Granted Patent
Utility
US 5,504,162 · App. 08/177,163
Salts of copolymers of ethylenically unsaturated carboxylic acids and ethylenically unsaturated fatty acid derivatives
Inventors:
Herbert Friedrich, Bernhard Mees, Richard Gruber
Patented Case
View Patent ↗
Granted: Apr 2, 1996
Filed: Jan 4, 1994
Inventors
Herbert Friedrich
Bernhard Mees
Richard Gruber
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.