Patents by Inventor Steven A. Zawadzki

Steven A. Zawadzki 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: 10426623
    Abstract: A hip stem prosthesis is provided for treating a deficient hip joint.
    Type: Grant
    Filed: April 7, 2017
    Date of Patent: October 1, 2019
    Assignee: Zimmer, Inc.
    Inventors: Natalia Fridshtand, Douglas W. Gabel, Steven Charlebois, David L. Glass, Steven Zawadzki, Jeffrey P. Matney
  • Publication number: 20170209276
    Abstract: A hip stem prosthesis is provided for treating a deficient hip joint.
    Type: Application
    Filed: April 7, 2017
    Publication date: July 27, 2017
    Inventors: Natalia Fridshtand, Douglas W. Gabel, Steven Charlebois, David L. Glass, Steven Zawadzki, Jeffrey P. Matney
  • Patent number: 9656358
    Abstract: A method for attaching a porous metal layer to a dense metal substrate, wherein the method is particularly useful in forming orthopedic implants such as femoral knee components, femoral hip components, and/or acetabular cups. The method, in one embodiment thereof, comprises providing a solid metal substrate; providing a porous metal structure; contouring a surface of the porous metal structure; placing the porous structure against the substrate such that the contoured surface of the porous metal structure is disposed against the substrate, thereby forming an assembly; applying heat and pressure to the assembly in conjunction with thermal expansion of the substrate in order to metallurgically bond the porous structure and the substrate; and removing mass from the substrate after the porous structure is bonded to the substrate, thereby finish processing the assembly.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: May 23, 2017
    Assignee: Zimmer, Inc.
    Inventors: Steven Charlebois, Leslie N. Gilbertson, Michael E Hawkins, Dana Medlin, H. Ravindranath Shetty, Steven Zawadzki
  • Patent number: 9636227
    Abstract: A hip stem prosthesis is provided for treating a deficient hip joint.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: May 2, 2017
    Assignee: Zimmer, Inc.
    Inventors: Natalia Fridshtand, Douglas W. Gabel, Steven Charlebois, David L. Glass, Steven Zawadzki, Jeffrey P. Matney
  • Patent number: 9439779
    Abstract: A composite interbody vertebral implant for facilitating fusion of adjacent vertebrae. The implant includes a first endplate of a porous metal material and a second endplate of a porous metal material which are configured to allow bone in-growth. The implant also includes a polymeric body positioned between and bonded to the first and second endplates such that polymeric material of the polymeric body is impregnated into pores of the first and second endplates to bond the components together. The implant may include a cavity extending through the composite implant configured to receive bone growth material to facilitate fusion between a first vertebra and a second vertebra.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: September 13, 2016
    Assignee: Zimmer Spine, Inc.
    Inventors: Kai Zhang, Christopher J. Valois, Zhibin Fang, Jeffrey A. Bassett, Steven A. Zawadzki, David C. Kirt, Steven E. Spangle
  • Patent number: 8985430
    Abstract: A method for attaching a porous metal layer to a dense metal substrate, wherein the method is particularly useful in forming orthopedic implants such as femoral knee components, femoral hip components, and/or acetabular cups. The method, in one embodiment thereof, comprises providing a solid metal substrate; providing a porous metal structure; contouring a surface of the porous metal structure; placing the porous structure against the substrate such that the contoured surface of the porous metal structure is disposed against the substrate, thereby forming an assembly; applying heat and pressure to the assembly in conjunction with thermal expansion of the substrate in order to metallurgically bond the porous structure and the substrate; and removing mass from the substrate after the porous structure is bonded to the substrate, thereby finish processing the assembly.
    Type: Grant
    Filed: May 1, 2012
    Date of Patent: March 24, 2015
    Assignee: Zimmer, Inc.
    Inventors: Steven J. Charlebois, Leslie N. Gilbertson, Michael E. Hawkins, Dana J. Medlin, H. Ravindranath Shetty, Steven A. Zawadzki
  • Publication number: 20150025649
    Abstract: A hip stem prosthesis is provided for treating a deficient hip joint.
    Type: Application
    Filed: October 9, 2014
    Publication date: January 22, 2015
    Inventors: Natalia Fridshtand, Douglas W. Gabel, Steven Charlebois, David L. Glass, Steven Zawadzki, Jeffrey P. Matney
  • Publication number: 20150005885
    Abstract: A composite interbody vertebral implant for facilitating fusion of adjacent vertebrae. The implant includes a first endplate of a porous metal material and a second endplate of a porous metal material which are configured to allow bone in-growth. The implant also includes a polymeric body positioned between and bonded to the first and second endplates such that polymeric material of the polymeric body is impregnated into pores of the first and second endplates to bond the components together. The implant may include a cavity extending through the composite implant configured to receive bone growth material to facilitate fusion between a first vertebra and a second vertebra.
