Granted Patent
Utility
US 4,972,024 · App. 07/224,329
Anionically-polymerized-rubber-modified styrene copolymers
Inventors:
Mune Iwamoto, Norifumi Ito, Kazuo Sugazaki, Tetsuyuki Matsubara, Toshihiko Ando, Yasuo Furuta
Patented Case
View Patent ↗
Granted: Nov 20, 1990
Filed: Jul 26, 1988
Inventors
Mune Iwamoto
Norifumi Ito
Kazuo Sugazaki
Tetsuyuki Matsubara
Toshihiko Ando
Yasuo Furuta
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.