Granted Patent
Utility
US 5,344,619 · App. 08/029,210
Apparatus for dissolving dry polymer
Inventors:
Keith L. Larwick, Kevin A. Demarest
Patented Case
View Patent ↗
Granted: Sep 6, 1994
Filed: Mar 10, 1993
Inventors
Keith L. Larwick
Kevin A. Demarest
Assignee (at issue)
Betz PaperChem 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.