Patents by Inventor Chelsea SCHMIDT

Chelsea SCHMIDT 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).

  • METHOD FOR THE MANUFACTURE OF POLYCARBONATE
    Publication number: 20230348668
    Abstract: The present invention relates to a method for the manufacture of a (co)polycarbonate comprising reacting tetrabromo bisphenol A and optionally one or more bisphenol comonomer(s) with phosgene wherein the tetrabromo bisphenol A contains an amount of tetrabromo bisphenol A dimer of at most 3.0 wt.% based on the weight of the tetrabromo bisphenol A, determined after heat treating the tetrabromo bisphenol A at a temperature of 260° C. for a period of 15 minutes.
    Type: Application
    Filed: February 9, 2021
    Publication date: November 2, 2023
    Inventors: Shivakumar Konda, Chelsea Schmidt, Indira Jyothi Polasa, Jordi Calveras, Thomas Paul Kanjirathadathil
  • Polycarbonate copolymers, articles formed therefrom, and methods of manufacture
    Patent number: 11001709
    Abstract: A polycarbonate copolymer contains aromatic carbonate units; optionally siloxane units; and resorcinol arylate ester units. The resorcinol arylate ester units of the polycarbonate copolymer are derived from a resorcinol composition having a hydroquinone content of 50 to 1200 parts per million, a catechol content of 5 to 29 parts per million, and a phenol content of 0 to 2400, each as determined by high performance liquid chromatography, and further comprising an acid stabilizer.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: May 11, 2021
    Assignee: SHPP GLOBAL TECHNOLOGIES B.V.
    Inventors: Christopher Luke Hein, Rahul Patil, Bing Zhou, Guangxin Lin, Chelsea Schmidt, David Zoller, Shuailei Ma, Chester Hassman
  • POLYCARBONATE COPOLYMERS, ARTICLES FORMED THEREFROM, AND METHODS OF MANUFACTURE
    Publication number: 20200385569
    Abstract: A polycarbonate copolymer comprises aromatic carbonate units; optionally siloxane units; and resorcinol arylate ester units derived from a resorcinol composition having a hydroquinone content of 50 to 1200 parts per million, a catechol content of 5 to 29 parts per million, and a phenol content of 0 to 2400, each as determined by high performance liquid chromatography, and further comprising an acid stabilizer.
    Type: Application
    Filed: May 5, 2017
    Publication date: December 10, 2020
    Inventors: Christopher Luke HEIN, Rahul PATIL, Bing ZHOU, Guangxin LIN, Chelsea SCHMIDT, David ZOLLER, Shuailei MA, Chester HASSMAN