Patents by Inventor James N. Wells

James N. Wells 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).

  • Extension of polyurethane hydrogel cure time
    Patent number: 4383079
    Abstract: The cure time of polyurethane prepolymer curable with water to form polyurethane hydrogel is prolonged by the addition to the water of certain micelle-forming adducts which substantially extend the cure time.
    Type: Grant
    Filed: April 9, 1981
    Date of Patent: May 10, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Alton J. Gasper, James N. Wells
  • Poly(urethane-isocyanurate) foams containing hollow glass spheres
    Patent number: 3993608
    Abstract: Novel poly(urethane-isocyanurate) foams and their preparation are described. These foams contain hollow glass spheres and are tough, non-friable and heat stable. Energy absorbing panels are also provided.
    Type: Grant
    Filed: June 27, 1974
    Date of Patent: November 23, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: James N. Wells