Granted Patent
Utility
US 6,228,916 · App. 09/381,575
Conjugated diene polymer composition and rubber-reinforced styrene resin
Inventors:
Masao Sato, Tomohiro Iihara, Masahiro Sasagawa
Patented Case
View Patent ↗
Granted: May 8, 2001
Filed: Sep 22, 1999
Inventors
Masao Sato
Tomohiro Iihara
Masahiro Sasagawa
Assignee (at issue)
ASAHI KASEI KOGYO 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.