Patents by Inventor Marinus Van Zanten

Marinus Van Zanten 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).

  • Degradation of a viscous microbial polysaccharide formulation
    Patent number: 4754809
    Abstract: A process for the degradation with acid of a viscous microbial polysaccharide formulation which is applied in oil and/or gas reservoir operations, wherein the polysaccharide formulation contains an amount of a salt or a salt mixture which is sufficient to adjust the transition temperature of the polysaccharide such that it is close to the reservoir operating temperature. A process for the preparation of an acid degradable polysaccharide formulation and a polysaccharide formulation.
    Type: Grant
    Filed: April 10, 1987
    Date of Patent: July 5, 1988
    Assignee: Shell Oil Company
    Inventors: Marinus van Zanten, Jeffrey B. Pedley, Phillip L. Sturla
  • Method of pretreating an underground formation for silicon polyhalide consolidation
    Patent number: 4372385
    Abstract: The formation is consolidated by means of a silicon halide compound that reacts with water present on the walls of the formation pore space thereby forming silicon dioxide that bonds the formation grains together. The bonding strength is increased by a pretreatment of the formation grains with an acid in liquid or gaseous form.
    Type: Grant
    Filed: May 14, 1981
    Date of Patent: February 8, 1983
    Assignee: Shell Oil Company
    Inventors: David R. Davies, Edwin A. Richardson, Marinus Van Zanten