Granted Patent
Utility
US 5,302,196 · App. 07/756,821
Modified cellulose ethers and the use thereof in dispersion paints
Inventors:
Christoph Meister, Reinhard Donges, Walter Schermann, Walter Schrattenholz
Patented Case
View Patent ↗
Granted: Apr 12, 1994
Filed: Sep 9, 1991
Inventors
Christoph Meister
Reinhard Donges
Walter Schermann
Walter Schrattenholz
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.