Granted Patent
Utility
US 5,721,321 · App. 08/714,238
Polymethacrylic esters whose ester groups in position and differ from those in the chain
Inventors:
Jurgen Fock, Arno Knebelkamp
Patented Case
View Patent ↗
Granted: Feb 24, 1998
Filed: Sep 16, 1996
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.