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Shigeki Yokoyama
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Yokohama, JP
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last 30 patents
Information
Patent Grant
Split polyethylene stretched material and process for producing the...
Patent number
5,578,373
Issue date
Nov 26, 1996
Nippon Oil Co., Ltd.
Seizo Kobayashi
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Laminate
Patent number
5,445,883
Issue date
Aug 29, 1995
Nippon Oil Co., Ltd.
Seizo Kobayashi
B32 - LAYERED PRODUCTS
Information
Patent Grant
Method for continuous preparation of polyethylene material having h...
Patent number
5,106,558
Issue date
Apr 21, 1992
Nippon Oil Co., Ltd.
Keizo Kobayashi
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Process for the continuous production of high-strength and high-mod...
Patent number
5,106,555
Issue date
Apr 21, 1992
Nippon Oil Co., Ltd.
Seizo Kobayashi
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Process for the production of polyethylene materials
Patent number
5,026,511
Issue date
Jun 25, 1991
Nippon Oil Co., Ltd.
Akira Sano
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Process for producing highly oriented polyethylene material
Patent number
5,002,714
Issue date
Mar 26, 1991
Nippon Oil Co., Ltd.
Akira Sano
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Process for producing polyethylene of ultrahigh molecular weight
Patent number
4,923,935
Issue date
May 8, 1990
Nippon Oil Co., Ltd.
Akira Sano
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Process for the production of polyethylene materials
Patent number
4,879,076
Issue date
Nov 7, 1989
Nippon Oil Co., Ltd.
Akira Sano
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Finish laminates for high frequency circuits
Patent number
4,812,355
Issue date
Mar 14, 1989
Nippon Petrochemicals Co., Ltd.
Shigeki Yokoyama
B32 - LAYERED PRODUCTS
Information
Patent Grant
Ultra-high-molecular-weight polyethylene solution
Patent number
4,767,819
Issue date
Aug 30, 1988
Nippon Petrochemicals Co., Ltd.
Shigeki Yokoyama
D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information
Patent Grant
Easily soluble polyethylene powder for the preparation of fibers or...
Patent number
4,760,120
Issue date
Jul 26, 1988
Nippon Oil Company, Limited
Akira Sano
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Chlorinated linear ultra low density polyethylene
Patent number
4,704,439
Issue date
Nov 3, 1987
Nippon Oil Company, Limited
Noboru Yamaoka
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Method for producing laminated sheets or films
Patent number
4,597,818
Issue date
Jul 1, 1986
Nippon Petrochemicals Company, Limited
Takeo Aoyama
B32 - LAYERED PRODUCTS