Granted Patent
Utility
US 4,373,646 · App. 06/263,654
Cartridge-type dispenser
Inventor:
George E. MacEwen
Patented Case
View Patent ↗
Granted: Feb 15, 1983
Filed: May 14, 1981
Inventor
George E. MacEwen
Assignee (at issue)
Phillips Petroleum Company
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.