Patents by Inventor Hengda D. Liu

Hengda D. Liu 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).

  • Publication number: 20220151787
    Abstract: A joint prosthesis system is suitable for cementless fixation. The system includes a metal implant component that has a mounting surface for supporting an insert. The metal implant component includes a solid metal portion and a porous metal portion. The porous metal portion has surfaces with different characteristics, such as roughness, to improve bone fixation, ease removal of the implant component in a revision surgery, reduce soft tissue irritation, improve the strength of a sintered bond between the solid and porous metal portions, or reduce or eliminate the possibility of blood traveling through the porous metal portion into the joint space. A method of making the joint prosthesis is also disclosed. The invention may also be applied to discrete porous metal implant components, such as augment.
    Type: Application
    Filed: November 23, 2021
    Publication date: May 19, 2022
    Inventors: STEPHANIE M. WAINSCOTT, DAREN L. DEFFENBAUGH, HENGDA D. LIU, ANDREW J. MARTIN, JEFFREY A. RYBOLT, BRYAN J. SMITH, ANTHONY D. ZANNIS
  • Patent number: 11213397
    Abstract: A joint prosthesis system is suitable for cementless fixation. The system includes a metal implant component that has a mounting surface for supporting an insert. The metal implant component includes a solid metal portion and a porous metal portion. The porous metal portion has surfaces with different characteristics, such as roughness, to improve bone fixation, ease removal of the implant component in a revision surgery, reduce soft tissue irritation, improve the strength of a sintered bond between the solid and porous metal portions, or reduce or eliminate the possibility of blood traveling through the porous metal portion into the joint space. A method of making the joint prosthesis is also disclosed. The invention may also be applied to discrete porous metal implant components, such as augment.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: January 4, 2022
    Assignee: DEPUY IRELAND UNLIMITED COMPANY
    Inventors: Stephanie M. Wainscott, Daren L. Deffenbaugh, Hengda D. Liu, Andrew J. Martin, Jeffrey A. Rybolt, Bryan J. Smith, Anthony D. Zannis
  • Publication number: 20190358041
    Abstract: A joint prosthesis system is suitable for cementless fixation. The system includes a metal implant component that has a mounting surface for supporting an insert. The metal implant component includes a solid metal portion and a porous metal portion. The porous metal portion has surfaces with different characteristics, such as roughness, to improve bone fixation, ease removal of the implant component in a revision surgery, reduce soft tissue irritation, improve the strength of a sintered bond between the solid and porous metal portions, or reduce or eliminate the possibility of blood traveling through the porous metal portion into the joint space. A method of making the joint prosthesis is also disclosed. The invention may also be applied to discrete porous metal implant components, such as augment.
    Type: Application
    Filed: August 7, 2019
    Publication date: November 28, 2019
    Inventors: STEPHANIE M. WAINSCOTT, DAREN L. DEFFENBAUGH, HENGDA D. LIU, ANDREW J. MARTIN, JEFFREY A. RYBOLT, BRYAN J. SMITH, ANTHONY D. ZANNIS
  • Patent number: 10433964
    Abstract: A joint prosthesis system is suitable for cementless fixation. The system has two metal implant components and a bearing. One of the metal implant components has an articulation surface for articulation with the bearing. The other metal implant component has a mounting surface for supporting the bearing. One of the metal implant components includes a solid metal portion and a porous metal portion. The porous metal portion has surfaces with different characteristics, such as roughness, to improve bone fixation, ease removal of the implant component in a revision surgery, reduce soft tissue irritation, improve the strength of a sintered bond between the solid and porous metal portions, or reduce or eliminate the possibility of blood traveling through the porous metal portion into the joint space. A method of making the joint prosthesis is also disclosed. The invention may also be applied to discrete porous metal implant components, such as augment.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: October 8, 2019
    Assignee: DEPUY IRELAND UNLIMITED COMPANY
    Inventors: Stephanie M Wainscott, Daren L Deffenbaugh, Hengda D Liu, Andrew J Martin, Jeffrey A Rybolt, Bryan J Smith, Anthony D Zannis
  • Publication number: 20170239052
    Abstract: A joint prosthesis system is suitable for cementless fixation. The system has two metal implant components and a bearing. One of the metal implant components has an articulation surface for articulation with the bearing. The other metal implant component has a mounting surface for supporting the bearing. One of the metal implant components includes a solid metal portion and a porous metal portion. The porous metal portion has surfaces with different characteristics, such as roughness, to improve bone fixation, ease removal of the implant component in a revision surgery, reduce soft tissue irritation, improve the strength of a sintered bond between the solid and porous metal portions, or reduce or eliminate the possibility of blood traveling through the porous metal portion into the joint space. A method of making the joint prosthesis is also disclosed. The invention may also be applied to discrete porous metal implant components, such as augment.
