Patents by Inventor David J. Dobson

David J. Dobson 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).

  • Paper coating methods
    Patent number: 4263344
    Abstract: A method of coating sheet material with a coating composition comprising particulate solid material suspended in a liquid carrier, wherein the coating composition is applied to the sheet material as a foam and subsequently dried, the air content of the foam being such that the viscosity of the coating composition is greater in its unfoamed state than in the foamed state in which the composition is applied.
    Type: Grant
    Filed: April 11, 1977
    Date of Patent: April 21, 1981
    Assignee: Wiggins Teape Limited
    Inventors: Bronislaw Radvan, David J. Dobson