TREA

Shunro Nagata

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Process for purifying silica
    • Patent number 4,676,964
    • Issue date Jun 30, 1987
    • Kawatetsu Mining Company, Ltd.
    • Akira Seki
    • C01 - INORGANIC CHEMISTRY

Patents Applicationslast 30 patents