US Patent No: 4,904,512

Number of patents in Portfolio can not be more than 2000

Compression-molded article having multilayer structure

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

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.

Loading the Abstract Image... loading....

First Claim

See full text

all claims..

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
TOYO SEIKAN KAISHA, LTD.TOKYO259

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kawaguchi, Kiyoshi Tachikawa, JP 65 710
Yamada, Muneki Ookawa-shi, JP 39 732

Cited Art Landscape

Patent Info (Count) # Cites Year
 
PECHINEY EMBALLAGE FLEXIBLE EUROPE (2)
* 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 25 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 129 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 44 1983
 
VAJS, HELENE (1)
* 4,663,226 Fire retardant 23 1986
* Cited By Examiner

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
* Cited By Examiner