Patents by Inventor Kokkuvayil V Radhakrishnan

Kokkuvayil V Radhakrishnan 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).

  • 2H-chromenes annelated at C-Cand methods of making and using thereof
    Patent number: 8217188
    Abstract: Described herein are C5-C6 annelated naphthopyrans that possess at least one electron-withdrawing group. The compounds possess desirable properties such as increased fading kinetics. Also described herein are new methods for synthesizing 2H-chromenes annelated at C5-C6. The methods involve less stringent reaction conditions as well as provide increased reaction yields. The methods permit the synthesis of a wide variety of substituted naphthopyrans that can be temperature sensitive, which was not possible with previous synthetic routes.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: July 10, 2012
    Assignee: Corning Incorporated
    Inventors: Suresh Das, Bruno Dufour, Mangalam S Nair, Kokkuvayil V Radhakrishnan
  • 2H-CHROMENES ANNELATED AT C5-C6 AND METHODS OF MAKING AND USING THEREOF
    Publication number: 20100056810
    Abstract: Described herein are C5-C6 annelated naphthopyrans that possess at least one electron-withdrawing group. The compounds possess desirable properties such as increased fading kinetics. Also described herein are new methods for synthesizing 2H-chromenes annelated at C5-C6. The methods involve less stringent reaction conditions as well as provide increased reaction yields. The methods permit the synthesis of a wide variety of substituted naphthopyrans that can be temperature sensitive, which was not possible with previous synthetic routes.
    Type: Application
    Filed: August 4, 2009
    Publication date: March 4, 2010
    Inventors: Suresh Das, Bruno Dufour, Mangalam S Nair, Kokkuvayil V. Radhakrishnan