Patents by Inventor Frederick J. Karol

Frederick J. 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).

  • Cyclopentadienyl chromium oxides
    Patent number: 4153576
    Abstract: Cyclopentadienyl chromium alkyl/aryl oxides and siloxides have been synthesized which when deposited on silica and treated with a silane show catalytic activity in the polymerization of ethylene. These chromium compounds also can be used for scavenging oxygen and volatile sulfur compounds from various liquid and gaseous streams.
    Type: Grant
    Filed: May 2, 1978
    Date of Patent: May 8, 1979
    Assignee: Union Carbide Corporation
    Inventors: Frederick J. Karol, Chisung Wu, Walter T. Reichle, Norma J. Maraschin
  • Titanium-modified silyl chromate catalysts for ethylene polymerization
    Patent number: 4152502
    Abstract: A catalyst for the preparation of ethylene polymers having higher melt indexes comprises a silyl chromate deposited on a silica support containing both aluminum and titanium.
    Type: Grant
    Filed: April 12, 1978
    Date of Patent: May 1, 1979
    Assignee: Union Carbide Corporation
    Inventors: Isaac J. Levine, Frederick J. Karol
  • .pi. Allyl chromium complex catalyst and process for preparing same
    Patent number: 4054538
    Abstract: Ethylene polymerization catalyst which is .pi. allyl chromium compound in the chromium [II] valence state and supported on silica or silica-alumina, and a process for making such catalyst.
    Type: Grant
    Filed: August 3, 1973
    Date of Patent: October 18, 1977
    Assignee: Union Carbide Corporation
    Inventors: Robert N. Johnson, Frederick J. Karol
  • Preparation of low and medium density ethylene polymer in fluid bed reactor
    Patent number: 4011382
    Abstract: A supported catalyst is used in the low pressure catalytic copolymerization of ethylene with C.sub.3 to C.sub.6 .alpha.-olefins in a fluid bed reactor to produce polymers having a density of less than 0.941 and a melt index of >0.0 to at least about 2.0. The supported catalyst contains about 0.05 to 3.0 weight % of chromium, about 1.5 to 9.0 weight % of titanium and >0.0 to about 2.5 weight % of fluorine.
    Type: Grant
    Filed: March 10, 1975
    Date of Patent: March 8, 1977
    Assignee: Union Carbide Corporation
    Inventors: Isaac J. Levine, Frederick J. Karol