Granted Patent
Utility
US 5,662,739 · App. 08/368,898
Use of fatty acid taurides for the dispersion of polycyclic pigments
Inventors:
Manfred Urban, Erwin Dietz
Patented Case
View Patent ↗
Granted: Sep 2, 1997
Filed: Jan 5, 1995
Inventors
Manfred Urban
Erwin Dietz
Assignee (at issue)
Hoechst GmbH
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.