Patents by Inventor Wilhelmus J. P. S. M. van Riggelen

Wilhelmus J. P. S. M. van Riggelen 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).

  • Use of a polyester in the preparation of coatings for the interior of can ends
    Patent number: 5739215
    Abstract: The invention relates to the use of a hydroxyl functional polyester having a glass transition temperature of at least 40.degree. C., a hydroxylnumber between 5 and 150 mg KOH/gram resin, a molecular weight (Mn) between 800 and 10.000 and a molecular weight (Mw) between 8000 and 100.000 in the preparation of coatings for the interior of can ends. The polyester has to be crosslinked with for example an amino resin or an epoxy resins.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: April 14, 1998
    Assignee: DSM N.V.
    Inventors: Wilhelmina Westerhof, Dirk J. Kolk, Wilhelmus J. P. S. M. van Riggelen