Granted Patent
Utility
US 6,729,501 · App. 10/135,950
Dose dispensing pump for dispensing two or more materials
Inventor:
Erik Peterson
Patented Case
View Patent ↗
Granted: May 4, 2004
Filed: Jul 25, 2002
Inventor
Erik Peterson
Assignee (at issue)
Unilever Home & Personal Care USA, Division of Conopco, Inc.
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.