Granted Patent
Utility
US 6,489,437 · App. 09/349,234
Polyarylene sulfide resin composition
Inventors:
Masaya Okamoto, Toru Bando
Patented Case
View Patent ↗
Granted: Dec 3, 2002
Filed: Jul 8, 1999
Inventors
Masaya Okamoto
Toru Bando
Assignees (at issue)
IDEMITSU KOSAN CO., LTD.
Idemitsu Petrochemical Co., Ltd.
PETROLEUM ENERGY CENTER
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.