Granted Patent
Utility
US 5,670,082 · App. 08/352,998
Bleaching auxiliary
Inventors:
Albert Stehlin, Klaus Huber, Thomas Maier
Patented Case
View Patent ↗
Granted: Sep 23, 1997
Filed: Dec 9, 1994
Inventors
Albert Stehlin
Klaus Huber
Thomas Maier
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.