Granted Patent
Utility
US 4,851,589 · App. 07/098,814
Oxidative coupling of alkylphenols by copper catalysts
Inventors:
Michael Duane Cliffton, Stephen J. Carter
Patented Case
View Patent ↗
Granted: Jul 25, 1989
Filed: Sep 18, 1987
Inventors
Michael Duane Cliffton
Stephen J. Carter
Assignee (at issue)
Amoco 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.