Ichiro Ichikawa

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Chiba, JP

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Patents Grantslast 30 patents

Information Patent Grant
Positive photoresist aqueous developer solution containing quaterna...
- Patent number 4,741,989
- Issue date May 3, 1988
- Sumitomo Chemical Company, Limited
- Kenji Niwa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Method of purifying tantalum
- Patent number 4,673,554
- Issue date Jun 16, 1987
- Sumitomo Chemical Company, Limited
- Kenji Niwa
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Process for producing block copolymer from conjugated diene and vin...
- Patent number 4,220,738
- Issue date Sep 2, 1980
- Sumitomo Chemical Company, Limited
- Tamotsu Miki
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Method for producing transparent block copolymer resin
- Patent number 4,122,134
- Issue date Oct 24, 1978
- Sumitomo Chemical Company, Limited
- Tamotsu Miki
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...