Patents by Inventor Robert K. Prud'homme

Robert K. Prud'homme 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 characterizing the molecular weight and molecular weight distribution of ultra-high molecular weight water soluble polymers
    Patent number: 4629566
    Abstract: The molecular weight and molecular weight distribution of diverse ultra-high molecular weight water soluble polymers is rapidly determined based on apparent size by passage of extremely dilute samples of the polymer (1-250 ppm) through a column of nonporous packing whereby separation into molecular weight (apparent size) fractions is obtained predominantly based on flow (i.e., hydrodynamic chromatography). Detection of the extremely dilute sample polymer is accomplished, e.g., by tagging the polymer with a fluorescent agent and using a flow-through fluorometer detector. The molecular weight characterization of the polymers is determined independent or less dependent of the composition of the polymer by analyzing the sample in its nonionized form.
    Type: Grant
    Filed: May 24, 1985
    Date of Patent: December 16, 1986
    Assignee: The Dow Chemical Company
    Inventors: Robert K. Prud'homme, Frederick W. Stanley, Jr., Martin W. Langhorst
  • Method for characterizing the molecular weight and molecular weight distribution of ultra-high molecular weight water soluble polymers
    Patent number: 4532043
    Abstract: The molecular weight and molecular weight distribution of diverse ultra-high molecular weight water soluble polymers is rapidly determined based on apparent size by passage of extremely dilute samples of the polymer (1-250 ppm) through a column of nonporous packing whereby separation into molecular weight (apparent size) fractions is obtained predominantly based on flow (i.e., hydrodynamic chromatography). Detection of the extremely dilute sample polymer is accomplished, e.g., by tagging the polymer with a fluorescent agent and using a flow-through fluorometer detector. The molecular weight characterization of the polymers is determined independent or less dependent of the composition of the polymer by analyzing the sample in its nonionized form.
    Type: Grant
    Filed: August 15, 1983
    Date of Patent: July 30, 1985
    Assignee: The Dow Chemical Company
    Inventors: Robert K. Prud'homme, Frederick W. Stanley, Jr., Martin A. Langhorst