Granted Patent
Utility
US 5,487,761 · App. 08/230,264
Process for dyeing paper with disazo dyes
Inventor:
Adolf Kaser
Patented Case
View Patent ↗
Granted: Jan 30, 1996
Filed: Apr 20, 1994
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.