Granted Patent
Utility
US 4,834,770 · App. 07/065,802
Process for the simultaneous caustic treatment and dyeing of cotton goods
Inventor:
Peter Horn
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Jun 24, 1987
Inventor
Peter Horn
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.