Patents by Inventor Ralph A. Roberts

Ralph A. Roberts 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: 5123842
    Abstract: An elongated flat body member has an implant end arranged to be embedded in the jaw bone and a post end arranged to project out of the jaw bone for support of a tooth crown. The post end of the body member has a lateral projection which serves as an abutment locator for a permanent crown mounted on the post end. The post end of the body member has a highly polished smooth surface area which forms a re-contouring portion for gum tissue as it heals around the body member. The implant end has a tapered shoulder and the polished area has tapered portions leading into these tapered shoulder portions of the implant end.
    Type: Grant
    Filed: February 1, 1991
    Date of Patent: June 23, 1992
    Inventor: Ralph A. Roberts
  • Patent number: 4377382
    Abstract: A rigid bar arranged to removably support an artificial denture is curved substantially to the longitudinal contour of the lower jaw bone. This bar has a front support arranged to be implanted in a front recess in the jaw bone and also includes a rear ramus implant portion on each side arranged to be implanted in the ramus portions of the jaw bone. Each of the ramus implant portions comprises a plate-like extension of the rigid bar having laterally facing surfaces. This rearward plate-like extension has an elongated length so as to project above or below the plane of the bar or in a preferred construction, such extension projects both above and below such bar to provide an extended implant attachment to the jaw bone structure. The plate-like extension angles forwardly from top to bottom so that it can be embedded efficiently in the rearward portion of the jaw bone.
    Type: Grant
    Filed: December 24, 1980
    Date of Patent: March 22, 1983
    Inventor: Ralph A. Roberts