Granted Patent
Utility
US 4,778,655 · App. 06/920,394
Treatment of aqueous systems
Inventor:
Brian Greaves
Patented Case
View Patent ↗
Granted: Oct 18, 1988
Filed: Oct 20, 1986
Inventor
Brian Greaves
Assignee (at issue)
W. R. Grace & Co.
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.