Granted Patent
Utility
US 5,842,500 · App. 08/905,419
Overfill preventing valve
Inventors:
JAMES MICHAEL ROCKWOOD, Paul Joseph Smith, David Earl Nitchke, John M. Janak, Steven Francis Hawkes
Patented Case
View Patent ↗
Granted: Dec 1, 1998
Filed: Aug 4, 1997
Inventors
JAMES MICHAEL ROCKWOOD
Paul Joseph Smith
David Earl Nitchke
John M. Janak
Steven Francis Hawkes
Assignee (at issue)
HARSCO TECHNOLOGIES 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.