Granted Patent
Utility
US 4,933,235 · App. 07/272,673
Protective pipewrap system containing a rubber-based coating composition
Inventor:
Jordan D. Kellner
Patented Case
View Patent ↗
Granted: Jun 12, 1990
Filed: Nov 16, 1988
Inventor
Jordan D. Kellner
Assignee (at issue)
The Kendall Company LP
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.