Granted Patent
Utility
US 4,385,901 · App. 06/271,866
Readily dispersible dye preparations
Inventor:
Nitya G. Podder
Patented Case
View Patent ↗
Granted: May 31, 1983
Filed: Jun 9, 1981
Inventor
Nitya G. Podder
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.