Granted Patent
Utility
US 4,707,865 · App. 06/891,708
Dispenser with fluid pathway including valve to form air lock
Inventors:
Clifford J. Ludwig, Anthony Delia
Patented Case
View Patent ↗
Granted: Nov 24, 1987
Filed: Jul 31, 1986
Inventors
Clifford J. Ludwig
Anthony Delia
Assignee (at issue)
The Drackett 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.