Granted Patent
Utility
US 4,558,121 · App. 06/199,790
Sulfoethylaminosulfonyl substituted disazo dyes
Inventors:
Alfred Fasciati, Arthur Buhler
Patented Case
View Patent ↗
Granted: Dec 10, 1985
Filed: Oct 23, 1980
Inventors
Alfred Fasciati
Arthur Buhler
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.