Patents by Inventor Richard D. Perez

Richard D. Perez 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).

  • Method of making a casting
    Patent number: 4307044
    Abstract: A pontic having a core constructed from a ceramic material embedded in a metal mass at least a portion of which is itself covered by a layer of porcelain. One or more pins are initially inserted into the core for facilitating placement of the core subsequent to waxing of same into a pattern in the cavity of a mold while the pattern is invested and the metal mass subsequently cast within the investment. The porcelain covering layer can be added to the casting in a conventional manner once the casting has been removed from the mold and cleaned in an appropriate manner.
    Type: Grant
    Filed: June 27, 1980
    Date of Patent: December 22, 1981
    Inventor: Richard D. Perez
  • Pontic having an internal ceramic core
    Patent number: 4229170
    Abstract: A pontic having a core constructed from a ceramic material embedded in a metal mass at least a portion of which is itself covered by a layer of porcelain. One or more pins are initially inserted into the core for facilitating placement of the core subsequent to waxing of same into a pattern in the cavity of a mold while the pattern is invested and the metal mass subsequently cast within the investment. The porcelain covering layer can be added to the casting in a conventional manner once the casting has been removed from the mold and cleaned in an appropriate manner.
    Type: Grant
    Filed: May 4, 1978
    Date of Patent: October 21, 1980
    Inventor: Richard D. Perez