Patents by Inventor Dale A. DeGroff

Dale A. DeGroff 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).

  • Fully porous prosthetic hip stem
    Patent number: 10070961
    Abstract: A prosthetic hip stem for use in a prosthetic hip joint. The hip stem generally includes a core having a stem portion and a neck portion, a polymer matrix layer substantially covering the stem portion of the core, and a porous metal layer substantially covering the polymer matrix layer. The polymer matrix layer connects the core and the porous metal layer, and may be injection molded therebetween. The neck portion of the hip stem has a relatively thin or slender profile which allows for an increased degree of articulating movement of the hip stem with respect to the acetabular component of a prosthetic hip joint. The neck portion of the hip stem additionally includes a version indicator element, such as a bump or a protrusion, which may be tactilely felt by a surgeon to aid the surgeon in positioning the hip stem during a minimally invasive total hip arthroplasty procedure, for example, where direct visualization of the hip stem by the surgeon may not be possible.
    Type: Grant
    Filed: February 14, 2006
    Date of Patent: September 11, 2018
    Assignee: Zimmer, Inc.
    Inventors: Stephen H. Hoag, Dale A. Degroff, Douglas H. Wentz, Leslie N. Gilbertson, Roy D. Crowninshield
  • Fully porous prosthetic hip stem
    Publication number: 20060276906
    Abstract: A prosthetic hip stem for use in a prosthetic hip joint. The hip stem generally includes a core having a stem portion and a neck portion, a polymer matrix layer substantially covering the stem portion of the core, and a porous metal layer substantially covering the polymer matrix layer. The polymer matrix layer connects the core and the porous metal layer, and may be injection molded therebetween. The neck portion of the hip stem has a relatively thin or slender profile which allows for an increased degree of articulating movement of the hip stem with respect to the acetabular component of a prosthetic hip joint. The neck portion of the hip stem additionally includes a version indicator element, such as a bump or a protrusion, which may be tactilely felt by a surgeon to aid the surgeon in positioning the hip stem during a minimally invasive total hip arthroplasty procedure, for example, where direct visualization of the hip stem by the surgeon may not be possible.
    Type: Application
    Filed: February 14, 2006
    Publication date: December 7, 2006
    Inventors: Stephen Hoag, Dale Degroff, Douglas Wentz, Leslie Gilbertson, Roy Crowninshield
  • Femoral component for a hip prosthesis
    Patent number: 4813963
    Abstract: A femoral component for a hip prosthesis includes a proximal end shaped in an anatomic manner to form asymmetrical sides. In particular, a lateral side forms an acute angle with an anterior side and a medial side forms an arcuate surface.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: March 21, 1989
    Assignee: Zimmer, Inc.
    Inventors: Roy Y. Hori, Mark A. Lazzeri, Clayton R. Miller, Dale A. DeGroff, Ted L. Dock
  • Proximal portion of a femoral hip stem prothesis
    Patent number: D339634
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: September 21, 1993
    Assignee: Zimmer, Inc.
    Inventors: Roy Y. Hori, David C. Bernens, Dale A. DeGroff, Ted L. Dock, Mark A. Lazzeri, Clayton R. Miller