Granted Patent
Utility
US 5,741,920 · App. 08/469,596
Inhibition of re-absorption of migrating dyes in the wash liquor
Inventors:
Claude Eckhardt, Dieter Reinehr
Patented Case
View Patent ↗
Granted: Apr 21, 1998
Filed: Jun 6, 1995
Inventors
Claude Eckhardt
Dieter Reinehr
Assignee (at issue)
Ciba Specialty Chemicals Corporation
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.