Granted Patent
Utility
US 5,326,491 · App. 08/055,643
Detergents containing certain sulfonated dibenzofuranylbiphenyls
Inventors:
Kurt Weber, Claude Eckhardt, Hans R. Meyer
Patented Case
View Patent ↗
Granted: Jul 5, 1994
Filed: Apr 30, 1993
Inventors
Kurt Weber
Claude Eckhardt
Hans R. Meyer
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.