Granted Patent
Utility
US 4,222,501 · App. 05/927,563
Dual chamber, continuous action dispenser
Inventors:
Roy Hammett, Nicholas G. Capra
Patented Case
View Patent ↗
Granted: Sep 16, 1980
Filed: Jul 24, 1978
Inventors
Roy Hammett
Nicholas G. Capra
Assignee (at issue)
James D. Pauls and J. Claybrook Lewis and Associates, 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.