Patents by Inventor Honai Shirasawa

Honai Shirasawa 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 industrially separating biopolymers
    Patent number: 4859342
    Abstract: A process and an apparatus for separating industrially a large amount of a biopolymer-containing sample by ion-exchange type column chromatography using the gradient elution method, wherein at least two precursor liquids for a mobile phase from liquid baths 3a and 3b are introduced into a mixing device 14 while the flow rate thereof is controlled over a wide range to obtain a mobile phase liquid. The mobile phase liquid thus obtained is introduced into the columns 1a and 1b so that the sample is separated in the columns and the biopolymer is collected in a fraction collector 6. The columns 1a and 1b are alternately regenerated.
    Type: Grant
    Filed: June 14, 1988
    Date of Patent: August 22, 1989
    Assignees: Suntory Limited, Soken Kagaku Kabushiki Kaisha
    Inventors: Honai Shirasawa, Hiroto Sugeno, Shigeo Eto, Hiroshi Saito