Patents by Inventor Marla S. Crill

Marla S. Crill 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 for dewatering paper
    Patent number: 4795531
    Abstract: A method of enhancing the dewatering of paper during the papermaking process which includes adding a low molecular weight cationic coagulant and then colloidal silica and a high molecular weight flocculant.
    Type: Grant
    Filed: September 22, 1987
    Date of Patent: January 3, 1989
    Assignee: Nalco Chemical Company
    Inventors: Samuel C. Sofia, Kerrie A. Johnson, Marla S. Crill, Martin J. Roop, Steven R. Gotberg, Anthony S. Nigrelli, Laurence S. Hutchinson
  • Starch viscosity control agent using an ethoxylated fatty alcohol
    Patent number: 4021260
    Abstract: An improved starch paste which contains from between 5 to 40% by weight of starch and from 0.01 to 5% by weight based on the weight of the starch of a fatty alcohol which has been reacted with from 1 - 20 moles of ethylene oxide.
    Type: Grant
    Filed: September 16, 1976
    Date of Patent: May 3, 1977
    Assignee: Nalco Chemical Company
    Inventor: Marla S. Crill