Patents by Inventor Elisa Zecchi

Elisa Zecchi 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).

  • Ethylene-propylene elastomeric copolymers with a low content of residual chlorine
    Patent number: 5491208
    Abstract: In an improved process for producing elastomeric ethylene-propylene copolymers with a propylene content comprised within the range of from 22 to 38% by weight and a content of residual chlorine, coming from the co-catalyst, lower than 300 parts per million parts, the polymerization is carried out in suspension in the monomers in the liquid state, with vanadium triacetylacetonate and alkyl-Al compounds, and the obtained polymer is recovered without any washing steps.
    Type: Grant
    Filed: March 31, 1994
    Date of Patent: February 13, 1996
    Assignee: Enichem Elastomeri S.r.l.
    Inventors: Tiziano Tanaglia, Viviano Banzi, Elisa Zecchi