Granted Patent
Utility
US 5,716,077 · App. 08/642,218
Fire resistant sprinkler coupling
Inventors:
Ralph Friedrich, Paul Kubat
Patented Case
View Patent ↗
Granted: Feb 10, 1998
Filed: May 6, 1996
Inventors
Ralph Friedrich
Paul Kubat
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.