Granted Patent
Utility
US 4,804,767 · App. 07/079,053
Process for the preparation of disperse dyes
Inventor:
Adolf Kaser
Patented Case
View Patent ↗
Granted: Feb 14, 1989
Filed: Jul 29, 1987
Inventor
Adolf Kaser
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.