Patents by Inventor Motokazu Kamei

Motokazu Kamei 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).

  • Aqueous dispersed solution of substituted succinic anhydride and process for producing the same
    Patent number: 4882087
    Abstract: An aqueous dispersed solution of a substituted succinic anhydride which comprises an aqueous soluble copolymer (A) having 50 percent or more by mol of (meth)acrylamide (a) 1 percent or more by mol of N,N-dialkylamino.alkyl(meth)acrylamide (b) as monomer ingredients, aqueous soluble copolymer (B) having 50 percent or more by mol of (meth)acrylamide (a), 1 percent or more by mol of N,N-dialkylamino.alkyl(metho)acrylamide (b) and 49 percent or less by mol of other copolymer monomer (c) as monomer ingredients, or both of the dqueous soluble copolymer (A) and the aqueous soluble copolymer (B), and a process for producing an aqueous dispersed solution of a substituted succinic anhydride prepared by dispersing the aqueous soluble copolymer (A) or the aqueous soluble copolymer (B) or a mixture (C) of 99 to 99.9 percent by weight of the substituted succinic anhydride (d) and 10 to 0.
    Type: Grant
    Filed: June 30, 1988
    Date of Patent: November 21, 1989
    Assignees: Seiko Kagaku Kogyo Co., Ltd., Nippon Co., Ltd., Hokuetsu Paper Mills, Ltd.
    Inventors: Shigehiko Yoshioka, Hideto Yamada, Hisatake Sato, Motokazu Kamei