Patents by Inventor Fang Christine Chen

Fang Christine Chen 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).

  • Production of low-particulate bisphenol and use thereof in the manufacturing of polycarbonate
    Patent number: 6545187
    Abstract: Low-particulate dihydric aromatic compounds such as bisphenol-A that can be used in the synthesis of low-particulate polycarbonates are prepared by introducing into a desorber column containing a non-aggregate packing material an adduct of bisphenol and phenol and optionally a stripping gas. The column is maintained at an operating temperature that is sufficiently high and an operating pressure that is sufficiently low such that the adduct is distilled. The stream of phenol and the stripping gas is recovered from the top of the column. A second stream containing bisphenol that is substantially free of added particulate matter is recovered from the bottom of the column. This purified stream of bisphenol-A can further be used in a method of producing optical-grade polycarbonate.
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: April 8, 2003
    Assignee: General Electric Company
    Inventors: Gaylord Michael Kissinger, Fang Christine Chen, James Cristopher Blubaugh, Darlene Hope Nance, Edward Brittain Stokes, Juan Rodriguez Ordonez, Jose M. Quintana
  • PRODUCTION OF LOW-PARTICULATE BISPHENOL AND USE THEREOF IN THE MANUFACTURING OF POLYCARBONATE
    Publication number: 20030055296
    Abstract: Low-particulate dihydric aromatic compounds such as bisphenol-A that can be used in the synthesis of low-particulate polycarbonates are prepared by introducing into a desorber column containing a non-aggregate packing material an adduct of bisphenol and phenol and optionally a stripping gas. The column is maintained at an operating temperature that is sufficiently high and an operating pressure that is sufficiently low such that the adduct is distilled. The stream of phenol and the stripping gas is recovered from the top of the column. A second stream containing bisphenol that is substantially free of added particulate matter is recovered from the bottom of the column. This purified stream of bisphenol-A can further be used in a method of producing optical-grade polycarbonate.
    Type: Application
    Filed: September 19, 2001
    Publication date: March 20, 2003
    Inventors: Gaylord Michael Kissinger, Fang Christine Chen, James Cristopher Blubaugh, Darlene Hope Nance, Edward Brittain Stokes, Juan Rodriguez Ordonez, Jose M. Quintana