Granted Patent
Utility
US 4,519,956 · App. 06/515,748
Process for selectively preparing acetic anhydride by carbonylation of methyl acetate in the presence of an iodide-free catalyst system
Inventors:
Jiang-Jen Lin, Roger G. Duranleau
Patented Case
View Patent ↗
Granted: May 28, 1985
Filed: Jul 21, 1983
Inventors
Jiang-Jen Lin
Roger G. Duranleau
Assignee (at issue)
Texaco Inc.
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.