Patents by Inventor Patrick Chang

Patrick Chang 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).

  • Patent number: 6432543
    Abstract: The aromatic polyurethane elastomers of the present invention are particularly suited for methods of making objects in a mold cavity. The objects generally include an elastomeric layer formed from an aromatic polyurethane and a foam layer which is subsequently applied to the elastomer. The aromatic elastomer of the present invention lends itself to being precoated with an in-mold coating or being painted after demolding the resulting part.
    Type: Grant
    Filed: July 29, 1998
    Date of Patent: August 13, 2002
    Assignee: BASF Corporation
    Inventors: Richard P. Harrison, Joseph Ogonowski, Jon P. Pavlinac, L. Patrick Chang
  • Patent number: 6352658
    Abstract: The method of the present invention is particularly suited for making decorative objects in a mold cavity. The method enables one to form a decorative component having an outer elastomeric layer that is integral with an inner layer of foam. Because the chemical formulation for the outer layer and the inner layer is identical, other than the inner layer includes a foaming agent, the decorative component does not suffer from the drawbacks of the previous methods such as, for example, poor adhesion between the elastomeric layer and the foam layer causing delamination of the two layers, sinks or holes in the foam layer leading to imperfections in the elastomeric layer, and bleed through to the elastomeric layer from the foam layer. The method permits the mold to be pre-coated with an in-mold paint prior to the molding process. Coatings can also be applied after demolding the resulting part.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: March 5, 2002
    Assignee: BASF Corporation
    Inventors: L. Patrick Chang, Jon Pavlinac, Joseph Ogonowski, Richard P. Harrison
  • Publication number: 20020001722
    Abstract: The aromatic polyurethane elastomers of the present invention are particularly suited for methods of making objects in a mold cavity. The objects generally include an elastomeric layer formed from an aromatic polyurethane and a foam layer which is subsequently applied to the elastomer. The aromatic elastomer of the present invention lends itself to being precoated with an in-mold coating or being painted after demolding the resulting part.
    Type: Application
    Filed: July 29, 1998
    Publication date: January 3, 2002
    Inventors: RICHARD P. HARRISON, JOSEPH OGONOWSKI, JON P. PAVLINAC, L. PATRICK CHANG