Patents by Inventor Hendrikus W. Leenders

Hendrikus W. Leenders 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).

  • Alkaline polymerization of carboxylated polymers
    Patent number: 5015713
    Abstract: Polymers containing acryloyloxy monomers may be prepared by emulsion polymerization at alkaline pH. This permits the use of unlined mild steel reactors to polymerize functional containing monomers.
    Type: Grant
    Filed: April 26, 1989
    Date of Patent: May 14, 1991
    Assignees: Polysar Financial Services S.A., BASF Aktiengesellschaft
    Inventors: Peter R. J. Blanpain, Hendrikus W. Leenders
  • Determination of monomer conversion by headspace analysis
    Patent number: 4670400
    Abstract: Method for determining monomer conversion in the liquid phase by analyzing vapor phase above a polymerization mixture comprising measuring temperature of the vapor phase, analyzing the vapor phase with a gas chromatograph provided with a flame ionization detector to determine relative amount of a certain monomer in the vapor phase, correlating initial amount of the monomer with an intermediate amount of the monomer adjusted by applying a temperature correction, and determining monomer conversion on the basis of an essentially linear relationship of conversion in the liquid phase with relative amount of the monomer in the vapor phase.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: June 2, 1987
    Assignee: The B. F. Goodrich Company
    Inventors: Hendrikus W. Leenders, Derk A. Bril