Granted Patent
Utility
US 4,777,235 · App. 07/068,972
Production of polyarylene ether from activated dihalo benzenoid monomer, dihydroxy benzenoid monomer and Bis(hydroxyphenyl) monomer
Inventors:
Donald R. Kelsey, Robert A. Clendinning, George T. Kwiatkowski
Patented Case
View Patent ↗
Granted: Oct 11, 1988
Filed: Jul 1, 1987
Inventors
Donald R. Kelsey
Robert A. Clendinning
George T. Kwiatkowski
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.