Granted Patent
Utility
US 5,462,564 · App. 08/259,651
Inhibition of re-absorption of migrating dyes in the wash liquor
Inventors:
Claude Eckhardt, Dieter Reinehr
Patented Case
View Patent ↗
Granted: Oct 31, 1995
Filed: Jun 14, 1994
Inventors
Claude Eckhardt
Dieter Reinehr
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.