Granted Patent
Utility
US 5,457,203 · App. 08/122,025
Pigmentary synthesis of quinacridone solid solutions
Inventors:
Shivakumar Basalingappa Hendi, Edward E. Jaffe
Patented Case
View Patent ↗
Granted: Oct 10, 1995
Filed: Sep 15, 1993
Inventors
Shivakumar Basalingappa Hendi
Edward E. Jaffe
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.