Granted Patent
Utility
US 4,262,447 · App. 06/067,608
Double acting hinged pressure vessel closure
Inventors:
Michael Schneier, Henry B. Peters, Jr.
Patented Case
View Patent ↗
Granted: Apr 21, 1981
Filed: Aug 20, 1979
Inventors
Michael Schneier
Henry B. Peters, Jr.
Assignee (at issue)
Sybron 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.