Patents by Inventor Yoshihumi Nosaka

Yoshihumi Nosaka 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).

  • Sizing agent and paper sized therewith
    Patent number: 5374679
    Abstract: A sizing agent for paper, which comprises 100 parts by weight of a polyvinyl alcohol (component A) and from 1 to 20 parts by weight of a compound (component B provided with the following requisites (1) to (4):(1) the backbone chain is a random copolymer of ethylene oxide and propylene oxide, (2) in the backbone chain, the proportion of oxyethylene units is from 20 to 40% by weight, and the proportion of oxypropylene units is from 60 to 80% by weight, (3) of the two terminals, one terminal is a hydroxyl group, and the other terminal is a C.sub.1-10 alkoxyl group or a hydroxyl group, and (4) the weight average molecular weight is from 600 to 1,200.
    Type: Grant
    Filed: March 31, 1994
    Date of Patent: December 20, 1994
    Assignees: Denki Kagaku Kogyo Kabushiki Kaisha, Nippon Paper Industries Co., Ltd.
    Inventors: Yoshihumi Nosaka, Osamu Ishiguro
  • Sizing agent and paper sized therewith
    Patent number: 5248724
    Abstract: A sizing agent for paper, which comprises 100 parts by weight of a polyvinyl alcohol (component A) and from 1 to 20 parts by weight of a compound (component B) provided with the following requisites (1) to (4): (1) the backbone chain is a block copolymer of ethylene oxide and propylene oxide, (2) in the backbone chain, the proportion of oxyethylene units is from 20 to 40% by weight, and the proportion of oxypropylene units is from 60 to 80% by weight, (3) of the two terminals, one terminal is a hydrogen atom bonded to an oxygen atom of an oxyethylene unit or an oxypropylene unit, and the other terminal is a C.sub.1-10 alkoxyl group or a hydrogen atom bonded to an oxygen atom of an oxyethylene unit or an oxypropylene unit, and (4) the weight average molecular weight is from 600 to 1,200.
    Type: Grant
    Filed: February 21, 1992
    Date of Patent: September 28, 1993
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshihumi Nosaka, Osamu Ishiguro