Patents by Inventor Robert W. Walters

Robert W. Walters 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: 20040185268
    Abstract: Described are photochromic articles that include a substrate and at least one photochromic material adapted to change from an unactivated state to an activated state by exposure to radiation substantially in a wavelength range from 380 to 410 nanometers (nm) when measured over a wavelength range of from 380 to 700 nm. The photochromic articles demonstrate a photochromic response when activated behind an ultraviolet blocking transparency such as an automotive windshield. For example, the photochromic articles retain at least 12 percent of the activation measured as change in optical density or delta OD under outdoor simulating conditions in the Outdoor Test when tested under conditions simulating an eyeglass wearer behind an automotive windshield in the Behind the Windshield Test. Methods for producing the aforedescribed photochromic articles are also described.
    Type: Application
    Filed: March 20, 2003
    Publication date: September 23, 2004
    Inventors: Anil Kumar, Michael S. Misura, Robert W. Walters, Barry Van Germert, Anu Chopra, Clara E. Nelson
  • Publication number: 20040121184
    Abstract: An organic light emitting device is provided.
    Type: Application
    Filed: August 18, 2003
    Publication date: June 24, 2004
    Inventors: Mark E. Thompson, Peter Djurovich, Raymond Kwong, Yeh-Jiun Tung, David B. Knowles, Jason Brooks, Robert W. Walters
  • Publication number: 20040091738
    Abstract: Emissive materials are provided having the following structures: 1 2
    Type: Application
    Filed: November 8, 2002
    Publication date: May 13, 2004
    Inventors: Jui-Yi Psai, Robert W. Walters, Michael Barone
  • Publication number: 20040086742
    Abstract: An organic light emitting device is provided. The device has an anode, a cathode, and an emissive layer disposed between the anode and the cathode.
    Type: Application
    Filed: November 6, 2002
    Publication date: May 6, 2004
    Inventors: Bin Ma, Robert W. Walters, David B. knowles, Raymond Kwong, Yeh-Jiun Tung, Peter I. Djurovich, Mark E. Thompson
  • Patent number: 6602603
    Abstract: Described are articles having a photochromic poly(meth)acrylic coating The coatings exhibit a Fischer microhardness of from 50 to 150 Newtons per mm2 and improved photochromic performance properties, i.e., the formation of darker activated colors and faster rates of photochromic activation and fade when irradiated with ultraviolet light.
    Type: Grant
    Filed: September 4, 2001
    Date of Patent: August 5, 2003
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Cletus N. Welch, Robert W. Walters, David T. McKeough, Eric M. King
  • Publication number: 20030141490
    Abstract: Described is a photochromic polymer composition including the reaction product of at least one polymerizable photochromic material and at least one other copolymerizable material having a glass transition temperature of less than 23° C. upon polymerization. The photochromic polymer composition is adapted to provide an increased Fade Half Life in the Photochromic Polymer Performance Test as compared to the same photochromic compound used in the reaction product, but free of polymerizable groups. Also described are photochromic articles including the photochromic polymer composition.
    Type: Application
    Filed: December 6, 2002
    Publication date: July 31, 2003
    Inventors: Robert W. Walters, Anil Kumar, Forrest R. Blackburn, Kevin J. Stewart
  • Publication number: 20030142267
    Abstract: Described are contact lenses having photochromic materials within the central or pupillary area of the lens and methods for manufacturing such lenses. In one method, a photochromic amount of at least one photochromic material is added to the pupillary region of a casting mold containing a polymerizable monomer that can be at least partially cured before and/or after the addition. Another method involves providing an amount of polymerizable photochromic monomer for the pupillary region and an amount of polymerizable non-photochromic monomer for the remainder of the contact lens in a casting mold. The photochromic and non-photochromic monomers can differ by their degree of polymerization, viscosity and/or density.
    Type: Application
    Filed: December 10, 2002
    Publication date: July 31, 2003
    Inventors: Barry Van Gemert, Anil Kumar, Frank P. Mallak, Robert W. Walters
  • Patent number: 6555028
    Abstract: Described are polymeric matrix compatibilized naphthopyran compounds, examples of which are certain 2H-naphtho[1,2-b]pyrans, 3H-naphtho[2,1-b]pyrans and indeno[2,1-f]naphtho[1,2-b]pyrans each having at least one substituent containing terminal and/or pendant groups selected from hydroxyl, carboxyl, sulfo, sulfono, (meth)acryloxy, 2-(methacryloxy)ethylcarbamyl, epoxy or a mixture thereof. Specific substituents are also present on the naphtho, indeno and/or pyrano portions of the compounds. These compounds may be represented by the following graphic formulae: Also described are various substrates that contain or that are coated with such compounds. Optically clear articles such as contact lenses or other plastic transparencies that incorporate the novel naphthopyran compounds or combinations thereof with complementary photochromic compounds, are also described.
    Type: Grant
    Filed: April 6, 2001
    Date of Patent: April 29, 2003
    Assignee: Transitions Optical, Inc.
