Granted Patent
Utility
US 5,115,039 · App. 07/711,364
Polyacrylate esters with quaternary ammonium groups
Inventors:
Jurgen Fock, Dietmar Schaefer, Eberhard Esselborn
Patented Case
View Patent ↗
Granted: May 19, 1992
Filed: Jun 5, 1991
Inventors
Jurgen Fock
Dietmar Schaefer
Eberhard Esselborn
Assignee (at issue)
Th. Goldschmidt. AG
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.