Granted Patent
Utility
US 4,952,541 · App. 07/401,722
Acrylonitrile dimerization process and method of treating residual catalyst
Inventors:
William A. Heckle, Marion J. Mathews, III, P. Robert Peoples
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Sep 1, 1989
Inventors
William A. Heckle
Marion J. Mathews, III
P. Robert Peoples
Assignee (at issue)
Monsanto Company
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.