Patents by Inventor Hiroko Fukuyama, heir

Hiroko Fukuyama, heir 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).

  • Paper coating composition
    Patent number: 5158611
    Abstract: A process for producing a resin is disclosed, comprising reacting (a) a polyalkylenepolyamine, (b) an alicyclic dibasic carboxylic acid and/or a reaction product having a free carboxyl group that is obtained by reacting an alicyclic dibasic carboxylic acid with a glycol, (c) a urea, and (d) an aldehyde and/or an alkylating agent. The resulting resin is useful as a wet strength agent to provide a paper coating composition having improved printability and printing effects.
    Type: Grant
    Filed: August 22, 1991
    Date of Patent: October 27, 1992
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Shigeru Ura, Haruo Tanaka, Hisao Takagishi, Yoshiya Fukuyama, deceased, Hiroko Fukuyama, heir, Takuya Fukuyama, heir, Yuko Fukuyama, heir