Patents by Inventor DWANLEEN E. SHEN

DWANLEEN E. SHEN 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: 20240352307
    Abstract: In one aspect, the disclosure relates to anodically coloring organic electrochromic materials as discrete chromophores. The chromophores are UV absorbing in the neutral state and upon oxidation form vibrantly absorbing, colored radical cation and dication species. In an aspect, the disclosed materials include UV absorbing discrete chromophores based on a 2-thiomethyl-dioxythiophene coupled to a triphenylamine or carbazole unit. In another aspect, consideration of steric effects and tuning substituent pattern can lead to new cation radicals that are highly saturated in the colored state and have increased color vibrancy. The chromophores and materials containing the same can be used in electrochromic color-to-clear switching devices including, but not limited to, windows, displays, signs, goggles, glasses, and the like.
    Type: Application
    Filed: April 9, 2024
    Publication date: October 24, 2024
    Inventors: Justine Sina Wagner, Anna M. Osterholm, Dwanleen E. Shen, John Roberts Reynolds
  • Patent number: 11384198
    Abstract: Embodiments of the invention are directed to yellow/orange-to-transmissive conjugated polymers, a method to prepare the yellow/orange conjugated polymers, and an electrochromic and/or electroluminescent device comprising the neutral state yellow/orange conjugated polymers as one of a plurality of primary subtractive colored conjugated polymers. The yellow/orange conjugated polymers show enhanced redox stability and can have a (D2Arz)n structure with a dioxyheterocycle repeating unit or a (DArz)n structure with a dioxythiophene monomer that has at least one substituted carbon ? to an oxygen of the monomer; and where the one to three Ar groups have at least one carbon ? to the carbon attached to a D unit substituted that has at least 5 atoms in the substituent. The yellow/orange conjugated polymers show enhanced redox stability. The yellow/orange conjugated polymers are prepared by cross-condensation reactions.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: July 12, 2022
    Assignee: GEORGIA TECH RESEARCH CORPORATION
    Inventors: John Robert Reynolds, Kangli Cao, Anna M. Osterholm, Dwanleen E. Shen, Dylan Thomas Christiansen
  • Publication number: 20190218338
    Abstract: Embodiments of the invention are directed to yellow/orange-to-transmissive conjugated polymers, a method to prepare the yellow/orange conjugated polymers, and an electrochromic and/or electroluminescent device comprising the neutral state yellow/orange conjugated polymers as one of a plurality of primary subtractive colored conjugated polymers. The yellow/orange conjugated polymers show enhanced redox stability and can have a (D2Arz)n structure with a dioxyheterocycle repeating unit or a (DArz)n structure with a dioxythiophene monomer that has at least one substituted carbon ? to an oxygen of the monomer; and where the one to three Ar groups have at least one carbon ? to the carbon attached to a D unit substituted that has at least 5 atoms in the substituent. The yellow/orange conjugated polymers show enhanced redox stability. The yellow/orange conjugated polymers are prepared by cross-condensation reactions.
    Type: Application
    Filed: August 22, 2017
    Publication date: July 18, 2019
    Inventors: JOHN ROBERT REYNOLDS, KANGLI CAO, ANNA M. OSTERHOLM, DWANLEEN E. SHEN, DYLAN THOMAS CHRISTIANSEN