US Patent No: 4,904,512

Number of patents in Portfolio can not be more than 2000

Compression-molded article having multilayer structure

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Abstract

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A multilayer compression-molded article produced by compression-molding a composite plastic material. The composite plastic material comprises a first synthetic resin and a second synthetic resin in which the first synthetic resin surrounds substantially the entire second synthetic resin. The compression-molded article comprises a first resin layer molded from the first synthetic resin and a second resin layer molded from the second synthetic resin in which the first resin layer surrounds substantially the entire second resin layer. The composite plastic material is obtained by an extrusion apparatus which intermittently extrudes the second synthetic resin via a subsidiary extrusion flow passage into a main extrusion flow passage in which the first synthetic resin flows.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
TOYO SEIKAN KAISHA, LTD.TOKYO535

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kawaguchi, Kiyoshi Tachikawa, JP 65 695
Yamada, Muneki Ookawa-shi, JP 37 718

Cited Art Landscape

Patent Info (Count) # Cites Year
 
PECHINEY EMBALLAGE FLEXIBLE EUROPE (3)
4,526,821 Multi-layer container and method of making same 39 1979
4,525,134 Apparatus for making a multi-layer injection blow molded container 53 1981
4,568,261 Apparatus for making a multi-layer injection blow molded container 24 1985
 
Ex-Cell-O Corporation (1)
4,572,856 Composite molded article and process using self-positioning laminated stiffener 30 1984
 
H-C PLASTIC, INC., A DE CORP. (1)
4,497,765 Process for making a closure 128 1982
 
ROBERT BOSCH GMBH (1)
7,201,123 Method and device for operating an internal combustion engine of a vehicle 3 2004
 
Sekisui Kaseihin Kogyo Kabushiki Kaisha (1)
4,528,221 Polystyrene foamed sheet suitable for forming 43 1983
 
VAJS, HELENE (1)
4,663,226 Fire retardant 21 1986

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
TOYO SEIKAN KAISHA, LTD. (2)
5,403,529 Method for forming composite synthetic resin material 7 1993
8,673,197 Multi-layer structure and method of producing the same 0 2011
 
DEGUSSA AG (1)
5,362,570 Thermoplastic multilayer composites 15 1992
 
KURARAY CO., LTD. (1)
7,182,986 Container cap 1 1998
 
OWENS-ILLINOIS PLASTIC PRODUCTS INC., A CORP. OF DE. (1)
5,011,720 Multilayer containers and method of making same 13 1989

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