Granted Patent
Utility
US 4,536,845 · App. 06/528,242
Self-programmable controller for water conditioner recharging
Inventors:
Donald P. DeVale, Stanley F. Rak
Patented Case
View Patent ↗
Granted: Aug 20, 1985
Filed: Aug 31, 1983
Inventors
Donald P. DeVale
Stanley F. Rak
Assignee (at issue)
CULLIGAN INTERNATIONAL 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.