Granted Patent
Utility
US 6,331,261 · App. 09/410,313
Water softener salt formulation
Inventors:
Kurt John Waatti, Eugene J. Kuhajek
Patented Case
View Patent ↗
Granted: Dec 18, 2001
Filed: Oct 1, 1999
Inventors
Kurt John Waatti
Eugene J. Kuhajek
Assignee (at issue)
Rohm and Haas 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.