Patents by Inventor Lawrence M. Haas

Lawrence M. Haas 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).

  • Joint prosthesis having PTFE cushion
    Patent number: 5879396
    Abstract: A joint prosthesis for interconnecting the ends of adjoining bones includes a cushion of expanded PTFE having at least two facets for attachment to the bones. The cushion may or may not include stems for insertion into the bones. An optional sheath surrounds the non-facet surfaces of the cushion for preventing adherence of tissue. The motion of the prosthesis is defined or limited by the orientation of the facets and/or by the porosity of the cushion and/or by an insert within the cushion.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: March 9, 1999
    Inventors: D. Kenneth Walston, Lawrence M. Haas
  • Joint prosthesis having PTFE cushion
    Patent number: 5507823
    Abstract: A joint prosthesis for interconnecting the ends of adjoining bones includes a cushion of expanded PTFE having at least two facets for attachment to the bones. The cushion may or may not include stems for insertion into the bones. An optional sheath surrounds the non-facet surfaces of the cushion for preventing adherence of tissue. The motion of the prosthesis is defined or limited by the orientation of the facets and/or by the porosity of the cushion and/or by an insert within the cushion.
    Type: Grant
    Filed: September 15, 1994
    Date of Patent: April 16, 1996
    Inventors: D. Kenneth Walston, Lawrence M. Haas
  • Method of making joint prosthesis having PTFE cushion
    Patent number: 5491882
    Abstract: A joint prosthesis for interconnecting the ends of adjoining bones includes a cushion of expanded PTFE having at least two facets for attachment to the bones. The cushion may or may not include stems for insertion into the bones. An optional sheath surrounds the non-facet surfaces of the cushion for preventing adherence of tissue. The motion of the prosthesis is defined or limited by the orientation of the facets and/or by the porosity of the cushion and/or by an insert within the cushion.
    Type: Grant
    Filed: September 13, 1994
    Date of Patent: February 20, 1996
    Inventors: D. Kenneth Walston, Lawrence M. Haas