Granted Patent
Utility
US 5,758,694 · App. 08/643,621
Fire resistant pipe
Inventors:
Ralph Friedrich, John F. Kane, Mark H. Fortune
Patented Case
View Patent ↗
Granted: Jun 2, 1998
Filed: May 6, 1996
Inventors
Ralph Friedrich
John F. Kane
Mark H. Fortune
Assignee (at issue)
AMERON INTERNATIONAL CORPORATION
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.