Granted Patent
Utility
US 4,562,953 · App. 06/656,685
Valve seat structure for automotive thermostatic fluid control valve device
Inventors:
Wayne R. Duprez, Bradley J. McKenzie
Patented Case
View Patent ↗
Granted: Jan 7, 1986
Filed: Oct 1, 1984
Inventors
Wayne R. Duprez
Bradley J. McKenzie
Assignee (at issue)
Standard-Thomson 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.