Granted Patent
Utility
US 4,067,690 · App. 05/767,151
Boiler water treatment
Inventors:
Dionisio G. Cuisia, Chih M. Hwa, Jose T. Jacob, Murrell L. Salutsky
Patented Case
View Patent ↗
Granted: Jan 10, 1978
Filed: Feb 9, 1977
Inventors
Dionisio G. Cuisia
Chih M. Hwa
Jose T. Jacob
Murrell L. Salutsky
Assignee (at issue)
Chemed Corporation
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.