Granted Patent
Utility
US 4,885,337 · App. 07/069,967
Process for the preparation of thermoplastic moulding compositions
Inventors:
Herbert Eichenauer, Alfred Pischtschan, Karl-Heinz Ott
Patented Case
View Patent ↗
Granted: Dec 5, 1989
Filed: Jul 6, 1987
Inventors
Herbert Eichenauer
Alfred Pischtschan
Karl-Heinz Ott
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.