Patents by Inventor Christos Sarafidis

Christos Sarafidis 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).

  • Patent number: 4228263
    Abstract: In the production of elastomeric polypropylene by polymerizing propylene in the presence of a catalyst system which is the reaction product of a metal oxide and and an organometallic compound of Zr, Ti or Hf under conditions such that the reaction medium contains liquid propylene, a fluid, mobile slurry of polypropylene in propylene is formed by mixing the components of the catalyst system together in the presence of the propylene to be polymerized.
    Type: Grant
    Filed: June 20, 1978
    Date of Patent: October 14, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Edward G. Howard, Jr., Christos Sarafidis