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Kazuyoshi Kuroishi
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Tochigi, JP
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last 30 patents
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Patent Grant
Rigid polyurethane foam and process for producing the same
Patent number
5,216,040
Issue date
Jun 1, 1993
Hitachi, Ltd.
Kazuyoshi Kuroishi
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Rigid polyurethane foam and heat insulator obtained therefrom
Patent number
5,173,517
Issue date
Dec 22, 1992
Hitachi, Ltd.
Kazuyoshi Kuroishi
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Rigid polyurethane foam, process for producing the same, and heat i...
Patent number
5,034,425
Issue date
Jul 23, 1991
Hitachi, Ltd.
Kazuyoshi Kuroishi
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Rigid polyurethane foam and process for producing the same
Patent number
RE33290
Issue date
Aug 7, 1990
Hitachi, Ltd.
Reishi Naka
521 - Synthetic resins or natural rubbers
Information
Patent Grant
Rigid polyurethane foam and process for producing the same
Patent number
4,742,089
Issue date
May 3, 1988
Hitachi, Ltd.
Reishi Naka
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...