Granted Patent
Utility
US 4,853,039 · App. 07/123,670
Process for making a phthalocyanine pigment dispersion
Inventors:
Thomas E. Donegan, John H. Bantjes, Timothy G. Leary
Patented Case
View Patent ↗
Granted: Aug 1, 1989
Filed: Nov 23, 1987
Inventors
Thomas E. Donegan
John H. Bantjes
Timothy G. Leary
Assignee (at issue)
BASF SE
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.