Granted Patent
Utility
US 6,228,938 · App. 08/262,745
ABS materials
Inventors:
Herbert Eichenauer, Karl-Heinz Ott, Dieter Wittmann, Alfred Pischtschan
Patented Case
View Patent ↗
Granted: May 8, 2001
Filed: Jun 20, 1994
Inventors
Herbert Eichenauer
Karl-Heinz Ott
Dieter Wittmann
Alfred Pischtschan
Assignee (at issue)
Bayer Aktiengesellschaft
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.