Patents by Inventor Albert van der Scheer

Albert van der Scheer 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).

  • Process for preparing non-porous, selective membrane layers
    Patent number: 4976856
    Abstract: The invention relates to a process for preparing non-porous, selective membrane layers by contacting a permeable, continuous substrate (e.g. comprising a non-porous, permeable intermediate layer and a microporous support layer) with the glowing zone of a plasma.
    Type: Grant
    Filed: March 13, 1989
    Date of Patent: December 11, 1990
    Assignee: Shell Oil Company
    Inventors: Albert Van Der Scheer, Jan Werner
  • Process for producing dense membranes
    Patent number: 4605526
    Abstract: A process for producing dense membranes comprises allowing a solution comprising a polar polymer and/or a polar prepolymer in a polar solvent which is substantially soluble in a polar liquid to spread out over the surface of the polar liquid and allowing the spread out solution to desolvate. The dense membranes can be applied in supported membranes for use in gas separation processes.
    Type: Grant
    Filed: January 25, 1985
    Date of Patent: August 12, 1986
    Assignee: Shell Oil Company
    Inventors: Marinus J. Reynhout, Albert van der Scheer
  • Composite dense membrane
    Patent number: 4581043
    Abstract: Composite dense membranes are described comprising (1) a dense ultrathin selective film of a silicon-free polymerizate, (2) a dense, highly permeable intermediate layer formed by conventional polymerization fluids, e.g., gases may be selectively separated using such a composite dense membrane and (3) a microporous substrate supporting the plasma polymerizate film and the intermediate layer.
    Type: Grant
    Filed: July 26, 1984
    Date of Patent: April 8, 1986
    Assignee: Shell Oil Company
    Inventor: Albert van der Scheer
  • Method for producing a very thin dense membrane
    Patent number: 4556530
    Abstract: A very thin, dense membrane is produced by preparing a solution of a polymer and/or prepolymer and a substantially water insoluble surface active agent in an organic liquid, allowing the solution to spread spontaneously on the surface of a liquid support substantially consisting of a polar fluid and allowing the solution to desolvate and to react, if a prepolymer is present. The membrane so produced may be supported by a substrate comprising at least one porous layer.
    Type: Grant
    Filed: July 26, 1984
    Date of Patent: December 3, 1985
    Assignee: Shell Oil Company
    Inventors: Albert van der Scheer, Marinus J. Reynhout