Patents by Inventor Kevin J. Stewart

Kevin J. Stewart 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: 20240261098
    Abstract: Prosthetic heart valve assemblies and methods, apparatus, and systems used to deliver a prosthetic heart valve assembly. A prosthetic heart valve assembly includes an inner frame, a prosthetic leaflet section disposed within the inner frame extending between in inflow row of cells and an outflow row of cells of the inner frame, and an outer support stent. The inner frame is disposed within the outer support stent, and the outer support stent is coupled and/or fastened to the inner frame. The outer support stent includes a plurality leaflet capturing arms for capturing native leaflets between the leaflet capturing arms and a portion of the prosthetic heart valve assembly when the prosthetic heart valve assembly is implanted in a native valve. For example, the native leaflets can be frictionally secured between the leaflet capturing arms of the support stent and the inner frame.
    Type: Application
    Filed: April 2, 2024
    Publication date: August 8, 2024
    Inventors: Christopher J. Olson, Glen T. Rabito, Dustin P. Armer, Minh T. Ma, Devin H. Marr, Cheng-Tung Huang, Hiroshi Okabe, Kevin M. Stewart, Alison S. Curtis, Philip P. Corso, JR.
  • Patent number: 11084236
    Abstract: A method for preparing an optical element which colors in a non-uniform linear pattern is provided.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: August 10, 2021
    Assignee: Transitions Optical, Inc.
    Inventors: Joseph D. Turpen, Jennine M. Frease, William D. Carpenter, Kevin J. Stewart
  • Patent number: 10371866
    Abstract: The present invention relates to an optical element that includes a mark (18). The optical element has a first coating layer (22) over at least a portion of a surface of an optical substrate (20) having the mark (18) on the surface of the optical substrate, and one or more additional coating layers (24) over at least a portion of the first coating layer (22). The first coating layer has a first refractive index, and the optical substrate and the mark may have a second refractive index. A difference between the first refractive index and the second refractive index has an absolute value of 0.02 to 0.24. At least one of the first coating layer (22) and the one or more additional coating layers (24) may be applied by a controlled deposition of a coating material in droplet form.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: August 6, 2019
    Assignee: Transitions Optical, Ltd.
    Inventors: Jennine M. Frease, Joseph D. Turpen, William D. Carpenter, Kevin J. Stewart
  • Publication number: 20180095190
    Abstract: The present invention relates to an optical element that includes a mark (18). The optical element has a first coating layer (22) over at least a portion of a surface of an optical substrate (20) having the mark (18) on the surface of the optical substrate, and one or more additional coating layers (24) over at least a portion of the first coating layer (22). The first coating layer has a first refractive index, and the optical substrate and the mark may have a second refractive index. A difference between the first refractive index and the second refractive index has an absolute value of 0.02 to 0.24. At least one of the first coating layer (22) and the one or more additional coating layers (24) may be applied by a controlled deposition of a coating material in droplet form.
    Type: Application
    Filed: March 10, 2016
    Publication date: April 5, 2018
    Inventors: Jennine M. Frease, Joseph D. Turpen, William D. Carpenter, Kevin J. Stewart
  • Publication number: 20180056615
    Abstract: A method for preparing an optical element which colors in a non-uniform linear pattern is provided.
    Type: Application
    Filed: March 10, 2015
    Publication date: March 1, 2018
    Inventors: Joseph D. Turpen, Jennine M. Frease, William D. Carpenter, Kevin J. Stewart
  • Patent number: 9304330
    Abstract: The invention provides a multi-layer experiential optical device including at least one polymeric layer having a first side and an opposing second side, and having a light-influencing property; and a low tack pressure sensitive adhesive layer applied on at least a peripheral zone of the second side of the polymeric layer. The experiential optical device is reversibly adherent to an optical lens.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: April 5, 2016
    Assignee: Transitions Optical, Inc.
    Inventors: David Park, Kevin J. Stewart, Anil Kumar
  • Publication number: 20140232978
    Abstract: The invention provides a multi-layer experiential optical device including at least one polymeric layer having a first side and an opposing second side, and having a light-influencing property; and a low tack pressure sensitive adhesive layer applied on at least a peripheral zone of the second side of the polymeric layer. The experiential optical device is reversibly adherent to an optical lens.
    Type: Application
    Filed: February 19, 2014
    Publication date: August 21, 2014
    Inventors: David Park, Kevin J. Stewart, Anil Kumar
  • Patent number: 8563213
    Abstract: Described are various methods of producing non-aqueous dispersions of photosensitive polymeric microparticles, comprising: (a) preparing one or more aqueous dispersions of a polymerizable component, at least one of which contains a photosensitive material and, wherein the polymerizable components comprise at least one hydrophilic functional group and/or at least one hydrophobic functional group; (b) subjecting the dispersion of (a) to conditions sufficient to form microparticles; (c) at least partially polymerizing the polymerizable component; (d) combining the dispersion with an organic continuous phase comprising an organic solvent; (e) removing water from the dispersion such that the final water content of the non-aqueous dispersion is less than 30 percent by weight; wherein e) is performed before or after d); and (f) reacting any acid functional groups on the surface of the microparticles with a reactive material having at least one epoxy functional group, at least one thiocarbonylthio functional group, a
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: October 22, 2013
    Assignee: Transitions Optical, Inc.
