Granted Patent
Utility
US 6,403,747 · App. 09/422,524
Process for preparation of butyl rubber using activated alkylaluminum halides
Inventor:
Adam Gronowski
Patented Case
View Patent ↗
Granted: Jun 11, 2002
Filed: Oct 21, 1999
Inventor
Adam Gronowski
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.