Granted Patent
Utility
US 5,969,205 · App. 09/137,860
Process for preparing C.sub.4 --C.sub.6 --alkenes having an internal double bond comprising recycling a portion of a product stream
Inventors:
Arnd Stuwe, Jorg Michel, Matthias Baum, Franz Kaledat
Patented Case
View Patent ↗
Granted: Oct 19, 1999
Filed: Aug 21, 1998
Inventors
Arnd Stuwe
Jorg Michel
Matthias Baum
Franz Kaledat
Assignee (at issue)
EC Erdolchemie 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.