Granted Patent
Utility
US 5,185,191 · App. 07/593,991
Surface modified, U.V. stabilized, polyvinyl chloride article
Inventors:
Joseph Silbermann, Michael T. Burchill
Patented Case
View Patent ↗
Granted: Feb 9, 1993
Filed: Oct 9, 1990
Inventors
Joseph Silbermann
Michael T. Burchill
Assignee (at issue)
Elf Atochem North America, 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.