Patents by Inventor Toshiro Asakawa

Toshiro Asakawa 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: 4152421
    Abstract: A dentifrice composition containing as the active foaming agent (I) a monoalkyl phosphate ester salt and (II) a dialkyl phosphate ester salt, wherein said alkyls have 10 to 14 carbon atoms and the weight ratio of I:II is from 100:0 to 70:30.
    Type: Grant
    Filed: September 30, 1977
    Date of Patent: May 1, 1979
    Assignee: Kao Soap Co., Ltd.
    Inventors: Hisao Tsutsumi, Toshiro Asakawa, Shizuo Hayashi
  • Patent number: 4081526
    Abstract: A dentifrice composition comprising 0.5 to 5 wt.% of an alkali metal phosphate and 0.5 to 13 wt.% of monomorillonite having a composition (% by weight, calculated on an anhydrous basis) of 60.0 to 70.0% of SiO.sub.2, 20.0 to 30.0% of Al.sub.2 O.sub.3, 2.0 to 5.0% of MgO, 2.0 to 5.0% of Na.sub.2 O and 0.0 to 2.0% of Fe.sub.2 O.sub.3 or hectorite having a composition (% by weight, calculated on an anhydrous basis) of 50.0 to 65.0% of SiO.sub.2, 20.0 to 30.0% of MgO, 2.5 to 5.0% of Na.sub.2 O, 0.6 to 2.0% of Li.sub.2 O and 0.0 to 2.0% of Fe.sub.2 O.sub.3.
    Type: Grant
    Filed: October 20, 1976
    Date of Patent: March 28, 1978
    Assignee: Kao Soap Co., Ltd.
    Inventors: Toshiro Asakawa, Atsuo Ishida, Shizuo Hayashi
  • Patent number: 4064231
    Abstract: A dentifrice composition comprising a water-soluble fluoride of the type customarily added to dentifrices as a caries-preventing agent, in an amount of 100 to 2,000 ppm calculated as fluorine, and 0.3 to 13% by weight of montmorillonite having the following composition (% by weight, calculated on an anhydrous basis):SiO.sub.2 : 60.0 - 70.0MgO : 2.0 - 5.0Fe.sub.2 O.sub.3 : 0 - 2.0Al.sub.2 O.sub.3 : 20.0 - 30.0Na.sub.2 O : 2.0 - 5.0or hectorite having the following composition (% by weight, calculated on an anhydrous basis):SiO.sub.2 : 50.0 - 65.0Na.sub.2 O : 2.5 - 5.0Fe.sub.2 O.sub.3 : 0 - 2.0MgO : 20.0 - 30.0Li.sub.2 O : 0.6 - 2.
    Type: Grant
    Filed: August 18, 1976
    Date of Patent: December 20, 1977
    Assignee: Kao Soap Co., Ltd.
    Inventors: Toshiro Asakawa, Atsuo Ishida, Shizuo Hayashi