Granted Patent
Utility
US 4,340,158 · App. 06/159,286
Vent-sealing, down-locked pump dispenser
Inventors:
John M. B. Ford, Wallace F. Magers, John J. Palmisano
Patented Case
View Patent ↗
Granted: Jul 20, 1982
Filed: Jun 13, 1980
Inventors
John M. B. Ford
Wallace F. Magers
John J. Palmisano
Assignee (at issue)
Realex Corporation
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.