Patents by Inventor Dennis C. Smith

Dennis C. Smith 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).

  • Bonding to calcified tissues
    Patent number: 4548583
    Abstract: Bonding to calcified tissues, including human teeth, tooth dentine and bone, is achieved through the medium of crystal growth adhered to the tissue. The crystals preferably comprise gypsum crystals which are formed by contacting the tissue surface with a mildly acidic solution containing sulphate ions. An uncured liquid resin is applied to the crystal growth and is cured to achieve adhesion by micromechanical interlock with the crystal growth and by superficial penetration of the tissue surface.
    Type: Grant
    Filed: October 27, 1983
    Date of Patent: October 22, 1985
    Assignees: Dennis Smith Consulting Ltd., Romada Holdings Ltd.
    Inventors: Dennis C. Smith, Rolf Maijer
  • Orthodontic attachments
    Patent number: 4460336
    Abstract: Orthodontic brackets or other dental attachments are provided with particulate material on the tooth engaging surface thereof to improve the bonding of bracket to a tooth surface.The particulate material consists of metal spheres joined to each other and to the tooth engaging surface at their points of contact therewith.
    Type: Grant
    Filed: July 27, 1982
    Date of Patent: July 17, 1984
    Inventors: Dennis C. Smith, Rolf Maijer
  • Bonding to calcified tissues
    Patent number: 4382792
    Abstract: Bonding to calcified tissues, including human teeth, tooth dentine and bone, is achieved through the medium of crystal growth adhered to the tissue. The crystals preferably comprise gypsum crystals which are formed by contacting the tissue surface with a mildly acidic solution containing sulphate ions.
    Type: Grant
    Filed: February 17, 1981
    Date of Patent: May 10, 1983
    Assignees: Dennis Smith Consulting Limited, Romada Holdings Ltd.
    Inventors: Dennis C. Smith, Rolf Maijer