Patents by Inventor Phillip J. Andersen

Phillip J. Andersen 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 constructing prosthetic implant with wrapped porous surface
    Patent number: 5018285
    Abstract: A method of constructing a prosthetic implant including a porous pad separate from the stem of the implant and in which the pad is wrapped around the stem for attachment thereto. The pad is first precontoured into a preliminary shape and is then wrapped about the stem in a second and final shape corresponding to the shape of the stem portion about which it is wrapped and subsequently secured.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: May 28, 1991
    Assignee: Zimmer, Inc.
    Inventors: Arden R. Zolman, Phillip J. Andersen, Steven T. Bayne
  • Prosthetic implant with wrapped porous surface
    Patent number: 5013324
    Abstract: A prosthetic implant including a porous pad separate from the stem of the implant and in which the pad is adapted to be wrapped around the stem for attachment thereto. The pad is first precontoured into a preliminary shape and is then wrapped about the stem in a second and final shape corresponding to the shape of the stem portion about which it is wrapped and subsequently secured.
    Type: Grant
    Filed: November 28, 1988
    Date of Patent: May 7, 1991
    Assignee: Zimmer, Inc.
    Inventors: Arden R. Zolman, Phillip J. Andersen, Steven T. Bayne
  • Implant and method for production thereof
    Patent number: 4863475
    Abstract: An implantable prosthesis including a base member, such as the stem of a hip joint prosthesis, having a porous region on its surface, and the region of porosity being coated with a bioabsorbable material, such as .alpha.-tricalcium phosphate, which enhances permanent bone ingrowth into the region. A method of manufacture of the prosthesis includes the steps of providing a coating material and applying the material to at least a portion of the porous surface of the base member, while providing energy sufficient to transform the material to a state in which it is bioabsorbable. In the preferred embodiment the material is plasma sprayed onto the porous surface of the base member.
    Type: Grant
    Filed: August 31, 1984
    Date of Patent: September 5, 1989
    Assignee: Zimmer, Inc.
    Inventors: Phillip J. Andersen, Jack E. Parr
  • Sintered powdered titanium alloy and method of producing same
    Patent number: 4432795
    Abstract: A sintered powdered titanium alloy article is provided which has a density approaching theoretical and which is characterized by having physical properties similar to those of a wrought titanium alloy article having the same chemical composition.
    Type: Grant
    Filed: February 16, 1982
    Date of Patent: February 21, 1984
    Assignee: Imperial Clevite Inc.
    Inventor: Phillip J. Andersen
  • Machine parts of powdered metal
    Patent number: 4216270
    Abstract: A non-galling machine part, especially one to be mated to an opposed part of stainless steel, and consisting essentially of sintered stainless steel having interconnected porosity impregnated with bismuth or a bismuth-rich alloy such as bismuth-tin eutectic.
    Type: Grant
    Filed: December 13, 1978
    Date of Patent: August 5, 1980
    Assignee: Abex Corporation
    Inventors: Gregory D. Lawless, Joel S. Hirschhorn, Phillip J. Andersen