Granted Patent
Utility
US 4,318,849 · App. 06/146,973
Novel metallized dyes, their manufacture and use
Inventors:
Arthur Buhler, Hans U. Schutz
Patented Case
View Patent ↗
Granted: Mar 9, 1982
Filed: May 5, 1980
Inventors
Arthur Buhler
Hans U. Schutz
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.