Patents by Inventor Ray F. Stewart

Ray F. 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: 20200130333
    Abstract: Improved dental appliances and polymeric sheet compositions are disclosed. The polymeric sheet compositions are useful for making dental appliances having outer layers comprised of a material having a modulus of from about 1,000 MPA to 2,500 MPA (“hard”) and an inner core comprised of elastomeric material or materials having a modulus of from about 50 MPa to 500 MPa (“soft”), which exhibit improved flexibility and strength, and better stain and tear resistance than currently available materials and dental appliances.
    Type: Application
    Filed: December 18, 2019
    Publication date: April 30, 2020
    Inventors: Ray F. Stewart, John Lahlouh
  • Publication number: 20200114628
    Abstract: Improved dental appliances and polymeric sheet compositions are disclosed. The polymeric sheet compositions are useful for making dental appliances having outer layers comprised of a material having a modulus of from about 1,000 MPA to 2,500 MPA (“hard”) and an inner core comprised of elastomeric material or materials having a modulus of from about 50 MPa to 500 MPa (“soft”), which exhibit improved flexibility and strength, and better stain and tear resistance than currently available materials and dental appliances.
    Type: Application
    Filed: December 12, 2019
    Publication date: April 16, 2020
    Inventors: Ray F. Stewart, John Lahlouh
  • Patent number: 10549511
    Abstract: Improved dental appliances and polymeric sheet compositions are disclosed. The polymeric sheet compositions are useful for making dental appliances having outer layers comprised of a material having a modulus of from about 1,000 MPA to 2,500 MPA (“hard”) and an inner core comprised of elastomeric material or materials having a modulus of from about 50 MPa to 500 MPa (“soft”), which exhibit improved flexibility and strength, and better stain and tear resistance than currently available materials and dental appliances.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: February 4, 2020
    Assignee: Bay Materials, LLC
    Inventors: Ray F. Stewart, John Lahlouh
  • Publication number: 20200015937
    Abstract: Described are improved dental materials and appliances made therefrom that have a range of flexibility and strength and exhibit improved comfort and effectiveness in orthodontic and other treatment.
    Type: Application
    Filed: March 1, 2018
    Publication date: January 16, 2020
    Inventor: Ray F. Stewart
  • Publication number: 20190105881
    Abstract: Improved dental appliances and polymeric sheet compositions are disclosed. The polymeric sheet compositions are useful for making dental appliances having outer layers comprised of a material having a modulus of from about 1,000 MPA to 2,500 MPA (“hard”) and an inner core comprised of elastomeric material or materials having a modulus of from about 50 MPa to 500 MPa (“soft”), which exhibit improved flexibility and strength, and better stain and tear resistance than currently available materials and dental appliances.
    Type: Application
    Filed: December 5, 2018
    Publication date: April 11, 2019
    Inventors: Ray F. Stewart, John Lahlouh
  • Patent number: 9918813
    Abstract: Polymeric shells which fit over natural teeth to change the perceived color of the teeth, and optionally to provide orthodontic support. The shells are prepared by thermoforming selected polymeric sheets which contain optical additives; the optical additives cause the combination of the shell and the teeth to have a desired appearance. The shell preferably has transparency of greater than 75%, particularly greater than 85%.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: March 20, 2018
    Assignee: BAY MATERIALS LLC
    Inventor: Ray F Stewart
  • Patent number: 9259598
    Abstract: Aqueous dispersions of crystalline polymers based on hydrophobic monomers, preferably on a mixture of hydrophobic and hydrophilic monomers which contains a crosslinking monomer, particularly side chain crystalline (SCC) polymers. The dispersions are useful for providing coatings on substrates, particularly on seeds (whose dormancy is thus extended) and on fibrous substrates, particularly human hair (which thus becomes heat-settable).
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: February 16, 2016
    Assignee: Landec, Inc.
    Inventors: Ray F. Stewart, Natarajan Balachander, Steven P. Bitler, Loc Phan, Valentine Y. Yoon
  • Publication number: 20150374464
    Abstract: Polymeric shells which fit over natural teeth to change the perceived color of the teeth, and optionally to provide orthodontic support. The shells are prepared by thermoforming selected polymeric sheets which contain optical additives; the optical additives cause the combination of the shell and the teeth to have a desired appearance. The shell preferably has transparency of greater than 75%, particularly greater than 85%.
    Type: Application
    Filed: February 27, 2013
    Publication date: December 31, 2015
    Inventor: Ray F. STEWART
  • Publication number: 20140339075
    Abstract: The use, in corrosion protection systems, dewatering systems, and systems to reduce biofouling, of an anode which comprises a conductive polymer composition comprising a polymer and, mixed with the polymer, a conductive filler which comprises an exfoliated graphite.
    Type: Application
    Filed: January 5, 2013
    Publication date: November 20, 2014
    Inventors: Ray F. Stewart, John Lahlouh
  • Publication number: 20140239224
    Abstract: This invention relates to a method for preparing a lithium aluminate intercalate (LAI) matrix solid and methods for the selective extraction and recovery of lithium from lithium containing solutions, including brines. The method for preparing the LAI matrix solid includes reacting aluminum hydroxide and a lithium salt for form the lithium aluminate intercalate, which can then be mixed with up to about 25% by weight of a polymer to form the LAI matrix.
    Type: Application
    Filed: May 5, 2014
    Publication date: August 28, 2014
    Applicant: Simbol Inc.
