Granted Patent
Utility
US 4,808,661 · App. 06/899,867
Rubber dispersed copolymer resin
Inventors:
Mune Iwamoto, Norifumi Ito, Kazuo Sugazaki, Tetsuyuki Matsubara, Toshihiko Ando
Patented Case
View Patent ↗
Granted: Feb 28, 1989
Filed: Aug 25, 1986
Inventors
Mune Iwamoto
Norifumi Ito
Kazuo Sugazaki
Tetsuyuki Matsubara
Toshihiko Ando
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.