Granted Patent
Utility
US 4,617,129 · App. 06/751,647
Scale inhibition
Inventor:
Michael J. Lees
Patented Case
View Patent ↗
Granted: Oct 14, 1986
Filed: Jul 3, 1985
Inventor
Michael J. Lees
Assignee (at issue)
Ciba-Geigy
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.