    Type: Application
    Filed: May 8, 2017
    Publication date: August 24, 2017
    Inventors: STEPHANIE M. WAINSCOTT, DAREN L. DEFFENBAUGH, HENGDA D. LIU, ANDREW J. MARTIN, JEFFREY A. RYBOLT, BRYAN J. SMITH, ANTHONY D. ZANNIS
  • Patent number: 9393118
    Abstract: Provided are methods for processing a green body that includes compacted metal powder, comprising impacting the green body with a particulate material for a time and under conditions effective to displace a portion of the metal powder from the green body. The present methods can be used to prepare green bodies that have “roughened” surfaces and that can be used to make orthopedic implants displaying low movement relative to bone when installed in situ, which corresponds to higher stability upon implantation and decreases the time required for biological fixation of the implant. Also provided are implants comprising a metallic matrix, and methods comprising surgically installing an implant prepared from a “surface roughened” green body in accordance with the present invention.
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: July 19, 2016
    Assignee: DEPUY SYNTHES PRODUCTS, INC.
    Inventors: Bryan J. Smith, Jeffrey A. Rybolt, Hengda D. Liu, Andrew J. Martin
  • Publication number: 20150313715
    Abstract: A joint prosthesis system is suitable for cementless fixation. The system has two metal implant components and a bearing. One of the metal implant components has an articulation surface for articulation with the bearing. The other metal implant component has a mounting surface for supporting the bearing. One of the metal implant components includes a solid metal portion and a porous metal portion. The porous metal portion has surfaces with different characteristics, such as roughness, to improve bone fixation, ease removal of the implant component in a revision surgery, reduce soft tissue irritation, improve the strength of a sintered bond between the solid and porous metal portions, or reduce or eliminate the possibility of blood traveling through the porous metal portion into the joint space. A method of making the joint prosthesis is also disclosed. The invention may also be applied to discrete porous metal implant components, such as augments.
    Type: Application
    Filed: July 9, 2015
    Publication date: November 5, 2015
    Inventors: STEPHANIE M. WAINSCOTT, DAREN L. DEFFENBAUGH, HENGDA D. LIU, ANDREW J. MARTIN, JEFFREY A. RYBOLT, BRYAN J. SMITH, ANTHONY D. ZANNIS
  • Patent number: 9101476
    Abstract: A joint prosthesis system is suitable for cementless fixation. The system has two metal implant components and a bearing. One of the metal implant components has an articulation surface for articulation with the bearing. The other metal implant component has a mounting surface for supporting the bearing. One of the metal implant components includes a solid metal portion and a porous metal portion. The porous metal portion has surfaces with different characteristics, such as roughness, to improve bone fixation, ease removal of the implant component in a revision surgery, reduce soft tissue irritation, improve the strength of a sintered bond between the solid and porous metal portions, or reduce or eliminate the possibility of blood traveling through the porous metal portion into the joint space. A method of making the joint prosthesis is also disclosed. The invention may also be applied to discrete porous metal implant components, such as augment.
    Type: Grant
    Filed: October 14, 2010
    Date of Patent: August 11, 2015
    Assignee: DEPUY (IRELAND)
    Inventors: Stephanie M. Deruntz, Daren L. Deffenbaugh, Hengda D. Liu, Andrew J. Martin, Jeffrey A. Rybolt, Bryan J. Smith, Anthony D. Zannis
  • Publication number: 20150157460
    Abstract: Provided are methods for processing a green body that includes compacted metal powder, comprising impacting the green body with a particulate material for a time and under conditions effective to displace a portion of the metal powder from the green body. The present methods can be used to prepare green bodies that have “roughened” surfaces and that can be used to make orthopedic implants displaying low movement relative to bone when installed in situ, which corresponds to higher stability upon implantation and decreases the time required for biological fixation of the implant. Also provided are implants comprising a metallic matrix, and methods comprising surgically installing an implant prepared from a “surface roughened” green body in accordance with the present invention.
