Patents by Inventor Takashi Kombu

Takashi Kombu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for isolating and recovering erthritol from culture medium containing the same
    Patent number: 4906569
    Abstract: A process for readily isolating and recovering highly pure erythritol at a high crystallization yield from an erythritol-containing culture medium, which contains erythritol together with various impurities such as salts, coloring materials and polysaccharides, through chromatographic separation with the use of a strongly acidic cation exchange resin. The process of the present invention can be continuously operated, since the lowered separation capability of said cation exchange resin can be readily restored by treating the same with a warm alkali solution.
    Type: Grant
    Filed: January 31, 1989
    Date of Patent: March 6, 1990
    Assignees: Mitsubishi Kasei Corporation, Nikken Chemicals Company, Limited
    Inventors: Toshihiro Maeda, Isao Nakazawa, Takashi Kombu