Granted Patent
Utility
US 4,560,388 · App. 06/598,951
Process for dyeing silk or fibre blends containing silk
Inventor:
Rudolf Rohrer
Patented Case
View Patent ↗
Granted: Dec 24, 1985
Filed: Apr 11, 1984
Inventor
Rudolf Rohrer
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.