Granted Patent
Utility
US 5,281,269 · App. 07/944,591
Aqueous process for preparation of modified beta quinacridone
Inventors:
James B. Ganci, Shivakumar Basalingappa Hendi, Walter Zukowski
Patented Case
View Patent ↗
Granted: Jan 25, 1994
Filed: Sep 14, 1992
Inventors
James B. Ganci
Shivakumar Basalingappa Hendi
Walter Zukowski
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.