Patents by Inventor Yoshiyuki Muroi

Yoshiyuki Muroi 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).

  • Oral preparation and chewing gum
    Patent number: 8206689
    Abstract: The invention provides an oral preparation or a chewing gum comprising an organic acid and/or inorganic acid and a fluoride ion supplying compound, wherein a light scattering layer is formed inside enamel of the teeth when the oral preparation or the chewing gum is applied to teeth. An internal tooth colored layer in the enamel is masked by the light scattering layer, and a white appearance is imparted to the teeth.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: June 26, 2012
    Assignee: Kao Corporation
    Inventors: Kazuhiko Kato, Yoshinori Murakami, Yoshiyuki Muroi, Manabu Tonomura, Mitsuyoshi Kashiwagi
  • Oral preparation and chewing gum
    Publication number: 20060099153
    Abstract: The invention provides an oral preparation or a chewing gum comprising an organic acid and/or inorganic acid and a fluoride ion supplying compound, wherein a light scattering layer is formed inside enamel of the teeth when the oral preparation or the chewing gum is applied to teeth. An internal tooth colored layer in the enamel is masked by the light scattering layer, and a white appearance is imparted to the teeth.
    Type: Application
    Filed: October 31, 2003
    Publication date: May 11, 2006
    Applicant: Kao Corporation
    Inventors: Kazuhiko Kato, Yoshinori Murakami, Yoshiyuki Muroi, Manabu Tonomura, Mitsuyoshi Kashiwagi
  • Keratotic plug remover
    Patent number: 6607719
    Abstract: A keratotic plug remover composition comprising a polymer compound having a salt forming group is disclosed. The composition according to the invention can effectively remove keratotic plugs in the skin pores, so that the conspicuousness of the skin pores is mitigated and clean and healthy skin pores can be maintained. The composition does not hurt the skin.
    Type: Grant
    Filed: April 30, 2001
    Date of Patent: August 19, 2003
    Assignee: Kao Corporation
    Inventors: Tomohiro Uemura, Masanori Tanahashi, Yoshiyuki Muroi, Yoshinao Kono
  • Keratotic plug remover
    Publication number: 20020048560
    Abstract: A keratotic plug remover composition comprising a polymer compound having a salt forming group is disclosed. The composition according to the invention can effectively remove keratotic plugs in the skin pores, so that the conspicuousness of the skin pores is mitigated and clean and healthy skin pores can be maintained. The composition does not hurt the skin.
    Type: Application
    Filed: April 30, 2001
    Publication date: April 25, 2002
    Applicant: KAO CORPORATION
    Inventors: Tomohiro Uemura, Masanori Tanahashi, Yoshiyuki Muroi, Yoshinao Kono
  • Dentifrice composition
    Patent number: 5700449
    Abstract: The dentifrice composition includes capsule particles containing agar as a main component of a coat-forming substance and having an average particle size of from 0.3 to 3 mm, and vehicles for use in oral cavity. It may further contain nonionic surfactants and/or water-insoluble abrasive granules as desired.
    Type: Grant
    Filed: October 17, 1995
    Date of Patent: December 23, 1997
    Assignee: Kao Corporation
    Inventors: Yasushi Katayama, Kouji Maeda, Ryozo Nakai, Yoshiyuki Muroi, Takao Okajima
  • Keratotic plug remover
    Patent number: 5512277
    Abstract: A keratotic plug remover composition comprising a polymer compound having a salt forming group is disclosed. The composition according to the invention can effectively remove keratotic plugs in the skin pores, so that the conspicuousness of the skin pores is mitigated and clean and healthy skin pores can be maintained. The composition does not hurt the skin.
    Type: Grant
    Filed: March 21, 1994
    Date of Patent: April 30, 1996
    Assignee: Kao Corporation
    Inventors: Tomohiro Uemura, Masanori Tanahashi, Yoshiyuki Muroi, Yoshinao Kono
  • Process for preparing particles of olefin-maleic anhydride copolyer
    Patent number: 4795792
    Abstract: A copolymer of an olefin and maleic anhydride is produced in the form of particles by co-polymerizing an olefin having 2 to 8 carbon atoms with maleic anhydride in a solvent capable of dissolving both co-monomers, but incapable of dissolving the copolymer in the presence of a dispersant of an oil-soluble, cationic copolymer comprising (a) ethylenically unsaturated monomer units having cationic groups of a quaternary ammonium salt and (b) lipophilic, ethylenically unsaturated monomer units.
    Type: Grant
    Filed: April 28, 1988
    Date of Patent: January 3, 1989
    Assignee: Kao Corporation
    Inventors: Shoji Ohtani, Yoshiyuki Muroi, Rikio Tsushima