Patents by Inventor Mituo Nagata

Mituo Nagata 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).

  • Patent number: 4468330
    Abstract: A filler for liquid chromatography, said filler consisting essentially of a hydrophilic ion-exchanger obtained by copolymerizing a mixture of (A) 5 to 90% by weight of a polymerizable monomer containing one polymerizable double bond and at least one carboxyl group per molecule and having a hydrophobic parameter of not more than 2.3, (B) 10 to 95% by weight of a crosslinkable polymerizable monomer containing at least two polymerizable double bonds per molecule and having a hydrophobic parameter of not more than 2.3, and (C) 0 to 85% by weight of a monomer being different from the monomer (A), containing one polymerizable double bond per molecule and having a hydrophobic parameter of not more than 2.3; and a method for separating a biological material such as proteins, enzymes and amino acids by liquid chromatography using the aforesaid filler.
    Type: Grant
    Filed: April 23, 1982
    Date of Patent: August 28, 1984
    Assignee: Sekisui Kagaku Kogyo Kabushiki Kaisha
    Inventors: Fumio Kamiyama, Minoru Kohara, Mituo Nagata, Yasuhiko Araki
  • Patent number: 4447328
    Abstract: A liquid-chromatographic filler comprising a particulate synthetic polymer, such as glycerol di or tri (meth) acrylate wherein the filler exhibits a behavior such that in chromatography using polyethylene glycol as a sample and water as an eluent, the elution time of the sample increases with a rise in temperature. Separation of water-soluble substances by liquid chromatography can be achieved by using an aqueous medium as an eluent, and this filler.
    Type: Grant
    Filed: February 16, 1982
    Date of Patent: May 8, 1984
    Assignee: Sekisu Kagaku Kogyo Kabushiki Kaisha
    Inventors: Fumio Kamiyama, Kazutoshi Yamazaki, Minoru Kohara, Mituo Nagata