Patents by Inventor Arno Avela

Arno Avela 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).

  • Method for preventing fouling and sheeting in gas phase reactors
    Patent number: 6096837
    Abstract: A method for preventing sheeting problems in a gas phase reactor in such multi-phase polymerization process, which comprises at least one loop reactor followed by a gas phase reactor, where the polymerization is continued in the presence of added monomers, and in which process a fouling preventive agent is used to prevent fouling or sheeting in the reactors. According to the invention 30-70% of the end product is polymerized in the loop reactor, where the whole amount of the fouling preventive agent is added, the amount of the fouling preventive agent being higher than necessary to prevent the fouling in the loop reactor.
    Type: Grant
    Filed: January 9, 1998
    Date of Patent: August 1, 2000
    Inventors: Ari Palmroos, Arno Avela, Auli Nummila-Pakarinen, Kari Matilainen