Granted Patent
Utility
US 6,482,893 · App. 09/664,651
Method of improving the weatherbility and color retention performance of styrene copolymer compositions
Inventors:
Gary Kogowski, Heiner Goerrissen, Graham E. McKee
Patented Case
View Patent ↗
Granted: Nov 19, 2002
Filed: Sep 19, 2000
Inventors
Gary Kogowski
Heiner Goerrissen
Graham E. McKee
Assignee (at issue)
BASF SE
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.