Granted Patent
Utility
US 4,315,069 · App. 06/186,098
Color coupler combination
Inventors:
John G. V. Scott, Anthony K. Harvey
Patented Case
View Patent ↗
Granted: Feb 9, 1982
Filed: Sep 11, 1980
Inventors
John G. V. Scott
Anthony K. Harvey
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.