Granted Patent
Utility
US 6,632,972 · App. 09/930,267
Process for the selective preparation of DIB from an i-butene-containing C4 stream
Inventors:
Alexander Gammersbach, Axel Gohrt, Joachim Grub, Stefan Kaminsky, Hans-Joachim Kramer
Patented Case
View Patent ↗
Granted: Oct 14, 2003
Filed: Aug 16, 2001
Inventors
Alexander Gammersbach
Axel Gohrt
Joachim Grub
Stefan Kaminsky
Hans-Joachim Kramer
Assignee (at issue)
BP KOLN GmbH
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.