Patents by Inventor Paul James L.

Paul James L. 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).

  • Recovery of acrylic acid and/or ethyl acrylate from black acid
    Patent number: 5145989
    Abstract: Black acid or the sulfuric acid residue obtained in the manufacture of ethyl acrylate by reaction of ethylene and acrylic acid in the presence of sulfuric acid is heated and distilled in the presence of a solvent for recovery of acrylic acid and ethyl acrylate.
    Type: Grant
    Filed: July 14, 1987
    Date of Patent: September 8, 1992
    Assignee: Hoechst Celanese Corporation
    Inventors: Edward F. Dougherty, Paul James L.