Patents by Inventor Kinichi Saito

Kinichi Saito 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).

  • Sodium N-acetylneuraminate trihydrate
    Patent number: 5231177
    Abstract: Sodium N-acetylneuraminate trihydrate herein provided is represented by the following formula: ##STR1## The sodium N-acetylneuraminate trihydrate can be prepared, for instance, according to a method which comprises the steps of: dissolving sodium N-acetylneuraminate in water or in a mixture of water and an organic solvent; allowing the resulting solution to stand; precipitating and separating the resulting crystals of sodium N-acetylneuraminate.trihydrate; and then drying the separated crystals. The sodium N-acetylneuraminate trihydrate has very low hygroscopicity and hence can be handled without any difficulty in the form of powder.
    Type: Grant
    Filed: March 5, 1990
    Date of Patent: July 27, 1993
    Assignee: Mect Corporation
    Inventors: Kinichi Saito, Hideo Mizu, Naokazu Sugiyama, Shikoh Minagawa, Motoaki Goto, Kenji Abiko