Granted Patent
Utility
US 4,670,508 · App. 06/688,400
Thermoplastic resin composition
Inventors:
Akio Ohdaira, Michiharu Suga, Akifumi Kato, Toshio Kobayashi, Akira Yokoyama
Patented Case
View Patent ↗
Granted: Jun 2, 1987
Filed: Jan 2, 1985
Inventors
Akio Ohdaira
Michiharu Suga
Akifumi Kato
Toshio Kobayashi
Akira Yokoyama
Assignee (at issue)
Mitsui Petrochemical Industries, 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.