Patents by Inventor Per G. Batelson

Per G. Batelson 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).

  • Papermaking and products made thereby
    Patent number: 4388150
    Abstract: In making paper from an aqueous papermaking stock a binder comprising colloidal silicic acid and cationic starch is added to the stock for improving the paper or the retention of the stock components, or is added to the white water for reducing the pollution problems or recovering values from the white water.The cationic starch of the binder has a degree of substitution of not less than 0.01, and the weight ratio of cationic starch to SiO.sub.2 is between 1:1 and 25:1.
    Type: Grant
    Filed: February 26, 1981
    Date of Patent: June 14, 1983
    Assignee: Eka Aktiebolag
    Inventors: Olof Sunden, Per G. Batelson, Hans E. Johansson, Hans M. Larsson, Per J. Svending
  • Papermaking
    Patent number: 4385961
    Abstract: A papermaking process in which an aqueous papermaking stock containing a cellulosic pulp is formed and dried. The stock includes a binder comprising colloidal silicic acid, and cationic starch which is added to the stock before the sheet is formed. The manner of addition involves first adding and intermixing in the stock a portion of the colloidal silicic acid and then the cationic starch and, after an agglomerate has formed, adding and intermixing the remainder of the colloidal silicic acid prior to the formation of the sheet. The method results in improved sheet properties and improved retention of filler and fines on the wire.
    Type: Grant
    Filed: February 26, 1981
    Date of Patent: May 31, 1983
    Assignee: EKA Aktiebolag
    Inventors: Per J. Svending, Per G. Batelson, Hans E. Johansson, Hans M. Larsson