Patents by Inventor Gurunath CS

Gurunath CS 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).

  • Purified poly(phenylene ether), and poly(phenylene ether) composition and article
    Patent number: 10767010
    Abstract: Purification of a poly(phenylene ether) includes contacting a liquid feed solution with a hydrated acidic clay adsorbent under conditions effective to provide a liquid effluent solution. The liquid feed solution includes a poly(phenylene ether), an organic acid impurity, and an amine impurity. The weight average molecular weight of the poly(phenylene ether) of the liquid effluent solution is within 1 percent of the weight average molecular weight of the poly(phenylene ether) of the feed solution, and the concentration of the amine impurity and the organic acid impurity of the liquid effluent solution is reduced by at least 40 percent relative to the concentration of the each impurity in the feed solution. Compositions and articles comprising a purified poly(phenylene ether) are also described.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: September 8, 2020
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Gurunath CS, Arun Kumar, Kalsang Tharpa, Jinto Jose
  • PURIFIED POLY(PHENYLENE ETHER), AND POLY(PHENYLENE ETHER) COMPOSITION AND ARTICLE
    Publication number: 20190292316
    Abstract: Purification of a poly(phenylene ether) includes contacting a liquid feed solution with a hydrated acidic clay adsorbent under conditions effective to provide a liquid effluent solution. The liquid feed solution includes a poly(phenylene ether), an organic acid impurity, and an amine impurity. The weight average molecular weight of the poly(phenylene ether) of the liquid effluent solution is within 1 percent of the weight average molecular weight of the poly(phenylene ether) of the feed solution, and the concentration of the amine impurity and the organic acid impurity of the liquid effluent solution is reduced by at least 40 percent relative to the concentration of the each impurity in the feed solution. Compositions and articles comprising a purified poly(phenylene ether) are also described.
    Type: Application
    Filed: March 15, 2019
    Publication date: September 26, 2019
    Inventors: Gurunath CS, Arun Kumar, Kalsang Tharpa, Jinto Jose