Patents by Inventor Peter F. Lobo

Peter F. Lobo 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).

  • Process for preparing low color polyarylates
    Patent number: 4959449
    Abstract: Polyarylates formed by reacting the diester of a dihydric phenol such as bisphenol-A and at least one aromatic dicarboxylic acid in the presence of an esterification catalyst is provided with improved color by the addition of cobalt during polymerization. The amount of cobalt can be reduced and an additional amount of an ultramarine blue pigment can be added to the reaction mixture to maintain the color improvement.
    Type: Grant
    Filed: May 25, 1989
    Date of Patent: September 25, 1990
    Assignee: Hoechst Celanese Corporation
    Inventors: Adin L. Stautzenberger, Edward E. Quick, Peter F. Lobo