Granted Patent
Utility
US 4,270,918 · App. 05/972,621
Reactive dyes, processes for their production and use thereof
Inventor:
Karl Seitz
Patented Case
View Patent ↗
Granted: Jun 2, 1981
Filed: Dec 22, 1978
Inventor
Karl Seitz
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.