Patents by Inventor Valerie Sue Adams

Valerie Sue Adams 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).

  • Polyester/polycarbonate blends with reduced yellowness
    Patent number: 6723768
    Abstract: Thermoplastic compositions of polyester/polycarbonate blends have reduced yellowness and improved thermal and melt stability when the polyester is produced with a reduced level of a titanium-containing catalyst in an amount of from about 1 to about 30 ppm elemental titanium, with ppm based on the total weight of the polyester.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: April 20, 2004
    Assignee: Eastman Chemical Company
    Inventors: Valerie Sue Adams, Emmett Dudley Crawford, Michael Eugene Donelson, Douglas Stephens McWilliams
  • Polyester/polycarbonate blends with reduced yellowness
    Publication number: 20040063864
    Abstract: Thermoplastic compositions of polyester/polycarbonate blends have reduced yellowness and improved thermal and melt stability when the polyester is produced with a reduced level of a titanium-containing catalyst in an amount of from about 1 to about 30 ppm elemental titanium, with ppm based on the total weight of the polyester.
    Type: Application
    Filed: September 24, 2003
    Publication date: April 1, 2004
    Inventors: Valerie Sue Adams, Emmett Dudley Crawford, Michael Eugene Donelson, Douglas Stephens McWilliams
  • Polyester/polycarbonate blends with reduced yellowness
    Publication number: 20030187151
    Abstract: Thermoplastic compositions of polyester/polycarbonate blends have reduced yellowness and improved thermal and melt stability when the polyester is produced with a reduced level of a titanium-containing catalyst in an amount of from about 1 to about 30 ppm elemental titanium, with ppm based on the total weight of the polyester.
    Type: Application
    Filed: March 27, 2002
    Publication date: October 2, 2003
    Inventors: Valerie Sue Adams, Emmett Dudley Crawford, Michael Eugene Donelson, Douglas Stephens McWilliams
  • Process for preparing copolyesters of terephthalic acid ethylene glycol and 1 4-cyclohexanedimethanol exhibiting a neutral hue high clarity and increased brightness
    Patent number: 5681918
    Abstract: This invention relates to a three step process for preparing copolyesters exhibiting a neutral hue, high clarity and increased brightness. The process involves reacting terephthalic acid, ethylene glycol, and 1,4-cyclohexanedimethanol in a feed mole ratio of total glycols to dicarboxylic acid of 1.7:1 to 6.0:1, at a temperature of 240.degree. C. to 280.degree. C., and a pressure of 15 psig to 80 psig to form an esterification product; adding a polycondensation catalyst and a toner; and polycondensing the product at a temperature of 260.degree. C. to 290.degree. C. and a reduced pressure to form a high molecular weight copolyester.
    Type: Grant
    Filed: February 20, 1996
    Date of Patent: October 28, 1997
    Assignee: Eastman Chemical Company
    Inventors: Valerie Sue Adams, James Earl Hataway, Kenneth Alan Roberts