    Inventors: Steven E. Bowles, Anu Chopra, Randy E. Daughenbaugh, Dennis L. Faler, M. Frank Haley, Paul H. Lamers, Yunyi Lu, Kevin J. Stewart, Cathy A. Taylor, Feng Wang, Elizabeth A. Zezinka
  • Patent number: 8563212
    Abstract: Described are non-aqueous dispersions of photosensitive polymeric microparticles, comprising: a) an organic continuous phase comprising an organic solvent; and b) photosensitive polymeric microparticles dispersed in the organic continuous phase. The microparticles comprise an at least partially polymerized component having integral surface and interior domains, wherein the surface domain comprises a polymeric material that is solubilized by the organic solvent, the interior domain comprises a polymeric material that is insoluble in the organic solvent, and the surface domain and/or interior domain is photosensitive. Also described are methods of producing such non-aqueous dispersions, curable film-forming compositions containing them, and photosensitive coated substrates.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: October 22, 2013
    Assignee: Transitions Optical, Inc.
    Inventors: Steven E. Bowles, Anu Chopra, James P. Colton, Dennis L. Faler, M. Frank Haley, Paul H. Lamers, Yunyi Lu, Kevin J. Stewart, Cathy A. Taylor, Feng Wang, Elizabeth A. Zezinka
  • Patent number: 8547625
    Abstract: Provided is a photochromic optical article including: (a) an optical substrate; (b) a thermally reversible photochromic material; and (c) reversible thermochromic material capable of at least partially filtering UV/visible light at or below room temperature and becoming less capable of filtering UV/visible light at temperatures greater than room temperature. The reversible thermochromic material (c) is operable for filtering light in the range of from 300 to 450 nanometers.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: October 1, 2013
    Assignee: Transitions Optical, Inc.
    Inventors: David B. Knowles, Stephen D. Straight, Kevin J. Stewart, Forrest R. Blackburn
  • Patent number: 8153344
    Abstract: Described are aqueous compositions of an effective amount of at least one photosensitive material and at least one polymerizable component that are adapted to at least partially form photosensitive microparticles or at least partially crosslinked photosensitive polymeric microparticles. The photosensitive polymeric microparticles are made of integral surface and interior domains wherein at least one of the surface and/or interior domains is photosensitive. Also described are aqueous dispersions of such microparticles, ways of producing such microparticles and photosensitive articles such as optical elements that incorporate the photosensitive polymeric microparticles.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: April 10, 2012
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Dennis L. Faler, Forrest R. Blackburn, Kevin J. Stewart, Anu Chopra, James P. Colton
  • Patent number: 7911676
    Abstract: Provided is a photochromic optical articleincluding: (a) an optical substrate; (b) a thermally reversible photochromic material; and (c) reversible thermochromic material capable of at least partially filtering UV/visible light at or below room temperature and becoming less capable of filtering UV/visible light at temperatures greater than room temperature.
    Type: Grant
    Filed: November 6, 2009
    Date of Patent: March 22, 2011
    Assignee: Transitions Optical, Inc.
    Inventors: David B. Knowles, Stephen D. Straight, Kevin J. Stewart, Forrest R. Blackburn
  • Publication number: 20110051223
    Abstract: Provided is a photochromic optical article including: (a) an optical substrate; (b) a thermally reversible photochromic material; and (c) reversible thermochromic material capable of at least partially filtering UV/visible light at or below room temperature and becoming less capable of filtering UV/visible light at temperatures greater than room temperature. The reversible thermochromic material (c) is operable for filtering light in the range of from 300 to 450 nanometers.
    Type: Application
    Filed: November 9, 2010
    Publication date: March 3, 2011
    Applicant: TRANSITIONS OPTICAL, INC.
    Inventors: David B. Knowles, Stephen D. Straight, Kevin J. Stewart, Forrest R. Blackburn
  • Publication number: 20100221661
    Abstract: Described are various methods of producing non-aqueous dispersions of photosensitive polymeric microparticles, comprising: (a) preparing one or more aqueous dispersions of a polymerizable component, at least one of which contains a photosensitive material and, wherein the polymerizable components comprise at least one hydrophilic functional group and/or at least one hydrophobic functional group; (b) subjecting the dispersion of (a) to conditions sufficient to form microparticles; (c) at least partially polymerizing the polymerizable component; (d) combining the dispersion with an organic continuous phase comprising an organic solvent; (e) removing water from the dispersion such that the final water content of the non-aqueous dispersion is less than 30 percent by weight; wherein e) is performed before or after d); and (f) reacting any acid functional groups on the surface of the microparticles with a reactive material having at least one epoxy functional group, at least one thiocarbonylthio functional group, a
    Type: Application
    Filed: March 8, 2010
    Publication date: September 2, 2010
    Applicant: Transitions Optical, Inc.
