Granted Patent
Utility
US 4,658,979 · App. 06/818,563
Propellant filling and sealing valve
Inventors:
Raymond E. Mietz, Harlen E. Wilkinson
Patented Case
View Patent ↗
Granted: Apr 21, 1987
Filed: Jan 13, 1986
Inventors
Raymond E. Mietz
Harlen E. Wilkinson
Assignee (at issue)
American Can 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.