Patents by Inventor Robert G. Riddell

Robert G. Riddell 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).

  • Cast coated paper and its production and compositions for it
    Patent number: 4048380
    Abstract: Cast coating compositions, processes of using them and cast coated products are described. The compositions comprise pigment and binder, and the binder includes a polymer which has Tg from 0.degree. to 45.degree. C, Tg-Tf from 5.degree. to 25.degree. C and which is in the form of a latex having an average particle size of less than 0.5 microns.
    Type: Grant
    Filed: January 26, 1976
    Date of Patent: September 13, 1977
    Assignee: Star Paper Limited
    Inventors: Rene C. Blakey, Robert G. Riddell, John Whittaker, John A. Wilson