Susumu Izawa

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Utsunomiya, JP

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Patents Grantslast 30 patents

Information Patent Grant
Production method of prefoamed particles of polyolefin resin
- Patent number 4,889,671
- Issue date Dec 26, 1989
- Japan Styrene Paper Corporation
- Hiroyuki Akiyama
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Heat treatment apparatus for polyolefin resin particles
- Patent number 4,716,021
- Issue date Dec 29, 1987
- Japan Styrene Paper Corp.
- Hiroyuki Akiyama
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Propylene-base random copolymer particles and production process th...
- Patent number 4,692,507
- Issue date Sep 8, 1987
- Japan Styrene Paper Corporation
- Hiroyuki Akiyama
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Propylene-base random copolymer particles and production process th...
- Patent number 4,602,082
- Issue date Jul 22, 1986
- Japan Styrene Paper Corporation
- Hiroyuki Akiyama
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for producing foamed polyolefin articles from aged pre-foam...
- Patent number 4,399,087
- Issue date Aug 16, 1983
- Japan Styrene Paper Corporation
- Hiroyuki Akiyama
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...