Patents by Inventor Paul S. McIntosh

Paul S. McIntosh 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 the production of ketene dimers
    Patent number: 5399774
    Abstract: Production of ketene dimers from fatty acid halides by reaction with tertiary amines whereby the tertiary amine is used both as a reactant and as a solvent/diluent. In the process at least 1.15 moles of tertiary amine is used per mole of fatty acid halide and the process is carried out in the substantial absence of an additional solvent, whereby the produced ketene dimer is obtained by stripping of the tertiary amine followed by separation of formed crystals of tertiary amine hydrogen halide by acid extraction.
    Type: Grant
    Filed: February 18, 1994
    Date of Patent: March 21, 1995
    Assignee: Eka Nobel AB
    Inventor: Paul S. McIntosh