Patents by Inventor Stephen D. Reduker

Stephen D. Reduker 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).

  • Hydrophilic polyurethane composition
    Patent number: 4810582
    Abstract: Water absorptive polyurethane composition, having high mechanical strength, is formed of A. about 25% to about 75% of a hydrophilic polyether polyurethane which is the reaction product of diethylene glycol and a polyoxyethylene glycol having a molecular weight of about 1000 to about 8000 with a polyisocyanate and B. about 75% to about 25% of a hydrophobic polyester polyurethane which is the reaction product of a polyfunctional polyester derived from the condensation of a polyol with a polybasic acid with a polyisocyanate.
    Type: Grant
    Filed: March 18, 1988
    Date of Patent: March 7, 1989
    Assignee: Tyndale Plains-Hunter Ltd.
    Inventors: Francis E. Gould, Ellen K. Morgan, Stephen D. Reduker
  • Hydrophilic polyurethane composition
    Patent number: 4798876
    Abstract: Water absorptive polyurethane composition, having high mechanical strength, is formed of A. about 25% to about 75% of a hydrophilic polyether polyurethane which is the reaction product of diethylene glycol and a polyoxyethylene glycol having a molecular weight of about 1000 to about 8000 with a polyisocyanate and B. about 75% to about 25% of a hydrophobic polyester polyurethane which is the reaction product of a polyfunctional polyester derived from the condensation of a polyol with a polybasic acid with a polyisocyanate.
    Type: Grant
    Filed: November 12, 1985
    Date of Patent: January 17, 1989
    Assignee: Tyndale Plains-Hunter Ltd.
    Inventors: Francis E. Gould, Ellen K. Morgan, Stephen D. Reduker