Granted Patent
Utility
US 4,859,728 · App. 07/163,766
Pasty pigment formulations, production and use thereof
Inventors:
Manfred Schneider, Ulrich Ott, Alexander Sieber, Manfred Zimmermann
Patented Case
View Patent ↗
Granted: Aug 22, 1989
Filed: Mar 3, 1988
Inventors
Manfred Schneider
Ulrich Ott
Alexander Sieber
Manfred Zimmermann
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.