Patents Assigned to Yasuhiro Asai
  • Dental cleaner materials
    Patent number: 5120460
    Abstract: A dental cleaner material comprises as a main component an aqueous solution containing 0.1 to 2.0% by weight of ethylenediaminetetraacetic acid or at least one of its alkali metal salts. The cleaner material is gelled by the addition of a carboxyvinyl polymer, carboxymethylcellulose or sodium carboxymethylcellulose as a raiser in viscosity showing thixotropy, further contains 0.01 to 0.3% by weight fo a p-hydroxybenzoic acid ester as an antibacterial agent, and is regulated to pH of 7.0.+-.0.5.
    Type: Grant
    Filed: March 29, 1990
    Date of Patent: June 9, 1992
    Assignees: G-C Dental Industrial Corp., Yasuhiro Asai
    Inventors: Yasuhiro Asai, Kiyoko Nakamura, Masayuki Takahashi