Granted Patent
Utility
US 6,779,539 · App. 10/375,749
Dispensing apparatus for delivering controlled amounts of water soluble material to a process stream
Inventors:
John F. Schwamberger, Edward R. Bowden
Patented Case
View Patent ↗
Granted: Aug 24, 2004
Filed: Feb 26, 2003
Inventors
John F. Schwamberger
Edward R. Bowden
Assignee (at issue)
JohnsonDiversey, 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.