Patents by Inventor J. Richard Stonehouse

J. Richard Stonehouse 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).

  • Cross-linking thermoplastic polyurethane
    Patent number: 6258310
    Abstract: The invention comprises modifying a preformed thermoplastic polyurethane product made from the reaction of a difunctional isocyanate with a polyester or a polyether diol, along with a monomeric, low molecular weight diol as a chain extender. The preformed thermoplastic polyurethane product is then cross-linked by the addition of an isocyanate prepolymer made from the reaction of an excess of a polyisocyanate with a polyester or polyether polyol. The invention further comprises a process for forming the thermoplastic polyurethane product described above utilizing a single or twin screw extruder to mix and react the ingredients.
    Type: Grant
    Filed: March 18, 1999
    Date of Patent: July 10, 2001
    Assignee: BASF Corporation
    Inventors: Armando Sardanopoli, J. Richard Stonehouse