Patents by Inventor Fredrick John Karol

Fredrick John Karol 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).

  • Fused ring catalyst and ethylene polymerization process therewith
    Patent number: 4015059
    Abstract: Bis(indenyl)- and bis(fluorenyl)-chromium [II] compounds are deposited on activated inorganic oxide supports to provide catalysts which are useful in the presence of hydrogen, alone, or with cyclopentadiene compounds, for the polymerization of ethylene in high yields. These catalysts exhibit good thermal stability and show a unique response to cyclopentadiene compounds which allows production of polymers having a relatively broad range of melt index values.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: March 29, 1977
    Assignee: Union Carbide Corporation
    Inventor: Fredrick John Karol