Patents by Inventor Vivek Pawar
Vivek Pawar 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: 9297080Abstract: A coating of blue-black or black zirconium of uniform and controlled thickness on a zirconium or zirconium alloy material is accomplished through the treatment of an amorphous zirconium or zirconium alloy substrate, which may have an altered surface roughness. The treatment of amorphous zirconium or zirconium alloy substrates includes oxidation of the substrates. A zirconium coating of uniform and controlled thickness is especially useful in various applications because the uniformly thick zirconium surface of controlled depth provide a barrier against implant corrosion caused by ionization of the metal substrates.Type: GrantFiled: October 14, 2013Date of Patent: March 29, 2016Assignee: Smith & Nephew, Inc.Inventors: Gordon Hunter, Shilesh Jani, Vivek Pawar
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Patent number: 8795441Abstract: The present invention relates to a method of reworking a composition comprising a substrate and an oxidation and/or nitridation layer on the surface of the substrate by treating the composition under reduced pressure or in an inert gas environment at an elevated temperature until the oxidation and/or nitridation layer is substantially removed from the surface. In this way, manufacturing efficiencies and yields are improved as material that would otherwise have been scrapped is now used.Type: GrantFiled: April 25, 2007Date of Patent: August 5, 2014Assignee: Smith & Nephew, Inc.Inventors: Vivek Pawar, Shilesh C. Jani, Carolyn Weaver
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Publication number: 20140046453Abstract: The present invention relates to a new composition and medical implant made therefrom, the composition comprising a thick diffusion hardened zone, and preferably further comprising a ceramic layer. The present invention relates to orthopedic implants comprising the new composition, methods of making the new composition, and methods of making orthopedic implants comprising the new composition.Type: ApplicationFiled: September 16, 2013Publication date: February 13, 2014Applicant: SMITH & NEPHEW, INC.Inventors: Vivek PAWAR, Shilesh C JANI, Carolyn L WEAVER
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Publication number: 20140041765Abstract: A coating of blue-black or black zirconium of uniform and controlled thickness on a zirconium or zirconium alloy material is accomplished through the treatment of an amorphous zirconium or zirconium alloy substrate, which may have an altered surface roughness. The treatment of amorphous zirconium or zirconium alloy substrates includes oxidation of the substrates. A zirconium coating of uniform and controlled thickness is especially useful in various applications because the uniformly thick zirconium surface of controlled depth provide a barrier against implant corrosion caused by ionization of the metal substrates.Type: ApplicationFiled: October 14, 2013Publication date: February 13, 2014Applicant: Smith & Nephew, Inc.Inventors: Gordon Hunter, Shilesh Jani, Vivek Pawar
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Patent number: 8647701Abstract: Methods of making surface hardened medical implants comprising providing a biocompatible alloy with a surface comprising an oxide or nitride layer, diffusing at least a portion of the respective oxygen or nitrogen from the oxide or nitride layer the substrate for a period of time to form a diffusion hardened zone of desired thickness. The period of time is based at least on (1) the diffusivity of a diffusing specie in the oxide or nitride layer, (2) a desired hardness profile of at least a portion of said implant defined by a function selected from the group consisting of: an error function, an exponential function, a near uniform distribution function, and any sequential combination thereof, or (3) a desired thickness of said oxide or nitride layer to be retained.Type: GrantFiled: June 27, 2011Date of Patent: February 11, 2014Assignee: Smith & Nephew, Inc.Inventors: Vivek Pawar, Shilesh C. Jani, Carolyn Weaver
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Patent number: 8556987Abstract: A coating of blue-black or black zirconium of uniform and controlled thickness on a zirconium or zirconium alloy material is accomplished through the treatment of an amorphous zirconium or zirconium alloy substrate, which may have an altered surface roughness. The treatment of amorphous zirconium or zirconium alloy substrates includes oxidation of the substrates. A zirconium coating of uniform and controlled thickness is especially useful in various applications because the uniformly thick zirconium surface of controlled depth provide a barrier against implant corrosion caused by ionization of the metal substrates.Type: GrantFiled: December 17, 2010Date of Patent: October 15, 2013Assignee: Smith & Nephew, Inc.Inventors: Gordon Hunter, Shilesh C. Jani, Vivek Pawar