    Inventors: Robert W. Walters, Barry Van Gemert
  • Patent number: 6436525
    Abstract: Described are articles having a polyanhydride photochromic coating. The coatings exhibit a Fischer microhardness of from 50 to 130 Newtons per mm2 and desirable photochromic properties, i.e., the formation of darker activated colors and faster rates of photochromic activation and fade when irradiated with ultraviolet light. Also described are polyanhydride photochromic articles.
    Type: Grant
    Filed: December 11, 1998
    Date of Patent: August 20, 2002
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Cletus N. Welch, Robert W. Walters, Shanti Swarup
  • Publication number: 20020076549
    Abstract: Described are articles having a photochromic poly(meth)acrylic coating The coatings exhibit a Fischer microhardness of from 50 to 150 Newtons per mm2 and improved photochromic performance properties, i.e., the formation of darker activated colors and faster rates of photochromic activation and fade when irradiated with ultraviolet light.
    Type: Application
    Filed: September 4, 2001
    Publication date: June 20, 2002
    Inventors: Cletus N. Welch, Robert W. Walters, David T. McKeough, Eric M. King
  • Publication number: 20010025948
    Abstract: Described are polymeric matrix compatibilized naphthopyran compounds, examples of which are certain 2H-naphtho[1,2-b]pyrans, 3H-naphtho[2,1-b]pyrans and indeno[2,1-f]naphtho[1,2-b]pyrans each having at least one substituent containing terminal and/or pendant groups selected from hydroxyl, carboxyl, sulfo, sulfono, (meth)acryloxy, 2-(methacryloxy)ethylcarbamyl, epoxy or a mixture thereof. Specific substituents are also present on the naphtho, indeno and/or pyrano portions of the compounds.
    Type: Application
    Filed: April 6, 2001
    Publication date: October 4, 2001
    Inventors: Robert W. Walters, Barry Van Gemert
  • Patent number: 6268055
    Abstract: Described are photochromic epoxy resin coatings that meet commercially acceptable “cosmetic” standards for optical coatings. Also described are articles having such coatings. The coatings exhibit a Fischer microhardness of from 50 to 150 Newtons per mm2 and desirable photochromic properties, i.e., the formation of darker activated colors and faster rates of photochromic activation and fade when irradiated with ultraviolet light.
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: July 31, 2001
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Robert W. Walters, Cletus N. Welch, John W. Burgman, Debra L. Singer, Shanti Swarup
  • Patent number: 6187444
    Abstract: Described are photochromic polyurethane coatings that meet commercially acceptable “cosmetic” standards for optical coatings. Also described are articles having such coatings. The coatings exhibit a Fischer microhardness of from 50 to 150 Newtons per mm2 and improved photochromic properties, i.e., the formation of darker activated colors and faster rates of photochromic activation and fade when irradiated with ultraviolet light.
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: February 13, 2001
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Robert J. Bowles, III, Nancyanne Gruchacz, Shanti Swarup, Jeanine A. Conklin, Robert W. Walters, Robin Hunt
  • Patent number: 6150430
    Abstract: Described is a process for producing an adherent organic polymeric layer on organic polymeric substrates following the steps of (a) treating the surface of the polymeric substrate to provide reactive groups; (b) applying to the treated surface a polymerizable composition of a surface modifying amount of an organofunctional silane, a catalyzing amount of material which generates acid upon exposure to actinic radiation, and a solvating amount of solvent; (c) exposing the coated surface to an adhesion improving amount of actinic radiation; and (d) applying and curing a photochromic or non-photochromic polymer-forming composition on the coated surface. Also described are articles produced by the process.
    Type: Grant
    Filed: July 6, 1999
    Date of Patent: November 21, 2000
    Assignee: Transitions Optical, Inc.
    Inventors: Robert W. Walters, Kevin J. Stewart
  • Patent number: 6025026
    Abstract: Described is a process for producing adherent layer(s) on organic polymeric substrates following the steps of (a) treating the surface of the polymeric substrate to provide reactive groups; (b) applying to the surface a polymerizable composition of organic anhydrides, isocyanates and/or a mixture thereof that is substantially free of organosiloxanes; and (c) curing the polymerizable coating. Further steps include applying an additional layer which is substantially free of organosiloxanes and that may or may not contain the polymerizable composition of the present invention. Also described are products produced by the process that may be transparent, tinted, tinted and polarized or photochromic.
    Type: Grant
    Filed: June 5, 1998
    Date of Patent: February 15, 2000
    Assignee: Transitions Optical, Inc.
    Inventors: Robert A. Smith, Robert W. Walters, Kevin J. Stewart, Michael S. Misura
  • Patent number: 4211153
    Abstract: The cartoner utilizes a rotary feeder to pick-up a carton blank on a dead stop from a hopper; to break the carton on itself on a breaking plate during movement in an arcuate path from the hopper; and to deposit the blank on a dead stop on a conveyor. The rotary feeder continuously rotates and uses various means to stop the motion of the carton blank during travel from the hopper to the conveyor.
    Type: Grant
    Filed: August 15, 1978
    Date of Patent: July 8, 1980
    Assignee: Container Equipment Corporation
    Inventors: Robert W. Walters, James Nylander