    Inventors: Steven E. Bowles, Anu Chopra, Randy E. Daughenbaugh, Dennis L. Faler, M. Frank Haley, Paul H. Lamers, Yunyi Lu, Kevin J. Stewart, Cathy A. Taylor, Feng Wang, Elizabeth A. Zezinka
  • Publication number: 20100209697
    Abstract: Described are non-aqueous dispersions of photosensitive polymeric microparticles, comprising: a) an organic continuous phase comprising an organic solvent; and b) photosensitive polymeric microparticles dispersed in the organic continuous phase. The microparticles comprise an at least partially polymerized component having integral surface and interior domains, wherein the surface domain comprises a polymeric material that is solubilized by the organic solvent, the interior domain comprises a polymeric material that is insoluble in the organic solvent, and the surface domain and/or interior domain is photosensitive. Also described are methods of producing such non-aqueous dispersions, curable film-forming compositions containing them, and photosensitive coated substrates.
    Type: Application
    Filed: March 8, 2010
    Publication date: August 19, 2010
    Applicant: Transitions Optical, Inc.
    Inventors: Steven E. Bowles, Anu Chopra, James P. Colton, Dennis L. Faler, M. Frank Haley, Paul H. Lamers, Yunyi Lu, Kevin J. Stewart, Cathy A. Taylor, Feng Wang, Elizabeth A. Zezinka
  • Publication number: 20100149620
    Abstract: Provided is a photochromic optical articleincluding: (a) an optical substrate; (b) a thermally reversible photochromic material; and (c) reversible thermochromic material capable of at least partially filtering UV/visible light at or below room temperature and becoming less capable of filtering UV/visible light at temperatures greater than room temperature.
    Type: Application
    Filed: November 6, 2009
    Publication date: June 17, 2010
    Applicant: Transitions Optical, Inc.
    Inventors: David B. Knowles, Stephen D. Straight, Kevin J. Stewart, Forrest R. Blackburn
  • Patent number: 7666331
    Abstract: Describes an article, e.g., an optical article such as a lens, in which the article includes (a) a rigid substrate, e.g., a transparent ophthalmic substrate, such as a thermoset or thermoplastic substrate, having at least one surface suitable for accommodating a photochromic coating, and (b) a transparent photochromic coating comprising dendritic polymeric acrylate, e.g., polyester acrylate, on at least a portion of said surface of the substrate, the coating comprising a photochromic amount of at least one photochromic material, e.g., an organic photochromic material.
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: February 23, 2010
    Assignee: Transitions Optical, Inc.
    Inventors: Eric M. King, Kevin J. Stewart
  • Patent number: 7666510
    Abstract: Described are optical elements made of a substrate and a curable film-forming composition applied to at least a portion of the substrate to form a coating thereon. The curable film-forming composition comprises: i) a resinous material comprising a monomer, oligomer, and/or polymer containing reactive functional groups; ii) a curing agent having two or more reactive functional groups that are reactive with functional groups in the resinous material of i); and iii) a material different from i) and ii), comprising a blocked isocyanate group blocked with a blocking agent capable of deblocking at a low temperature. The material of iii) is present in the curable film-forming composition at least in an amount sufficient to improve adhesion between the curable film-forming composition and the substrate and/or a superposed coating compared to a substantially identical optical element that does not comprise the material of iii) in the curable film-forming composition.
    Type: Grant
    Filed: September 7, 2005
    Date of Patent: February 23, 2010
    Assignee: Transitions Optical, Inc.
    Inventor: Kevin J. Stewart
  • Patent number: 7465415
    Abstract: Various non-limiting embodiments disclosed herein related to photochromic materials comprising the reaction product of (a) at least one ring-opening cyclic monomer, and (b) a photochromic initiator. Other non-limiting embodiments related to photochromic materials represented by: wherein S? comprises the at least one ring-opened cyclic monomer as set forth herein. Other non-limiting embodiments related to photochromic compositions, optical elements, and methods of inhibiting migration of a photochromic material in a polymeric material using the photochromic materials disclosed herein. Methods of making such photochromic materials, compositions, and optical elements are also disclosed.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: December 16, 2008
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Feng Wang, Barry Van Gemert, Kevin J. Stewart, Carol L. Knox, Anu Chopra, Patrick M. Brown
  • Patent number: 7410691
    Abstract: Describes a photochromic article, e.g., a plastic ophthalmic photochromic article, such as a lens, in which the article includes (1) a rigid substrate, such as a thermoset or thermoplastic polymeric substrate, (2) a photochromic polymeric coating appended to at least one surface of the substrate, the photochromic polymeric coating containing a photochromic amount of at least one photochromic material, e.g., spirooxazine, naphthopyran and/or fulgide, and (3) an acrylate-based film coherently appended to the photochromic coating, the acrylate-based film containing an adhesion promoting amount of an adhesion promoter, e.g., an aminoorganosilane, silane coupling agent, organic titanate coupling agent or organic zirconate coupling agent. Describes also the aforedescribed photochromic article having an abrasion-resistant coating affixed to the acrylate-based film, e.g.
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: August 12, 2008
    Assignee: PPG Industries Ohio, Inc.
    Inventors: William P. Blackburn, Michael B. Levesque, Kevin J. Stewart, Cathy L. Short