Granted Patent
Utility
US 5,314,858 · App. 07/961,739
Vinyl acetate catalyst preparation method
Inventor:
Philip M. Colling
Patented Case
View Patent ↗
Granted: May 24, 1994
Filed: Oct 14, 1992
Inventor
Philip M. Colling
Assignee (at issue)
Hoechst Celanese 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.