Granted Patent
Utility
US 4,871,594 · App. 07/177,680
Use of aqueous cationic dispersions of synthetic resins for impregnating and priming of absorbent substrates
Inventors:
Erhard Bister, Hans-Ullrich Huth, Werner Stelzel
Patented Case
View Patent ↗
Granted: Oct 3, 1989
Filed: Apr 5, 1988
Inventors
Erhard Bister
Hans-Ullrich Huth
Werner Stelzel
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.