Granted Patent
Utility
US 6,239,218 · App. 09/057,404
Hydrogenated block copolymer and composition of the same
Inventors:
Jun Yonezawa, Kiyoo Kato, Eiji Sasaya, Takashi Sato
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: Apr 9, 1998
Inventors
Jun Yonezawa
Kiyoo Kato
Eiji Sasaya
Takashi Sato
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.