Granted Patent
Utility
US 4,729,796 · App. 06/311,253
Process for preparing pigment granules from aqueous suspension of pigment and alkaline solution of resin
Inventors:
Reinhold Deubel, Christa Uhde nee Schilling, Werner Marx
Patented Case
View Patent ↗
Granted: Mar 8, 1988
Filed: Oct 14, 1981
Inventors
Reinhold Deubel
Christa Uhde nee Schilling
Werner Marx
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.