Patents by Inventor Donald R. Rink

Donald R. Rink 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).

  • Method of cleaning surfaces with CO.sub.2 -neutralized amine compositions
    Patent number: 4135947
    Abstract: Organic coatings or deposits are removed from a surface, such as an oven surface, by applying to the coating an aqueous composition containing a primary or secondary amine neutralized with an amount of carbon dioxide in the composition sufficient to cause the composition to have a pH of 10 or less, subjecting the applied composition to conditions whereby partial pressure of carbon dioxide acting on the composition is less than the partial pressure of carbon dioxide in the composition at the temperature of use, and thereafter mechanically removing the coating. The composition may optionally contain a water-soluble organic solvent or a thickening agent.
    Type: Grant
    Filed: April 22, 1977
    Date of Patent: January 23, 1979
    Assignee: Union Carbide Corporation
    Inventor: Donald R. Rink