Patents by Inventor Keenan Michael Hanson
Keenan Michael Hanson 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).
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Patent number: 11642222Abstract: A medical implant includes a body and a porous structure attached to the body. A boss integral with the body extends outwardly from a surface of the body. The porous structure has a surface that cooperates with the boss of the body to prevent pullout of the body from the porous structure. In fabricating the medical implant, the body and the porous structure are formed separately and subsequently secured together.Type: GrantFiled: March 31, 2020Date of Patent: May 9, 2023Assignee: Howmedica Osteonics Corp.Inventor: Keenan Michael Hanson
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Patent number: 11478357Abstract: A system for converting a first joint prosthesis to a second joint prosthesis in-situ includes a plurality of inserts having a bone interface side and a component facing side and a plurality of articulating components having a cavity configured to receive at least one of the plurality of inserts. The plurality of inserts may be unicompartmental, bicompartmental, or tricompartmental. The inserts may be made of metal and may have a bone contacting surface made of a porous metal. The plurality of articulating components may be unicompartmental, bicompartmental, or tricompartmental. The articulating components may be sized and shaped to cover one or more of the plurality of bone interface components and span a distance therebetween. The articulating components may be made of a polymer.Type: GrantFiled: June 10, 2020Date of Patent: October 25, 2022Assignee: Howmedica Osteonics Corp.Inventors: Mark Gruczynski, Keenan Michael Hanson
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Publication number: 20210059826Abstract: A system for converting a first joint prosthesis to a second joint prosthesis in-situ includes a plurality of inserts having a bone interface side and a component facing side and a plurality of articulating components having a cavity configured to receive at least one of the plurality of inserts. The plurality of inserts may be unicompartmental, bicompartmental, or tricompartmental. The inserts may be made of metal and may have a bone contacting surface made of a porous metal. The plurality of articulating components may be unicompartmental, bicompartmental, or tricompartmental. The articulating components may be sized and shaped to cover one or more of the plurality of bone interface components and span a distance therebetween. The articulating components may be made of a polymer.Type: ApplicationFiled: June 10, 2020Publication date: March 4, 2021Inventors: Mark Gruczynski, Keenan Michael Hanson
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Publication number: 20200222192Abstract: A medical implant includes a body and a porous structure attached to the body. A boss integral with the body extends outwardly from a surface of the body. The porous structure has a surface that cooperates with the boss of the body to prevent pullout of the body from the porous structure. In fabricating the medical implant, the body and the porous structure are formed separately and subsequently secured together.Type: ApplicationFiled: March 31, 2020Publication date: July 16, 2020Inventor: Keenan Michael Hanson
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Patent number: 10639160Abstract: A medical implant includes a body and a porous structure attached to the body. A boss integral with the body extends outwardly from a surface of the body. The porous structure has a surface that cooperates with the boss of the body to prevent pullout of the body from the porous structure. In fabricating the medical implant, the body and the porous structure are formed separately and subsequently secured together.Type: GrantFiled: August 22, 2017Date of Patent: May 5, 2020Assignee: Howmedica Osteonics Corp.Inventor: Keenan Michael Hanson
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Patent number: 9951190Abstract: A method for producing a wear resistant polyethylene medical implant includes forming a medical implant, such as an orthopedic implant, made at least partially of ultra high molecular weight polyethylene (UHMWPE). The polyethylene may be irradiated with gamma ray or e-beam radiation to form free radicals and then crosslinked to eliminate free radicals prior to exposure to oxygen. The so treated bearing surface of the crosslinked polyethylene is then coated with a photoinitiator. Thereafter the bearing material is photocrosslinked with ultra-violet (UV) radiation. The photocrosslinking process can also be applied to non-crosslink UHMWPE.Type: GrantFiled: July 22, 2015Date of Patent: April 24, 2018Assignee: Howmedica Osteonics Corp.Inventors: Shulin He, Zongtao Zhang, Keenan Michael Hanson, Shi-Shen Yau
