Patents by Inventor Bruce Barner

Bruce Barner 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).

  • Reduced oligomer concentration in high purity polyalkylene glycols
    Publication number: 20070185307
    Abstract: Polyalkylene glycol compositions having reduced low molecular weight oligomers are disclosed. Some compositions, particularly polyethylene glycol compositions, have a number average molecular weight range from about 3000 to about 10,000 g/mol and have a total oligomer concentration of less than about 400 ppm of all oligomers having a molecular weight of less than or equal to 812 g/mol and a total oligomer concentration of less than about 50 ppm of all oligomers having a molecular weight of less than or equal to 240 g/mol. Other polyalkylene compositions, particularly polyethylene glycol compositions, are characterized by a total oligomer concentration of less than about 90 ppm of all oligomers having a molecular weight less than or equal to 460 g/mol and are obtained without further processing to remove oligomers having a molecular weight of less than about 460 g/mol. Methods for making such compositions are also disclosed.
    Type: Application
    Filed: February 3, 2006
    Publication date: August 9, 2007
    Applicant: Dow Global Technologies Inc.
    Inventors: Robert Thompson, Pierre Varineau, Bruce Barner, David Wilson