Granted Patent
Utility
US 5,541,261 · App. 08/379,222
Polymethacrylate-polymethacrylic acid block copolymers
Inventors:
Jurgen Fock, Arno Knebelkamp
Patented Case
View Patent ↗
Granted: Jul 30, 1996
Filed: Jan 27, 1995
Inventors
Jurgen Fock
Arno Knebelkamp
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.