Granted Patent
Utility
US 4,358,034 · App. 06/114,815
Sliding gate valve with orifice-encircling spring
Inventor:
Robert D. Hind
Patented Case
View Patent ↗
Granted: Nov 9, 1982
Filed: Jan 24, 1980
Inventor
Robert D. Hind
Assignee (at issue)
USS Engineers and Consultants, 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.