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Patent number: 8361381Abstract: A process for making a diffusion hardened medical implant having a porous surface is disclosed. The medical implant is made by a hot isostatic pressing process which simultaneously forms that porous surface and the diffusion hardened surface.Type: GrantFiled: July 21, 2009Date of Patent: January 29, 2013Assignee: Smith & Nephew, Inc.Inventors: Daniel A. Heuer, Vivek Pawar, Marcus Lee Scott, Shilesh C. Jani
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Publication number: 20120245697Abstract: A porous medical implant and a method of making same is described. The medical implant comprises a porous surface formed by application of pulsed electrical energy ins such a way as to cause a localized heating in the surface of the material comprising portions of the implant. The method comprises a pulsed current sintering technique.Type: ApplicationFiled: June 4, 2012Publication date: September 27, 2012Applicant: Smith & Nephew Inc.Inventors: Gordon Hunter, Vivek Pawar, Daniel A. Heuer, Abraham Salehi, Michael B. Cooper
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Patent number: 8172958Abstract: The present disclosure provides methods of making an improved composition and medical implant made therefrom. The methods generally comprise forming a ceramic layer, diffusion hardening, and optionally, forming another ceramic layer. The present disclosure provides methods of making an improved composition having a thick diffusion hardened zone and orthopedic implants comprising the improved composition.Type: GrantFiled: May 27, 2008Date of Patent: May 8, 2012Assignee: Smith & Nephew, Inc.Inventors: Vivek Pawar, Shilesh C. Jani, Carolyn Weaver
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Publication number: 20110320007Abstract: The present invention relates to a new composition and medical implant made therefrom, the composition comprising a thick diffusion hardened zone, and preferably further comprising a ceramic layer. The present invention relates to orthopedic implants comprising the new composition, methods of making the new composition, and methods of making orthopedic implants comprising the new composition.Type: ApplicationFiled: June 27, 2011Publication date: December 29, 2011Applicant: SMITH & NEPHEW, INC., RECONSTRUCTIVEInventors: Vivek Pawar, Shilesh C. Jani, Carolyn Weaver
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Patent number: 7968209Abstract: The present invention relates to a new composition and medical implant made therefrom, the composition comprising a thick diffusion hardened zone, and preferably further comprising a ceramic layer. The present invention relates to orthopedic implants comprising the new composition, methods of making the new composition, and methods of making orthopedic implants comprising the new composition.Type: GrantFiled: October 2, 2008Date of Patent: June 28, 2011Assignee: Smith & Nephew, Inc.Inventors: Vivek Pawar, Shilesh C. Jani, Carolyn Weaver
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Publication number: 20110139312Abstract: A coating of blue-black or black zirconium of uniform and controlled thickness on a zirconium or zirconium alloy material is accomplished through the treatment of an amorphous zirconium or zirconium alloy substrate, which may have an altered surface roughness. The treatment of amorphous zirconium or zirconium alloy substrates includes oxidation of the substrates. A zirconium coating of uniform and controlled thickness is especially useful in various applications because the uniformly thick zirconium surface of controlled depth provide a barrier against implant corrosion caused by ionization of the metal substrates.Type: ApplicationFiled: December 17, 2010Publication date: June 16, 2011Applicant: Smith & Nephew, Inc.Inventors: Gordon Hunter, Shilesh C. Jani, Vivek Pawar
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Patent number: 7896926Abstract: A coating of blue-black or black oxidized zirconium of uniform and controlled thickness on a zirconium or zirconium alloy material is accomplished through the oxidative treatment of an amorphous zirconium or zirconium alloy substrate having an altered surface roughness. An oxidized zirconium coating of uniform and controlled thickness is especially useful on orthopedic implants of zirconium or zirconium-based alloys to provide low friction, highly wear resistant surfaces on artificial joints, such as, but not limited to, hip joints, knee joints, shoulders, elbows, and spinal implants. The uniformly thick oxidized zirconium surface of controlled depth on prostheses provide a barrier against implant corrosion caused by ionization of the metal prostheses. The invention is also useful in non-articulating implant devices such as bone plates, bone screws, etc.Type: GrantFiled: November 24, 2008Date of Patent: March 1, 2011Assignee: Smith & Nephew, Inc.Inventors: Gordon Hunter, Shilesh C. Jani, Vivek Pawar
