Granted Patent
Utility
US 4,527,588 · App. 06/561,481
Safety valve
Inventors:
Gus G. Tseo, Mark E. Alpen
Patented Case
View Patent ↗
Granted: Jul 9, 1985
Filed: Dec 14, 1983
Inventors
Gus G. Tseo
Mark E. Alpen
Assignee (at issue)
WARNER-LAMBERT COMPANY LLC
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.