Granted Patent
Utility
US 4,827,031 · App. 07/051,965
Process for preparing amines from olefins with ammonium halide catalysts
Inventors:
David M. Gardner, Paul J. McElligott, Jr., Roger T. Clark
Patented Case
View Patent ↗
Granted: May 2, 1989
Filed: May 19, 1987
Inventors
David M. Gardner
Paul J. McElligott, Jr.
Roger T. Clark
Assignee (at issue)
Pennwalt 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.