Patents by Inventor Richard Karpeles

Richard Karpeles 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).

  • Process for producing polyolefin elastomer employing a metallocene catalyst
    Patent number: 6225426
    Abstract: A liquid phase polymerization process is provided for producing a polyolefin elastomer, e.g., one derived from ethylene, another &agr;-olefin such as propylene and optionally, a diene, employing a metallocene catalyst. The process comprises contacting monomer under liquid phase polymerization conditions with a catalyst composition obtained by combining (a) a metallocene procatalyst, preferably one containing a bridging group possessing at least two bulky groups, and (b) a cocatalyst such as aluminoxane, preferably a cation-generating cocatalyst, in partial or total replacement of aluminoxane.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: May 1, 2001
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Daniel J. Gillis, Richard Karpeles
  • Metallocene catalyst composition and process for activating a metallocene procatalyst
    Patent number: 6147025
    Abstract: A metallocene catalyst is provided which comprises the product obtained by combining (a) a metallocene procatalyst, preferably one containing a bridging group possessing at least two bulky groups, and (b) a cation-generating cocatalyst. A process for activating a metallocene procatalyst is also provided which comprises combining the metallocene procatalyst with the components of a cation-generating cocatalyst.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: November 14, 2000
    Assignee: Uniroyal Chemical Company, Inc,
    Inventors: Daniel J. Gillis, Richard Karpeles
  • Process for producing polyolefin elastomer employing a metallocene catalyst
    Patent number: 6136744
    Abstract: A cation-generating cocatalyst is provided for activating a metallocene procatalyst. The cocatalyst comprises (1) a metal- and/or metalloid-containing first component, e.g., an aluminum compound, (2) a neutral metal- and/or metalloid-containing second component, e.g., a borane compound, and (3) an anionic metal- and/or metalloid-containing third component, e.g., a metal containing borate.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: October 24, 2000
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Daniel J. Gillis, Richard Karpeles
  • Process for producing polyolefin elastomer employing a metallocene catalyst
    Patent number: 6060572
    Abstract: A liquid phase polymerization process is provided for producing a polyolefin elastomer, e.g., one derived from ethylene, another .alpha.-olefin such as propylene and, optionally, a diene, employing a metallocene catalyst. The process comprises contacting monomer under liquid phase polymerization conditions with a catalyst composition obtained by combining (a) a metallocene procatalyst, preferably one containing a bridging group possessing at least two bulky groups, and (b) a cocatalyst such as aluminoxane, preferably a cation-generating cocatalyst, in partial on total replacement of aluminoxane.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: May 9, 2000
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Daniel J. Gillis, Richard Karpeles