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Publication number: 20110015756Abstract: A medical implant is disclosed. The medical implant includes: a first biocompatible metal forming a substrate (210, 310, 410), a second biocompatible metal diffused into the first biocompatible metal to form an biocompatible alloy surface (220, 314, 414), the alloy surface further including a diffusion hardening species, wherein the diffusion hardening species may be carbon, nitrogen, oxygen, boron, or any combination thereof. A method of forming a medical implant is also disclosed. The method includes the steps of: providing a first biocompatible metal or alloy that forms a substrate (210, 310, 410), providing a second biocompatible metal or alloy, diffusing the second biocompatible metal into the first biocompatible metal to form an alloy layer (220, 314, 414), removing excess second metal material from the substrate to expose the alloy layer, and diffusion hardening the alloy layer.Type: ApplicationFiled: January 2, 2009Publication date: January 20, 2011Applicant: SMITH & NEPHEW INC.Inventors: Vivek Pawar, Donald E. Kramer, Carolyn L. Weaver, Shilesh C. Jani
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Publication number: 20100074789Abstract: A process for making a diffusion hardened medical implant having a porous surface is disclosed. The medical implant is made by a hot isostatic pressing process which simultaneously forms that porous surface and the diffusion hardened surface.Type: ApplicationFiled: July 21, 2009Publication date: March 25, 2010Applicant: Smith & Nephew Inc.Inventors: DANIEL A. HEUER, Vivek Pawar, Marcus L. Scott, Shilesh C. Jani
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Patent number: 7648735Abstract: A composition, a medical implant constructed from the composition, and a method of making the composition are described. The composition is a composite material, comprising a porous, reticulated, open cell network having at least part of its surface coated with blue-black or black oxidized zirconium.Type: GrantFiled: August 5, 2005Date of Patent: January 19, 2010Assignee: Smith & Nephew, Inc.Inventors: Gordon Hunter, Vivek Pawar
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Patent number: 7550209Abstract: The present invention relates to a new composition and medical implant made therefrom, the composition comprising a thick diffusion hardened zone, and preferably further comprising a ceramic layer. The present invention relates to orthopedic implants comprising the new composition, methods of making the new composition, and methods of making orthopedic implants comprising the new composition.Type: GrantFiled: November 10, 2006Date of Patent: June 23, 2009Assignee: Smith & Nephew, Inc.Inventors: Vivek Pawar, Shilesh C. Jani, Carolyn Weaver
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Publication number: 20090112331Abstract: A coating of blue-black or black oxidized zirconium of uniform and controlled thickness on a zirconium or zirconium alloy material is accomplished through the oxidative treatment of an amorphous zirconium or zirconium alloy substrate having an altered surface roughness. An oxidized zirconium coating of uniform and controlled thickness is especially useful on orthopedic implants of zirconium or zirconium-based alloys to provide low friction, highly wear resistant surfaces on artificial joints, such as, but not limited to, hip joints, knee joints, shoulders, elbows, and spinal implants. The uniformly thick oxidized zirconium surface of controlled depth on prostheses provide a barrier against implant corrosion caused by ionization of the metal prostheses. The invention is also useful in non-articulating implant devices such as bone plates, bone screws, etc.Type: ApplicationFiled: November 24, 2008Publication date: April 30, 2009Inventors: Gordon Hunter, Shilesh C. Jani, Vivek Pawar
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Publication number: 20090074836Abstract: The present invention relates to a new composition and medical implant made therefrom, the composition comprising a thick diffusion hardened zone, and preferably further comprising a ceramic layer. The present invention relates to orthopedic implants comprising the new composition, methods of making the new composition, and methods of making orthopedic implants comprising the new composition.Type: ApplicationFiled: October 2, 2008Publication date: March 19, 2009Inventors: Vivek Pawar, Shilesh C. Jani, Carolyn Weaver
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Publication number: 20090012611Abstract: A prosthesis having an oxidized zirconium surface and a porous textured surface is described. A major advantage of the prosthesis is increased service life. Additionally, a process of manufacturing the prosthesis is described.Type: ApplicationFiled: June 27, 2008Publication date: January 8, 2009Applicant: Smith & Nephew, Inc.Inventors: Robert E. Brosnahan, III, Randy Fesmire, Harsh Gupta, Daniel A. Heuer, Gordon Hunter, Vivek Pawar