    Type: Application
    Filed: September 17, 2014
    Publication date: June 11, 2015
    Inventors: Bryan J. Smith, Jeffrey A. Rybolt, Hengda D. Liu, Andrew J. Martin
  • Patent number: 8506643
    Abstract: An acetabular prosthesis system configured to be coupled to a surgically-prepared acetabulum includes an acetabular shell, an augment component, and a fastener configured to couple the acetabular shell and the augment component together.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: August 13, 2013
    Assignee: DePuy Synthes Products, LLC
    Inventors: Ryan C. Keefer, Jeffrey A. Rybolt, Hengda D. Liu, Matthew D. Smith, Gerhard J. A. Drescher
  • Publication number: 20110264232
    Abstract: An acetabular prosthesis system configured to be coupled to a surgically-prepared acetabulum includes an acetabular shell, an augment component, and a fastener configured to couple the acetabular shell and the augment component together.
    Type: Application
    Filed: July 8, 2011
    Publication date: October 27, 2011
    Inventors: Ryan C. Keefer, Jeffrey A. Rybolt, Hengda D. Liu, Matthew D. Smith, Gerhard J. A. Drescher
  • Patent number: 7985260
    Abstract: An acetabular prosthesis system configured to be coupled to a surgically-prepared acetabulum includes an acetabular shell, an augment component, and a fastener configured to couple the acetabular shell and the augment component together.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: July 26, 2011
    Assignee: DePuy Products, Inc.
    Inventors: Ryan C. Keefer, Jeffrey A. Rybolt, Hengda D. Liu, Matthew D. Smith, Gerhard J. A. Drescher
  • Publication number: 20110029092
    Abstract: A joint prosthesis system is suitable for cemented fixation. The system has two metal implant components and a bearing. One of the metal implant components has an articulation surface for articulation with the bearing. The other metal implant component has a mounting surface for supporting the bearing. One of the metal implant components includes a solid metal portion and a porous metal portion. The porous metal portion has surfaces with different characteristics, such as roughness, to improve bone fixation, ease removal of the implant component in a revision surgery, reduce soft tissue irritation, improve the strength of a sintered bond between the solid and porous metal portions, or reduce or eliminate the possibility of blood traveling through the porous metal portion into the joint space. A method of making the joint prosthesis is also disclosed. The invention may also be applied to discrete porous metal implant components, such as augment.
    Type: Application
    Filed: October 14, 2010
    Publication date: February 3, 2011
    Applicant: DEPUY PRODUCTS, INC.
    Inventors: STEPHANIE M. DERUNTZ, DAREN L. DEFFENBAUGH, HENGDA D. LIU, ANDREW J. MARTIN, JEFFREY A. RYBOLT, BRYAN J. SMITH, ANTHONY D. ZANNIS
  • Publication number: 20100098574
    Abstract: Provided are methods comprising at least one metal powder with an extractable material and a composition comprising a polyol, a hydrophilic polymer, or both in order to form a mixture in which the metal powder and the extractable material assume respective positions. The composition functions as a homogenizing agent that allows the mixture to remain well-mixed for extended periods of time under ambient conditions. Also provided are green bodies and porous constructs, including implants, that are made in accordance with the disclosed methods. The green bodies and porous constructs have a substantially uniform porosity that is at least partially attributable to the ability of the composition to maintain the metal powder and the extractable material in their respective positions prior to sintering.
    Type: Application
    Filed: August 13, 2009
    Publication date: April 22, 2010
    Inventors: Hengda D. Liu, Bryan Smith, Richard King
  • Publication number: 20090326670
    Abstract: An acetabular prosthesis system configured to be coupled to a surgically-prepared acetabulum includes an acetabular shell, an augment component, and a fastener configured to couple the acetabular shell and the augment component together.
    Type: Application
    Filed: June 30, 2008
    Publication date: December 31, 2009
    Inventors: Ryan C. Keefer, Jeffrey A. Rybolt, Hengda D. Liu, Matthew D. Smith, Gerhard J. A. Drescher