Granted Patent
Utility
US 4,155,314 · App. 05/888,460
Suspension medium
Inventors:
William O'Callaghan, Gianfranco Mecatti
Patented Case
View Patent ↗
Granted: May 22, 1979
Filed: Mar 20, 1978
Inventors
William O'Callaghan
Gianfranco Mecatti
Assignee (at issue)
Hercules Powder Company Limited
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.