Granted Patent
Utility
US 5,203,876 · App. 07/660,227
Process for dyeing paper
Inventor:
Adolf Kaser
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: Feb 22, 1991
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.