Patents by Inventor Ann M. Burnell

Ann M. Burnell 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).

  • Use of polytetrafluoroethylene resins as a nucleating agent for foam molded thermoplastics
    Patent number: 5314925
    Abstract: A process for producing structural aromatic polycarbonate thermoplastic foam is provided which involves gas expansion of a melted aromatic polycarbonate thermoplastic resin composition containing an amount of a polytetrafluoroethylene nucleating agent. The thermoplastic resin compositions provided exhibit an improved uniformity of cell structure in the resultant structural thermoplastic foam as a result of the incorporation of the polytetrafluoroethylene nucleating agent. The process and compositions are useful in the production of structural thermoplastic foam articles.
    Type: Grant
    Filed: December 3, 1992
    Date of Patent: May 24, 1994
    Assignee: General Electric Company
    Inventors: Ann M. Burnell, Albin P. Berzinis, Timothy M. Conroy, Kim G. Balfour
  • Blowing agent concentrate and compositions and article prepared therefrom
    Patent number: 5272182
    Abstract: The present invention includes an improved blowing agent concentrate, comprising:(a) a vinyl aromatic polymer;(b) a preformed blend of a styrene/diene block copolymer and a hydrocarbon rubber extending oil; and(c) at least one blowing agent.The blowing agent concentrate is utilized to prepare foamable materials based on a variety of thermoplastic organic polymers. The foamable materials can in turn be molded into a variety of thermoplastic structures.
    Type: Grant
    Filed: December 3, 1992
    Date of Patent: December 21, 1993
    Assignee: General Electric Company
    Inventor: Ann M. Burnell