Patents by Inventor Kenneth William Shelton

Kenneth William Shelton 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).

  • Plaster compositions containing oxo-polycarboxylic acids as a set retarder
    Patent number: 4102701
    Abstract: Oxo-polycarboxylic acids act as set control agents, preferably as set retarders for plasters. Examples of usable acids are 2,2,6,6-tetra(.beta.-carboxyethyl)cyclohexanone, 2,2-di(.beta.-carboxyethyl)-3,5,5-trimethylcyclohexanone or 3-acetyl-3(.beta.-carboxyethyl)-pimelic acid. Also the salts of these acids are usable. The set control agents are added to the plaster in amounts of 5 to 5000 ppm.
    Type: Grant
    Filed: March 17, 1976
    Date of Patent: July 25, 1978
    Assignee: Ciba-Geigy Corporation
    Inventors: Colin Dennis Campbell, Michael Anthony Finan, Kenneth William Shelton