Granted Patent
Utility
US 5,695,843 · App. 08/722,903
Mixtures of symmetrical and unsymmetrical nickel formazan dyes
Inventors:
Derek D. Chapman, Ramanuj Goswami
Patented Case
View Patent ↗
Granted: Dec 9, 1997
Filed: Sep 27, 1996
Inventors
Derek D. Chapman
Ramanuj Goswami
Assignee (at issue)
EASTMAN KODAK COMPANY
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.