    Inventors: John L. Burba, Ray F. Stewart, Brian E. Viani, Stephen Harrison, Christine ellen Vogdes, John Galil Salim Lahlouh
  • Patent number: 8753594
    Abstract: This invention relates to a method for preparing a lithium aluminate intercalate (LAI) matrix solid and methods for the selective extraction and recovery of lithium from lithium containing solutions, including brines. The method for preparing the LAI matrix solid includes reacting aluminum hydroxide and a lithium salt for form the lithium aluminate intercalate, which can then be mixed with up to about 20% by weight of a polymer to form the LAI matrix.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: June 17, 2014
    Assignee: Simbol, Inc.
    Inventors: John L. Burba, III, Ray F. Stewart, Brian E. Viani, Stephen Harrison, Christine Ellen Vogdes, John Galil Salim Lahlouh
  • Patent number: 8716425
    Abstract: A method of improving the mechanical properties of polymers is described. The method involves heat treating the polymer at a temperature below the glass transition temperature in a wet or in a dry environment. Polymer articles capable of moisture uptake in humid environments, as well as polymer articles less susceptible to moisture uptake, have improved mechanical properties, particularly improved stress relaxation behavior and set properties, when treated in accord with the heat treatment method.
    Type: Grant
    Filed: July 29, 2005
    Date of Patent: May 6, 2014
    Assignee: Bay Materials, LLC
    Inventors: Ray F. Stewart, John G. Lahlouh
  • Patent number: 8426207
    Abstract: Devices, methods and systems effective to evaluate a physical or chemical property of an ion exchange resin-treated biological fluid sample are provided.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: April 23, 2013
    Assignee: Cantimer, Inc.
    Inventors: Ray F. Stewart, Aaron Dickerman-Stewart
  • Patent number: 8349610
    Abstract: Devices, methods and systems effective to evaluate a physical or chemical property of a surfactant-treated biological fluid sample are provided.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: January 8, 2013
    Assignee: Cantimer, Inc.
    Inventors: Ray F. Stewart, Kathryn M. Morton, Aaron Dickerman-Stewart, Nathan Mak
  • Patent number: 8282230
    Abstract: An LED bulb includes at least one LED mount disposed within a shell. At least one LED is attached to the at least one LED mount. A thermally conductive liquid is held within the shell. The LED and LED mount are immersed in the thermally conductive liquid. A plurality of beads is suspended in the thermally conductive liquid. The plurality of beads is configured to displace a predetermined amount of the thermally conductive liquid to reduce the amount of thermally conductive liquid held within the shell.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: October 9, 2012
    Assignee: Switch Bulb Company, Inc.
    Inventors: Ray F. Stewart, Brett Sharenow, David Horn
  • Patent number: 8263017
    Abstract: The subject matter described herein relates to thermoresponsive switching materials that undergo a thermal transition over a narrow temperature range and to devices, such as actuators, indicators, and sensors, prepared from such compositions.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: September 11, 2012
    Assignee: Bay Materials, LLC
    Inventors: Ray F. Stewart, Debra L. Dunson
  • Patent number: 8083969
    Abstract: Devices are described that include a component comprised of a material having a structure of R1—C(O)—NX—R2, wherein each of R1 and R2 is independently a saturated alkyl having between 7-22 carbon atoms or an aryl, X is H or C(O)—Y, Y together with R1 forms a ring. The material is characterized by a single, sharp melting point, thus making it suitable for use, for example, in thermo-mechanical actuating devices or in temperature-indicating devices. Also described are compositions comprising two or more materials each having a structure of Rn1—C(O)—NH—Rn2 wherein, n is an identifying integer corresponding to a material in the composition; wherein for each material n in the composition, Rn1 and Rn2 are a saturated alkyl having between 7-22 carbon atoms, wherein for each material n Rn1 and Rn2 differ by one carbon atom, arid wherein the number of carbon atoms in Rn2 of each material n differs by four or less.
    Type: Grant
    Filed: November 2, 2010
    Date of Patent: December 27, 2011
    Assignee: Bay Materials, LLC
    Inventor: Ray F. Stewart
  • Publication number: 20110228516
    Abstract: An LED bulb includes at least one LED mount disposed within a shell. At least one LED is attached to the at least one LED mount. A thermally conductive liquid is held within the shell. The LED and LED mount are immersed in the thermally conductive liquid. A plurality of beads is suspended in the thermally conductive liquid. The plurality of beads is configured to displace a predetermined amount of the thermally conductive liquid to reduce the amount of thermally conductive liquid held within the shell.
    Type: Application
    Filed: March 23, 2011
    Publication date: September 22, 2011
    Applicant: Switch Bulb Company, Inc.
    Inventors: Ray F. STEWART, Brett Sharenow, David Horn
  • Publication number: 20110076776
    Abstract: Devices, methods and systems effective to evaluate a physical or chemical property of an ion exchange resin-treated biological fluid sample are provided.
    Type: Application
    Filed: May 20, 2009
    Publication date: March 31, 2011
    Inventors: Ray F. Stewart, Aaron Dickerman-Stewart
  • Publication number: 20110076775
    Abstract: Devices, methods and systems effective to evaluate a physical or chemical property of a surfactant-treated biological fluid sample are provided.
    Type: Application
    Filed: May 20, 2009
    Publication date: March 31, 2011
    Inventors: Ray F. Stewart, Kathryn M. Morton, Aarpm Dickerman-Stewart, Nathan Mak