Granted Patent
Utility
US 4,587,294 · App. 06/545,167
Continuous process for producing rubber modified high-impact resins
Inventors:
Tetsuyuki Matsubara, Norifumi Ito, Kouzo Ichikawa, Kouichi Arahari, Tetsuo Maeda
Patented Case
View Patent ↗
Granted: May 6, 1986
Filed: Oct 25, 1983
Inventors
Tetsuyuki Matsubara
Norifumi Ito
Kouzo Ichikawa
Kouichi Arahari
Tetsuo Maeda
Assignees (at issue)
Mitsui Toatsu Chemicals, Incorporated
TOYO ENGINEERING CORPORATION
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.