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Daigo Shirota
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Ichihara, JP
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Patents Grants
last 30 patents
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Patent Grant
Method of treating by-product salt yielded with polyarylene sulfide
Patent number
6,939,942
Issue date
Sep 6, 2005
Petroleum Energy Center, A Jurdical Incorporated Foundation
Daigo Shirota
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Process for treating by-product of polyarylene sulfide
Patent number
6,646,105
Issue date
Nov 11, 2003
Petroleum Energy Center
Daigo Shirota
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Process for preparing polyarylene sulfides under reduced pressure
Patent number
5,194,580
Issue date
Mar 16, 1993
Idemitsu Petrochemical Co., Ltd.
Yoshinari Koyama
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Method for recovery of solvent used in production of polyarylene su...
Patent number
5,167,775
Issue date
Dec 1, 1992
Idemitsu Petrochemical Co., Ltd.
Masao Omori
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Process for washing powdery and/or granular resins and a washing de...
Patent number
5,143,554
Issue date
Sep 1, 1992
Idemitsu Petrochemical Company Limited
Yoshinari Koyama
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Method of recovering a lithium chloride
Patent number
4,919,911
Issue date
Apr 24, 1990
Idemitsu Petrochemical Company Limited
Daigo Shirota
C01 - INORGANIC CHEMISTRY
Patents Applications
last 30 patents
Information
Patent Application
Method of treating by-product salt yieled with polyarylene sulfide
Publication number
20040087758
Publication date
May 6, 2004
Daigo Shirota
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Application
Process for treating by-product of polyarylene sulfide
Publication number
20020143140
Publication date
Oct 3, 2002
Petroleum Energy Center
Daigo Shirota
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...