Granted Patent
Utility
US 4,865,880 · App. 07/076,629
Surface modified, U.V. stabilized, polyvinyl chloride article
Inventors:
Joseph Silbermann, Michael T. Burchill
Patented Case
View Patent ↗
Granted: Sep 12, 1989
Filed: Jul 23, 1987
Inventors
Joseph Silbermann
Michael T. Burchill
Assignee (at issue)
M&T 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.