Granted Patent
Utility
US 4,512,550 · App. 06/516,685
Sealing means for valve spindle
Inventor:
Erich J. Kocher
Patented Case
View Patent ↗
Granted: Apr 23, 1985
Filed: Jul 25, 1983
Inventor
Erich J. Kocher
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.