Granted Patent
Utility
US 4,634,093 · App. 06/784,776
Mounting means for valve disc
Inventor:
Robert J. Schintgen
Patented Case
View Patent ↗
Granted: Jan 6, 1987
Filed: Oct 7, 1985
Inventor
Robert J. Schintgen
Assignee (at issue)
Vilter Manufacturing 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.