Granted Patent
Utility
US 5,282,897 · App. 07/928,826
Process for improving storage stability of pigments
Inventors:
Phillipe Bugnon, Abul Iqbal, Iain Frank Fraser, Wern T. Tsai
Patented Case
View Patent ↗
Granted: Feb 1, 1994
Filed: Aug 11, 1992
Inventors
Phillipe Bugnon
Abul Iqbal
Iain Frank Fraser
Wern T. Tsai
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.