Granted Patent
Utility
US 6,627,770 · App. 09/645,642
Method and apparatus for sequesting entrained and volatile catalyst species in a carbonylation process
Inventors:
Hung-Cheun Cheung, Valerie Santillan, Mark O. Scates, Elaine C. Sibrel, G. Paull Torrence
Patented Case
View Patent ↗
Granted: Sep 30, 2003
Filed: Aug 24, 2000
Inventors
Hung-Cheun Cheung
Valerie Santillan
Mark O. Scates
Elaine C. Sibrel
G. Paull Torrence
Assignee (at issue)
Celanese International Corporation
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.