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Publication number: 20180055642Abstract: A medical implant includes a body and a porous structure attached to the body. A boss integral with the body extends outwardly from a surface of the body. The porous structure has a surface that cooperates with the boss of the body to prevent pullout of the body from the porous structure. In fabricating the medical implant, the body and the porous structure are formed separately and subsequently secured together.Type: ApplicationFiled: August 22, 2017Publication date: March 1, 2018Inventor: Keenan Michael Hanson
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Patent number: 9828474Abstract: A method for producing a wear resistant polyethylene medical implant includes forming a medical implant, such as an orthopedic implant, made at least partially of ultra high molecular weight polyethylene (UHMWPE). The polyethylene may be irradiated with gamma ray or e-beam radiation to form free radicals and then crosslinked to eliminate free radicals prior to exposure to oxygen. The so treated bearing surface of the crosslinked polyethylene is then coated with a photoinitiator. Thereafter the bearing material is photocrosslinked with ultra-violet (UV) radiation. The photocrosslinking process can also be applied to non-crosslink UHMWPE.Type: GrantFiled: September 11, 2015Date of Patent: November 28, 2017Assignee: Howmedica Osteonics Corp.Inventors: Shulin He, Zongtao Zhang, Keenan Michael Hanson, Shi-Shen Yau
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Patent number: 9763791Abstract: A prosthetic head for a femoral component has a metal shell with a tapered cavity. The shell has a part-spherical outer surface defining an inner portion terminating in an open end. A polymeric material completely fills the inner portion of the hollow shell extending from an inner surface of the shell to the open end. The polymeric material includes a conically tapered socket centered about the polar axis intermediate ends of the open end wherein the shell is a hollow titanium shell having an inner surface with a porous structure for receiving a portion of the polymeric material. The hollow titanium shell inner surface has at least one rib extending inwardly toward the conically tapered socket.Type: GrantFiled: February 6, 2013Date of Patent: September 19, 2017Assignee: Howmedica Osteonics Corp.Inventors: Daniel E. Lawrynowicz, Haitong Zeng, Zongtao Zhang, Aiguo Wang, Keenan Michael Hanson
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Patent number: 9370605Abstract: A method for coating an orthopedic implant made of a titanium or titanium alloy substrate with a cobalt-chrome molybdenum alloy uses multi-arc physical vapor deposition (MA-PVD). The substrate has a first bearing surface coated with a coating made of the deposited cobalt-chromium molybdenum alloy. The bearing surface slidably receives a second bearing surface of the prosthetic joint component. The MA-PVD cobalt-chromium molybdenum alloy coating forming the first bearing surface is made up of hexagonal close packed (HCP) grains having a columnar structure with a length of about 1 ?m and a width of about 0.1 ?m with the length of each HCP grains being oriented generally perpendicular to the titanium substrate bearing surface.Type: GrantFiled: March 4, 2013Date of Patent: June 21, 2016Assignee: Howmedica Osteonics Corp.Inventors: Zongtao Zhang, Keenan Michael Hanson, Thomas Francis McCarthy, Daniel E. Lawrynowicz, Aiguo Wang
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Publication number: 20150376349Abstract: A method for producing a wear resistant polyethylene medical implant includes forming a medical implant, such as an orthopedic implant, made at least partially of ultra high molecular weight polyethylene (UHMWPE). The polyethylene may be irradiated with gamma ray or e-beam radiation to form free radicals and then crosslinked to eliminate free radicals prior to exposure to oxygen. The so treated bearing surface of the crosslinked polyethylene is then coated with a photoinitiator. Thereafter the bearing material is photocrosslinked with ultra-violet (UV) radiation. The photocrosslinking process can also be applied to non-crosslink UHMWPE.Type: ApplicationFiled: September 11, 2015Publication date: December 31, 2015Inventors: Shulin He, Zongtao Zhang, Keenan Michael Hanson, Shi-Shen Yau
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Patent number: 9193033Abstract: A method for improving the bond between a PEEK joint component and bone cement comprising roughening a surface of the PEEK component by air-blasting abrasive water-soluble particles against the component until an average surface roughness of 4 to 6 micrometers is attained and subsequently submerging the component in water to dissolve any residual particles.Type: GrantFiled: March 11, 2013Date of Patent: November 24, 2015Assignee: Howmedica Osteonics Corp.Inventors: Zongtao Zhang, Keenan Michael Hanson, Daniel E. Lawrynowicz
