Tadashi Doi

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Toyonaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Packing material for chromatographic use
- Patent number 4,963,254
- Issue date Oct 16, 1990
- Sumitomo Chemical Company, Limited
- Naobumi Oi
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Packing materials for chromatographic use and a method for analysis...
- Patent number 4,604,207
- Issue date Aug 5, 1986
- Sumitomo Chemical Co., Ltd.
- Naobumi Oi
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Emulsifier composition for asphalt emulsion
- Patent number 4,172,046
- Issue date Oct 23, 1979
- Kao Soap Co., Ltd.
- Tadashi Doi
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for preparation of asphalt-epoxy resin composition
- Patent number 4,162,998
- Issue date Jul 31, 1979
- Kao Soap Co., Ltd.
- Tadashi Doi
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...