Patents by Inventor Bennie J. Lewis

Bennie J. Lewis 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 depolymerization of acrylic acid polymers
    Patent number: 4293347
    Abstract: A method of removing acrylic acid polymer from processing vessels, e.g., distillation towers, which comprises contacting said polymer with a dialkyl phthalate in vapor or liquid form at elevated temperatures. This procedure dissolves and depolymerizes the polymer and removes it from the vessel.
    Type: Grant
    Filed: January 21, 1980
    Date of Patent: October 6, 1981
    Assignee: The Dow Chemical Company
    Inventors: Elliot M. Haschke, Bennie J. Lewis