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Publication number: 20150322239Abstract: A method for producing a wear resistant polyethylene medical implant includes forming a medical implant, such as an orthopedic implant, made at least partially of ultra high molecular weight polyethylene (UHMWPE). The polyethylene may be irradiated with gamma ray or e-beam radiation to form free radicals and then crosslinked to eliminate free radicals prior to exposure to oxygen. The so treated bearing surface of the crosslinked polyethylene is then coated with a photoinitiator. Thereafter the bearing material is photocrosslinked with ultra-violet (UV) radiation. The photocrosslinking process can also be applied to non-crosslink UHMWPE.Type: ApplicationFiled: July 22, 2015Publication date: November 12, 2015Inventors: Shulin He, Zongtao Zhang, Keenan Michael Hanson, Shi-Shen Yau
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Patent number: 9132209Abstract: A method for producing a wear resistant polyethylene medical implant includes forming a medical implant, such as an orthopedic implant, made at least partially of ultra high molecular weight polyethylene (UHMWPE). The polyethylene may be irradiated with gamma ray or e-beam radiation to form free radicals and then crosslinked to eliminate free radicals prior to exposure to oxygen. The so treated bearing surface of the crosslinked polyethylene is then coated with a photoinitiator. Thereafter the bearing material is photocrosslinked with ultra-violet (UV) radiation. The photocrosslinking process can also be applied to non-crosslink UHMWPE.Type: GrantFiled: May 7, 2010Date of Patent: September 15, 2015Assignee: Howmedia Osteonics Corp.Inventors: Shulin He, Zongtao Zhang, Keenan Michael Hanson, Shi-Shen Yau
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Publication number: 20140256229Abstract: A method for improving the bond between a PEEK joint component and bone cement comprising roughening a surface of the PEEK component by air-blasting abrasive water-soluble particles against the component until an average surface roughness of 4 to 6 micrometers is attained and subsequently submerging the component in water to dissolve any residual particles.Type: ApplicationFiled: March 11, 2013Publication date: September 11, 2014Applicant: HOWMEDICA OSTEONICS CORP.Inventors: Zongtao Zhang, Keenan Michael Hanson, Daniel E. Lawrynowicz
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Publication number: 20140249642Abstract: An orthopedic implant has a prosthetic joint component made, for example, of polyethylene and another component made of a titanium or titanium alloy substrate. The substrate has a first bearing surface coated with a coating made of a cobalt-chromium molybdenum alloy. The bearing surface slidably receives a second bearing surface of the prosthetic joint component. The cobalt-chromium molybdenum alloy coating forming the first bearing surface is made up of hexagonal close packed (HCP) grains having a columnar structure with a length of about 1 ?m and a width of about 0.1 ?m with the length of each HCP grains being oriented generally perpendicular to the titanium substrate bearing surface.Type: ApplicationFiled: March 4, 2013Publication date: September 4, 2014Applicant: HOWMEDICA OSTEONICS CORP.Inventors: Zongtao Zhang, Keenan Michael Hanson, Thomas Francis McCarthy, Daniel E. Lawrynowicz, Aiguo Wang
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Publication number: 20140222158Abstract: A prosthetic head for a femoral component has a metal shell with a tapered cavity. The shell has a part-spherical outer surface defining an inner portion terminating in an open end. A polymeric material completely fills the inner portion of the hollow shell extending from an inner surface of the shell to the open end. The polymeric material includes a conically tapered socket centered about the polar axis intermediate ends of the open end wherein the shell is a hollow titanium shell having an inner surface with a porous structure for receiving a portion of the polymeric material. The hollow titanium shell inner surface has at least one rib extending inwardly toward the conically tapered socket.Type: ApplicationFiled: February 6, 2013Publication date: August 7, 2014Applicant: HOWMEDICA OSTEONICS CORP.Inventors: Daniel E. Lawrynowicz, Haitong Zeng, Zongtao Zhang, Aiguo Wang, Keenan Michael Hanson
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Publication number: 20110276143Abstract: A method for producing a wear resistant polyethylene medical implant includes forming a medical implant, such as an orthopedic implant, made at least partially of ultra high molecular weight polyethylene (UHMWPE). The polyethylene may be irradiated with gamma ray or e-beam radiation to form free radicals and then crosslinked to eliminate free radicals prior to exposure to oxygen. The so treated bearing surface of the crosslinked polyethylene is then coated with a photoinitiator. Thereafter the bearing material is photocrosslinked with ultra-violet (UV) radiation. The photocrosslinking process can also be applied to non-crosslink UHMWPE.Type: ApplicationFiled: May 7, 2010Publication date: November 10, 2011Applicant: HOWMEDICA OSTEONICS CORP.Inventors: Shulin He, Zongtao Zhang, Keenan Michael Hanson, Shi-Shen Yau, Daniel E. Lawrynowicz, Aiguo Wang