Granted Patent
Utility
US 6,268,522 · App. 09/089,627
Catalyst, process for its production and its use for preparing vinyl acetate
Inventors:
Alfred Hagemeyer, Uwe Dingerdissen, Klaus Kuhlein, Johannes Heitz, Dieter Bauerle
Patented Case
View Patent ↗
Granted: Jul 31, 2001
Filed: Jun 3, 1998
Inventors
Alfred Hagemeyer
Uwe Dingerdissen
Klaus Kuhlein
Johannes Heitz
Dieter Bauerle
Assignee (at issue)
Celanese 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.