Granted Patent
Utility
US 4,048,066 · App. 05/742,521
Method of inhibiting scale
Inventors:
Dionisio G. Cuisia, Chih M. Hwa
Patented Case
View Patent ↗
Granted: Sep 13, 1977
Filed: Nov 17, 1976
Inventors
Dionisio G. Cuisia
Chih M. Hwa
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.