Patents by Inventor Rolf Cornils

Rolf Cornils 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).

  • Production of low-filler rubber powders by the grinding process
    Patent number: 4157790
    Abstract: A process for the production of rubber powder having a particle size of from about 200 to 1500 .mu. and a powdering agent content of less than 7% by weight by grinding rubber particles, wherein the rubber is initially mechanically size-reduced into surface-rich and pore-rich particles, the entire quantity of powdering agent is added to the rubber particles, which are then ground at low temperature to prevent the rubber from flowing, non-adsorbed or freshly added powdering agent is adsorbed by the rubber powder in a zone following the grinding machine, and the rubber powder obtained is cooled to such an extent that no warm flow of the rubber occurs.
    Type: Grant
    Filed: October 21, 1977
    Date of Patent: June 12, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Otto Benn, Rolf Cornils, Gerhard Giersiepen