Granted Patent
Utility
US 5,401,780 · App. 08/138,537
Acrylic polymer coated organic pigments
Inventors:
Philippe Bugnon, Fritz Herren
Patented Case
View Patent ↗
Granted: Mar 28, 1995
Filed: Oct 15, 1993
Inventors
Philippe Bugnon
Fritz Herren
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.