Patents by Inventor Joy Stam

Joy Stam 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).

  • Heat sealable PVC blends
    Patent number: 5166269
    Abstract: Blends of styrene-butadiene rubber and PVC latices in a dry weight ratio of 45:10 to 55:70 are useful to form heat sealable films. The mixture does not contain plasticizers and thus reduces environmental concerns during processing. The resulting film have good clarity and flexibility and may be used to seal textiles, non-wovens and boards.
    Type: Grant
    Filed: August 23, 1989
    Date of Patent: November 24, 1992
    Assignee: BASF Corporation
    Inventors: Popke Wietsma, Joy Stam