Granted Patent
Utility
US 5,756,654 · App. 08/701,175
Process for manufacturing polyarylene sulfide
Inventors:
Kiyoshi Sase, Kohji Namiki, Tetsuro Takeya
Patented Case
View Patent ↗
Granted: May 26, 1998
Filed: Aug 21, 1996
Inventors
Kiyoshi Sase
Kohji Namiki
Tetsuro Takeya
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.