Granted Patent
Utility
US 6,649,789 · App. 10/173,906
Catalyst based on palladium, gold, alkali metal and lanthanoid and process for preparing vinyl acetate
Inventors:
Bernhard Herzog, Tao Wang, Toan Nicolau
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Jun 18, 2002
Inventors
Bernhard Herzog
Tao Wang
Toan Nicolau
Assignee (at issue)
CELANESE CHEMICALS EUROPE 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.