Granted Patent
Utility
US 4,844,742 · App. 07/051,098
Surface modified pigment compositions
Inventor:
Edward E. Jaffe
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: May 15, 1987
Inventor
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.