Granted Patent
Utility
US 4,734,209 · App. 06/718,907
Metal deactivators
Inventors:
Emyr Phillips, Brian Holt
Patented Case
View Patent ↗
Granted: Mar 29, 1988
Filed: Apr 2, 1985
Inventors
Emyr Phillips
Brian Holt
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.