Granted Patent
Utility
US 4,695,601 · App. 06/929,445
Polyphenylene ether thermoplastic protected from discoloration during processing
Inventor:
Yuval Halpern
Patented Case
View Patent ↗
Granted: Sep 22, 1987
Filed: Nov 12, 1986
Inventor
Yuval Halpern
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.