Granted Patent
Utility
US 5,194,465 · App. 07/769,916
Stabilized styrene copolymers containing elastomer particles modified with a hindered amine
Inventors:
Bernard Gilg, Gerhard Rytz, Werner Stauffer, Margot Clauss
Patented Case
View Patent ↗
Granted: Mar 16, 1993
Filed: Sep 30, 1991
Inventors
Bernard Gilg
Gerhard Rytz
Werner Stauffer
Margot Clauss
Assignee (at issue)
Ciba-Geigy
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.