Patents Assigned to Patrick James. Crehan
  • Pectin and related carbohydrates for the preparation of polyurethane foams
    Patent number: 4520139
    Abstract: Gel forming polysaccharides such as pectin react with polyisocyanates to form useful polyurethane foams.
    Type: Grant
    Filed: July 26, 1984
    Date of Patent: May 28, 1985
    Assignees: Patrick James Crehan, Richard J. Fricke
    Inventor: Richard B. Kennedy
  • Polyurethane foams and processes for preparation
    Patent number: 4417998
    Abstract: Polyurethane foams which may be rendered flame resistant by the addition of flame retardants are produced by reaction between a carbohydrate, a polyisocyanate and water in the presence of a suitable surfactant and polyurethane forming catalyst.
    Type: Grant
    Filed: May 20, 1983
    Date of Patent: November 29, 1983
    Assignees: Patrick James Crehan, Richard J. Fricke
    Inventor: Richard B. Kennedy
  • Polyurethane foams and processes for preparation
    Patent number: 4400475
    Abstract: Polyurethane foams which may be rendered flame resistant by the addition of flame retardants are produced by reaction between a carbohydrate, a polyisocyanate and water in the presence of a suitable surfactant and polyurethane forming catalyst.
    Type: Grant
    Filed: November 23, 1982
    Date of Patent: August 23, 1983
    Assignees: Patrick James Crehan, Richard J. Fricke
    Inventor: Richard B. Kennedy
  • Composition and a method for controlling reaction pressures during the foaming process resulting in an easily flame retarded foam-in place insulation
    Patent number: 4291129
    Abstract: A low reactive pressure flame-retardant polyurethane foam made by reacting together a polymeric isocyanate, a polyol, an aqueous solution of a carbohydrate, calcium acid phosphate, sodium aluminum sulfate, sodium bicarbonate, and a flame retardant. A blowing agent may be present.
    Type: Grant
    Filed: June 25, 1980
    Date of Patent: September 22, 1981
    Assignees: Patrick James. Crehan, Richard J. Fricke
    Inventor: Richard B. Kennedy