Patents by Inventor Yasuhisha Fukumoto

Yasuhisha Fukumoto 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).

  • Production of polymaleic acid
    Patent number: 4709091
    Abstract: A polymer or copolymer of maleic acid is produced by neutralizing (I) maleic acid in an aqueous medium with (III) an alkali metal hydroxide or ammonia at a molar ratio of (I) to (III) in the range of 100:0 to 100:90, polymerizing (I) with a polymerization initiator, adding (III) a further amount of the alkali metal hydroxide or ammonia at a molar ratio of (I) to (III) in the range of 100:100 to 100:130 in total through the previous addition and this addition and continuing the polymerization to the complete effect.
    Type: Grant
    Filed: March 27, 1985
    Date of Patent: November 24, 1987
    Assignee: Kao Corporation
    Inventors: Yasuhisha Fukumoto, Moboru Moriyama
  • Maleic acid copolymer, production thereof and scale-preventing agent containing the same
    Patent number: 4589995
    Abstract: Disclosed is a novel copolymer of maleic acid or a salt thereof and an adduct of an oxyalkylene and allyl alcohol, a molar ratio being from 5/100 to 50/50, a molecular weight thereof being from 400 to 20,000. The copolymer is useful as a scale-preventing agent.
    Type: Grant
    Filed: February 28, 1984
    Date of Patent: May 20, 1986
    Assignee: Kao Corporation
    Inventors: Yasuhisha Fukumoto, Noboru Moriyama, Takashi Itoi