Patents by Inventor Cornelis Petrus Valkering

Cornelis Petrus Valkering 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).

  • Bituminous composition with diene/monovinyl aromatic block copolymer
    Patent number: 5854335
    Abstract: A bituminous composition which comprises a bituminous component and a block copolymer of a conjugated diene and a monovinylaromatic hydrocarbon, wherein the block copolymer has a vinyl content of at least 25% by weight based on the total diene content and a diblock content of 25 wt % or less, whereas the diblock has an apparent molecular weight which is in the range of from 100,000 to 170,000, is of use particularly in roofing applications.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: December 29, 1998
    Assignee: Shell Oil Company
    Inventors: Gerardus Wilhelmus Jozef Heimerikx, Aloysius Josephus Atoius Maria Van Hoek, Cornelis Petrus Valkering, Jeroen Van Westrenen