
Finn L. Marten
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Mar 11, 1988
Inventor
Finn L. Marten
Assignee (at issue)
Air Products and Chemicals, 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.