US Patent No: 4,528,221

Number of patents in Portfolio can not be more than 2000

Polystyrene foamed sheet suitable for forming

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Abstract

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A polystyrene foamed sheet suitable for thermoforming and containers such as cups or trays formed therefrom, the foamed sheet comprising a polystyrene resin as the base resin which contains a specific quantity of each a rubber component and a filler, having specific bulk density, thickness, stretch ratio and residual gas quantity, and said sheet being preferably laminated with a film.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SEKISUI KASEIHIN KOGYO KABUSHIKI KAISHANARA67

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Komatsuzaki, Nobuyuki Koga, JP 2 57
Machida, Bon Koga, JP 3 104
Tsubone, Masahiro Ibaraki, JP 13 231

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Sekisui Kaseihin Kogyo Kabushiki Kaisha (2)
4,426,065 Continuous process for the production of polystyrene foamed articles 14 1981
4,463,861 Sheet for forming sleeve and process for producing the same 47 1983

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
PACTIV LLC (13)
5,939,463 High productivity, low fugitive VOC emission foam process 3 1997
6,136,875 High productivity, low fugitive emission foams and foam processes 11 1999
7,166,248 Reduced VOC emission alkenyl aromatic polymer foams and processes 8 2003
7,814,647 Reinforced plastic foam cup, method of and apparatus for manufacturing same 1 2005
7,704,347 Reinforced plastic foam cup, method of and apparatus for manufacturing same 5 2005
7,694,843 Reinforced plastic foam cup, method of and apparatus for manufacturing same 7 2005
7,552,841 Reinforced plastic foam cup, method of and apparatus for manufacturing same 22 2005
7,536,767 Method of manufacturing a reinforced plastic foam cup 11 2005
7,818,866 Method of reinforcing a plastic foam cup 2 2006
7,918,005 Reinforced foam cup, method of and apparatus for manufacturing same 1 2009
8,087,147 Method of reinforcing a plastic foam cup 1 2010
7,918,016 Reinforced plastic foam cup, method of and apparatus for manufacturing same 2 2010
8,622,208 Reinforced cup 0 2011
 
The Dow Chemical Company (5)
5,389,694 Foamable styrenic polymer gel having a carbon dioxide blowing agent and a process for making a foam structure therefrom 8 1993
5,688,832 Low molecular weight alkenyl aromatic polymer foam 5 1996
5,674,916 Extruded, open-cell microcellular alkenylaromatic polymer foams and process for making 15 1997
5,863,960 Extruded, open-cell microcellular alkenyl aromatic polymer foams, process for making and articles made therefrom 4 1997
5,780,521 Extruded, open-cell microcellular alkenyl aromatic polymer foams, process for making, and articles made therefrom 13 1997
 
AVERY DENNISON CORPORATION (3)
6,150,013 Low thermal conductivity in-mold label films 28 1996
6,758,000 Livestock security tag assembly 8 2001
6,716,501 Multilayered film 5 2002
 
IDEMITSU KOSAN CO., LTD. (3)
6,013,726 Composition of styrene resin, thermoplastic resin and rubber 16 1995
5,891,951 Styrene-based resin composition 5 1995
5,683,801 Styrenic resin laminate and molding thereof 3 1996
 
CCL LABEL, INC. (2)
6,756,095 Heat-sealable laminate 24 2001
6,773,653 In-mold labeling method 69 2001
 
GRUPO CONVERMEX, S.A. DE C.V. (2)
8,105,459 Method and apparatus for producing labeled, plastic foam containers, and product of same 0 2010
8,617,681 Method and apparatus for producing labeled, plastic foam containers, and product of same 0 2012
 
NAGOYA OILCHEMICAL CO., LTD. (2)
5,328,723 Masking member 6 1991
5,206,069 Panel type masking member 1 1992
 
RENSSELAER POLYTECHNIC INSTITUTE (2)
5,334,450 Weatherable styrenic film structures with intermediate tie layer and laminates thereof 20 1992
5,306,548 Coextruded weatherable film structures and laminates 49 1992
 
DAINIPPON INK AND CHEMICALS, INC. (1)
4,835,041 Biaxially stretched composite styrene resin sheet 3 1987
 
FUJI SEAL INTERNATIONAL, INC. (1)
5,861,201 Multilayer label material 34 1997
 
Mobil Oil Corporation (1)
4,832,775 Composite structure based on polystyrene foam and oriented polypropylene film and thermo-formed articles fabricated therefrom 35 1987
 
NOVA CHEMICALS INC. (1)
7,252,866 Thermoplastic film for a disposable container made of expandable thermoplastic particles 3 2002
 
OWENS-ILLINOIS, INC. (1)
5,405,667 Plastic container with multilayer label applied by in-mold labeling 17 1992
 
PREGIS INNOVATIVE PACKAGING, INC. (1)
7,045,556 Polyolefin foams made with isopentane-based blowing agents 9 2002
 
SOLO CUP OPERATING CORPORATION (1)
5,362,436 Polystyrene foam sheet useful for forming deep drawn articles, a process to produce those articles, and the deep drawn articles 30 1993
 
STYRON EUROPE GMBH (1)
5,364,696 Polystyrene foam sheet useful for forming deep drawn articles, a process to produce those articles, and the deep drawn articles 7 1994
 
TENNECO PLASTICS COMPANY (1)
5,356,944 High melt index polystytene foam and method 16 1994
 
TOYO SEIKAN KAISHA, LTD. (1)
4,904,512 Compression-molded article having multilayer structure 5 1987
 
Other [Check patent profile for assignment information] (1)
6,492,012 Polymer penetrated porous substrates 1 2000