Granted Patent
Utility
US 5,725,015 · App. 08/642,024
Pilot-operated safety relief valve assembly
Inventors:
Michael Theodos, Roger Dale Danzy
Patented Case
View Patent ↗
Granted: Mar 10, 1998
Filed: Apr 29, 1996
Inventors
Michael Theodos
Roger Dale Danzy
Assignee (at issue)
Dresser Industries, 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.