Patents by Inventor Johannes Vaassen

Johannes Vaassen 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).

  • Stabilized polypropylene resin composition
    Publication number: 20050085574
    Abstract: The invention relates to a polypropylene resin composition which is stabilized against photo-induced oxidation. The composition comprises a hindered amine-based light stabilizer (HALS), having a molecular weight equal or below 1250; a phenolic antioxidant (PAO) with a molecular weight of equal or below 750; and a pigment. The ratio of HALS to PAO is less than 5.
    Type: Application
    Filed: February 21, 2003
    Publication date: April 21, 2005
    Inventors: Pieter Gijsman, Jacobus Sampers, Wytske Bunge, Johannes Vaassen