Patents by Inventor Sharon Griffith

Sharon Griffith 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).

  • Methods for Making Polyester Resins Having Reduced Frictional Properties
    Publication number: 20070142537
    Abstract: The invention is a method for the late introduction of inert particulate additives via a reactive carrier to achieve a polyester resin that is capable of being formed into low-haze, high-clarity bottles possessing reduced coefficient of friction. The invention is also a polyester resin that includes between about 20 and 200 ppm of an inert particulate additive, such as surface-modified talc or surface-modified calcium carbonate.
    Type: Application
    Filed: February 2, 2007
    Publication date: June 21, 2007
    Inventors: Walter Edwards, Robert Schiavone, Sharon Griffith, Carl Nichols, Tony Moore
  • Polyester Resins for High-Strength Articles
    Publication number: 20070059465
    Abstract: The present invention relates to slow-crystallizing, titanium-catalyzed polyethylene terephthalate resins that are useful for making high-strength, high-clarity bottles that possess improved resistance to stress cracking and thermal creep. The polyethylene terephthalate resins possess improved reheating profiles and are especially useful for making polyester articles that have exceptional clarity, dimensional stability, and thermal stability.
    Type: Application
    Filed: August 21, 2006
    Publication date: March 15, 2007
    Inventors: David Thompson, Carl Nichols, Tony Moore, Sharon Griffith, Billy Humelsine, Robert Schiavone
  • Methods of making titanium-catalyzed polyester resins
    Publication number: 20050261462
    Abstract: The present invention relates to methods of making titanium-catalyzed, polyethylene terephthalate resins, preforms, and bottles having reduced comonomer substitution.
    Type: Application
    Filed: May 20, 2004
    Publication date: November 24, 2005
    Inventors: Carl Nichols, Tony Moore, David Thomson, Sharon Griffith, Billy Mack, Robert Schiavone
  • Polyester preforms useful for enhanced heat-set bottles
    Publication number: 20050153086
    Abstract: The present invention relates to slow-crystallizing polyethylene terephthalate resins that possess a significantly higher heating crystallization exotherm peak temperature (TCH) as compared with those of conventional antimony-catalyzed polyethylene terephthalate resins. The polyethylene terephthalate preforms of the present invention, which possess improved reheating profiles, are especially useful for making polyester bottles that have exceptional clarity and that retain acceptable dimensional stability upon being hot-filled with product at temperatures between about 195° F. and 205° F.
    Type: Application
    Filed: November 24, 2004
    Publication date: July 14, 2005
    Inventors: Tony Moore, David Thompson, Sharon Griffith, Carl Nichols, Billy Humelsine, Robert Schiavone