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Tatuo Ohoka
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Izumi, JP
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last 30 patents
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Patent Grant
Process for recovering a mixture of unreacted ethylene and propylene
Patent number
4,762,897
Issue date
Aug 9, 1988
Mitsui Toatsu Chemicals, Incorporated
Tadashi Asanuma
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Purification process of polymerization solvent
Patent number
4,725,338
Issue date
Feb 16, 1988
Mitsui Toatsu Chemicals, Incorporated
Tadashi Asanuma
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Method of continuously operating a counter-flow washing column
Patent number
4,659,755
Issue date
Apr 21, 1987
Mitsui Toatsu Chemicals, Incorporated
Tadashi Asanuma
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Process for the continuous discharge of a slurry
Patent number
4,632,976
Issue date
Dec 30, 1986
Mitsui Toatsu Chemicals, Inc.
Tadashi Asanuma
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...