Granted Patent
Utility
US 4,370,187 · App. 06/217,577
Process and apparatus for producing a laminated structure composed of a substrate web and a thermoplastic resin web extrusion-coated thereon
Inventors:
Mikio Katagiri, Yukio Sakota, Kunie Hiroshige, Yukio Adachi
Patented Case
View Patent ↗
Granted: Jan 25, 1983
Filed: Dec 18, 1980
Inventors
Mikio Katagiri
Yukio Sakota
Kunie Hiroshige
Yukio Adachi
Assignee (at issue)
Mitsui Polychemicals 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.