Granted Patent
Utility
US 4,463,164 · App. 06/466,746
Process for preparing polyphenylene ethers
Inventors:
William O. Dalton, Michael K. Rinehart, Akitoshi Sugio
Patented Case
View Patent ↗
Granted: Jul 31, 1984
Filed: Feb 15, 1983
Inventors
William O. Dalton
Michael K. Rinehart
Akitoshi Sugio
Assignee (at issue)
Borg-Warner Chemicals, 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.