Granted Patent
Utility
US 6,037,422 · App. 08/112,986
Polyarylene sulfide resin compositions
Inventors:
Shinobu Yamao, Wataru Kosaka
Patented Case
View Patent ↗
Granted: Mar 14, 2000
Filed: Aug 30, 1993
Inventors
Shinobu Yamao
Wataru Kosaka
Assignee (at issue)
Idemitsu Petrochemical Co., Ltd.
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.