    Type: Application
    Filed: September 15, 2014
    Publication date: January 1, 2015
    Inventors: Kai Zhang, Christopher J. Valois, Zhibin Fang, Jeffrey A. Bassett, Steven A. Zawadzki, David C. Kirt, Steven E. Spangle
  • Patent number: 8858646
    Abstract: A hip prosthesis is provided for insertion into a femur. In one exemplary embodiment, the hip prosthesis includes a stem having a proximal end, a distal end, and a longitudinal axis. This stem may include anterior and posterior locking surfaces which diverge away from the longitudinal axis. A shank portion may extend distally from the anterior and posterior locking surfaces and converge at an angle distally toward the longitudinal axis.
    Type: Grant
    Filed: May 7, 2012
    Date of Patent: October 14, 2014
    Assignee: Zimmer, Inc.
    Inventors: Natalia Fridshtand, Douglas W. Gabel, Steven J. Charlebois, David L. Glass, Steven A. Zawadzki, Jeffrey P. Matney
  • Patent number: 8845736
    Abstract: A composite interbody vertebral implant for facilitating fusion of adjacent vertebrae. The implant includes a first endplate of a porous metal material and a second endplate of a porous metal material which are configured to allow bone in-growth. The implant also includes a polymeric body positioned between and bonded to the first and second endplates such that polymeric material of the polymeric body is impregnated into pores of the first and second endplates to bond the components together. The implant may include a cavity extending through the composite implant configured to receive bone growth material to facilitate fusion between a first vertebra and a second vertebra.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: September 30, 2014
    Assignee: Zimmer Spine, Inc.
    Inventors: Kai Zhang, Christopher J. Valois, Zhibin Fang, Jeffrey A. Bassett, Steven A. Zawadzki, David C. Kirt, Steven E. Spangle
  • Patent number: 8470042
    Abstract: A composite interbody vertebral implant for facilitating fusion of adjacent vertebrae. The implant includes a first endplate of a porous metal material and a second endplate of a porous metal material which are configured to allow bone in-growth. The implant also includes a polymeric body positioned between and bonded to the first and second endplates such that polymeric material of the polymeric body is impregnated into pores of the first and second endplates to bond the components together. The implant may include a cavity extending through the composite implant configured to receive bone growth material to facilitate fusion between a first vertebra and a second vertebra.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: June 25, 2013
    Assignee: Zimmer Spine, Inc.
    Inventors: Kai Zhang, Christopher J. Valois, Zhibin Fang, Jeffrey A. Bassett, Steven A. Zawadzki, David C. Kirt, Steven E. Spangle
  • Patent number: 8361150
    Abstract: A composite interbody vertebral implant for facilitating fusion of adjacent vertebrae. The implant includes a first endplate of a porous metal material and a second endplate of a porous metal material which are configured to allow bone in-growth. The implant also includes a polymeric body positioned between and bonded to the first and second endplates such that polymeric material of the polymeric body is impregnated into pores of the first and second endplates to bond the components together. The implant may include a cavity extending through the composite implant configured to receive bone growth material to facilitate fusion between a first vertebra and a second vertebra.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: January 29, 2013
    Assignee: Zimmer Spine, Inc.
    Inventors: Kai Zhang, Christopher J. Valois, Zhibin Fang, Jeffrey A. Bassett, Steven A. Zawadzki, David C. Kirt, Steven E. Spangle
  • Publication number: 20120234461
    Abstract: A method for attaching a porous metal layer to a dense metal substrate, wherein the method is particularly useful in forming orthopedic implants such as femoral knee components, femoral hip components, and/or acetabular cups. The method, in one embodiment thereof, comprises providing a solid metal substrate; providing a porous metal structure; contouring a surface of the porous metal structure; placing the porous structure against the substrate such that the contoured surface of the porous metal structure is disposed against the substrate, thereby forming an assembly; applying heat and pressure to the assembly in conjunction with thermal expansion of the substrate in order to metallurgically bond the porous structure and the substrate; and removing mass from the substrate after the porous structure is bonded to the substrate, thereby finish processing the assembly.
    Type: Application
    Filed: May 1, 2012
    Publication date: September 20, 2012
    Applicant: ZIMMER TECHNOLOGY, INC.
    Inventors: Steven J. Charlebois, Leslie N. Gilbertson, Michael E. Hawkins, Dana J. Medlin, H. Ravindranath Shetty, Steven A. Zawadzki
  • Publication number: 20120221116
    Abstract: A hip prosthesis is provided for insertion into a femur. In one exemplary embodiment, the hip prosthesis includes a stem having a proximal end, a distal end, and a longitudinal axis. This stem may include anterior and posterior locking surfaces which diverge away from the longitudinal axis. A shank portion may extend distally from the anterior and posterior locking surfaces and converge at an angle distally toward the longitudinal axis.
    Type: Application
    Filed: May 7, 2012
    Publication date: August 30, 2012
    Applicant: ZIMMER, INC.
