Patents by Inventor Vitawat Lahsangah

Vitawat Lahsangah 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).

  • Photochromic optical article having allophanate protective coating and process for making same
    Patent number: 9690021
    Abstract: A photochromic optical article is provided, which includes: an optical substrate; a photochromic layer over a surface of the optical substrate, wherein the photochromic layer includes a photochromic compound; and a protective layer over the photochromic layer, wherein the protective layer includes a matrix that includes residues of an ethylenically unsaturated radically polymerizable material that includes at least one allophanate group. A method of forming the photochromic optical article is also provided.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: June 27, 2017
    Assignee: Transitions Optical, Inc.
    Inventors: Joseph David Turpen, Cynthia Kutchko, Glen Todd Owens, Vitawat Lahsangah, Jerry L. Koenig, II
  • PHOTOCHROMIC OPTICAL ARTICLE HAVING ALLOPHANATE PROTECTIVE COATING AND PROCESS FOR MAKING SAME
    Publication number: 20160238758
    Abstract: A photochromic optical article is provided, which includes: an optical substrate; a photochromic layer over a surface of the optical substrate, wherein the photochromic layer includes a photochromic compound; and a protective layer over the photochromic layer, wherein the protective layer includes a matrix that includes residues of an ethylenically unsaturated radically polymerizable material that includes at least one allophanate group. A method of forming the photochromic optical article is also provided.
    Type: Application
    Filed: October 3, 2014
    Publication date: August 18, 2016
    Inventors: Joseph David Turpen, Cynthia Kutchko, Glen Todd Owens, Vitawat Lahsangah, Jerry L. Koenig, II
  • VISION ENHANCING OPTICAL ARTICLES
    Publication number: 20100232003
    Abstract: The invention provides an optical article including a substrate; and a colorant composition connected to at least a portion of the substrate. The colorant composition is a fixed-tint colorant; and a photochromic material. The article exhibits a passive state and an activated state, such that the article can switch from the passive state to the activated state in response to at least actinic radiation and to revert back to the passive state in response to thermal energy. The passive state is characterized by a transmittance ranging from greater than 30% to 70% across a wavelength range of from 460 nanometers to 500 nanometers.
    Type: Application
    Filed: March 11, 2010
    Publication date: September 16, 2010
    Applicant: TRANSITIONS OPTICAL, INC.
    Inventors: Christopher J. Baldy, Vitawat Lahsangah, Grady M. Lenski, Joseph D. Turpen