Patents by Inventor Bruce G. VAN Leuwen

Bruce G. VAN Leuwen 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).

  • Polyurethane foams containing stannous catechol derivatives
    Patent number: 4011181
    Abstract: Polyurethane foams are prepared from compositions containing, as gel catalysts, a select group of stannous catechol derivatives.
    Type: Grant
    Filed: July 30, 1975
    Date of Patent: March 8, 1977
    Assignee: Olin Corporation
    Inventors: Bruce G. VAN Leuwen, James J. Pitts
  • Hydrophilic polyurethane foam
    Patent number: 4008189
    Abstract: An improvement is disclosed in the preparation of hydrophilic polyurethane foams. The improvement comprises employing, as the polyol reactant used in making the foam, a mixture of selected oxyalkylated polyhydric alcohols. The resulting foam has improved wet strength properties and is particularly useful in cleaning and similar applications.
    Type: Grant
    Filed: November 4, 1975
    Date of Patent: February 15, 1977
    Assignee: Olin Corporation
    Inventors: Bruce G. VAN Leuwen, Clifford J. Maxwell
  • High resilience polyurethane foam stabilized with a silicate-based surfactant composition
    Patent number: 3935133
    Abstract: High resilience polyether polyurethane foam is prepared from a reaction mixture comprising a silicate-based surfactant composition.
    Type: Grant
    Filed: December 23, 1974
    Date of Patent: January 27, 1976
    Assignee: Olin Corporation
    Inventors: Bruce G. VAN Leuwen, Ralph A. Colafati, III
  • High resilience polyurethane foam
    Patent number: 3931066
    Abstract: Selected polyether polyols are used as stabilizers in the production of high resilience polyurethane foam.
    Type: Grant
    Filed: August 8, 1974
    Date of Patent: January 6, 1976
    Assignee: Olin Corporation
    Inventors: John E. Puig, Bruce G. VAN Leuwen