Granted Patent
Utility
US 4,607,760 · App. 06/759,028
Closure for a pressurized chamber
Inventor:
John N. Roche
Patented Case
View Patent ↗
Granted: Aug 26, 1986
Filed: Jul 25, 1985
Inventor
John N. Roche
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.