    Inventors: Natalia Fridshtand, Douglas W. Gabel, Steven J. Charlebois, David L. Glass, Steven Zawadzki, Jeffrey P. Matney
  • Patent number: 8206455
    Abstract: A hip prosthesis is provided for insertion into a femur. In one exemplary embodiment, the hip prosthesis includes a stem having a proximal end, a distal end, and a longitudinal axis. This stem may include anterior and posterior locking surfaces which diverge away from the longitudinal axis. A shank portion may extend distally from the anterior and posterior locking surfaces and converge at an angle distally toward the longitudinal axis.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: June 26, 2012
    Assignee: Zimmer Technology, Inc.
    Inventors: Natalia Fridshtand, Douglas W. Gabel, Steven J. Charlebois, David L. Glass, Steven A. Zawadzki, Jeffrey P. Matney
  • Patent number: 8191760
    Abstract: A method for attaching a porous metal layer to a dense metal substrate, wherein the method is particularly useful in forming orthopedic implants such as femoral knee components, femoral hip components, and/or acetabular cups. The method, in one embodiment thereof, comprises providing a solid metal substrate; providing a porous metal structure; contouring a surface of the porous metal structure; placing the porous structure against the substrate such that the contoured surface of the porous metal structure is disposed against the substrate, thereby forming an assembly; applying heat and pressure to the assembly in conjunction with thermal expansion of the substrate in order to metallurgically bond the porous structure and the substrate; and removing mass from the substrate after the porous structure is bonded to the substrate, thereby finish processing the assembly.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: June 5, 2012
    Assignee: Zimmer Technology, Inc.
    Inventors: Steven J. Charlebois, Leslie N. Gilbertson, Michael E. Hawkins, Dana J. Medlin, H. Ravindranath Shetty, Steven A. Zawadzki
  • Publication number: 20110132974
    Abstract: A method for attaching a porous metal layer to a dense metal substrate, wherein the method is particularly useful in forming orthopedic implants such as femoral knee components, femoral hip components, and/or acetabular cups. The method, in one embodiment thereof, comprises providing a solid metal substrate; providing a porous metal structure; contouring a surface of the porous metal structure; placing the porous structure against the substrate such that the contoured surface of the porous metal structure is disposed against the substrate, thereby forming an assembly; applying heat and pressure to the assembly in conjunction with thermal expansion of the substrate in order to metallurgically bond the porous structure and the substrate; and removing mass from the substrate after the porous structure is bonded to the substrate, thereby finish processing the assembly.
    Type: Application
    Filed: February 15, 2011
    Publication date: June 9, 2011
    Applicant: ZIMMER, INC.
    Inventors: Steven J. Charlebois, Leslie N. Gilbertson, Michael E. Hawkins, Dana J. Medlin, H. Ravindranath Shetty, Steven A. Zawadzki
  • Patent number: 7918382
    Abstract: A method for attaching a porous metal layer to a dense metal substrate, wherein the method is particularly useful in forming orthopedic implants such as femoral knee components, femoral hip components, and/or acetabular cups. The method, in one embodiment thereof, comprises providing a solid metal substrate; providing a porous metal structure; contouring a surface of the porous metal structure; placing the porous structure against the substrate such that the contoured surface of the porous metal structure is disposed against the substrate, thereby forming an assembly; applying heat and pressure to the assembly in conjunction with thermal expansion of the substrate in order to metallurgically bond the porous structure and the substrate; and removing mass from the substrate after the porous structure is bonded to the substrate, thereby finish processing the assembly.
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: April 5, 2011
    Assignee: Zimmer Technology, Inc.
    Inventors: Steven J. Charlebois, Leslie N. Gilbertson, Michael E. Hawkins, Dana J. Medlin, H. Ravindranath Shetty, Steven A. Zawadzki
  • Publication number: 20110071635
    Abstract: A composite interbody vertebral implant for facilitating fusion of adjacent vertebrae. The implant includes a first endplate of a porous metal material and a second endplate of a porous metal material which are configured to allow bone ingrowth. The implant also includes a polymeric body positioned between and bonded to the first and second endplates such that polymeric material of the polymeric body is impregnated into pores of the first and second endplates to bond the components together. The implant may include a cavity extending through the composite implant configured to receive bone growth material to facilitate fusion between a first vertebra and a second vertebra.
    Type: Application
    Filed: July 2, 2010
    Publication date: March 24, 2011
    Applicant: Zimmer Spine, Inc.
    Inventors: Kai Zhang, Christopher J. Valois, Zhibin Fang, Jeffrey A. Bassett, Steven A. Zawadzki, David C. Kirt, Steven E. Spangle
  • Publication number: 20110009977
    Abstract: A hip prosthesis is provided for insertion into a femur. In one exemplary embodiment, the hip prosthesis includes a stem having a proximal end, a distal end, and a longitudinal axis. This stem may include anterior and posterior locking surfaces which diverge away from the longitudinal axis. A shank portion may extend distally from the anterior and posterior locking surfaces and converge at an angle distally toward the longitudinal axis.
    Type: Application
    Filed: September 13, 2010
    Publication date: January 13, 2011
    Applicant: ZIMMER, INC.
    Inventors: Natalia Fridshtand, Douglas W. Gabel, Steven J. Charlebois, David L. Glass, Steven Zawadzki, Jeffrey P. Matney