Granted Patent
Utility
US 5,304,244 · App. 08/018,616
Zwitterionic pigments
Inventors:
Jurgen Goldmann, Bansi Lal Kaul
Patented Case
View Patent ↗
Granted: Apr 19, 1994
Filed: Feb 17, 1993
Inventors
Jurgen Goldmann
Bansi Lal Kaul
Assignee (at issue)
Sandoz AG
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.