Granted Patent
Utility
US 5,794,821 · App. 08/646,441
Reciprocating liquid pump with disc check valve for dispensing lotion and the like
Inventors:
Donald D. Foster, Philip L. Nelson
Patented Case
View Patent ↗
Granted: Aug 18, 1998
Filed: May 7, 1996
Inventors
Donald D. Foster
Philip L. Nelson
Assignee (at issue)
Contico International, LLC
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.