Granted Patent
Utility
US 5,145,486 · App. 07/654,139
Process for dyeing wool with reactive dyes
Inventor:
Klaus Hannemann
Patented Case
View Patent ↗
Granted: Sep 8, 1992
Filed: Feb 11, 1991
Inventor
Klaus Hannemann
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.