Patents by Inventor Larry L. Sterna

Larry L. Sterna 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).

  • Block copolymers and method for making same
    Patent number: 7332542
    Abstract: The present invention is a novel block copolymer containing a controlled distribution copolymer block of a conjugated diene and a mono alkenyl arene, where the controlled distribution copolymer block has terminal regions that are rich in conjugated diene units and a center region that is rich in mono alkenyl arene units. Also disclosed is a method for manufacture of the block copolymer.
    Type: Grant
    Filed: February 10, 2005
    Date of Patent: February 19, 2008
    Assignee: Kraton Polymers U.S. LLC
    Inventors: Robert C. Bening, Dale L. Handlin, Jr., Larry L. Sterna, Carl L. Willis
  • Block copolymers and method for making same
    Patent number: 7244785
    Abstract: The present invention is a novel block copolymer containing a controlled distribution copolymer block of a conjugated diene and a mono alkenyl arene, where the controlled distribution copolymer block has terminal regions that are rich in conjugated diene units and a center region that is rich in mono alkenyl arene units. Also disclosed is a method for manufacture of the block copolymer.
    Type: Grant
    Filed: February 10, 2005
    Date of Patent: July 17, 2007
    Inventors: Robert C. Bening, Dale L. Handlin, Jr., Larry L. Sterna, Carl L. Willis
  • Block copolymers and method for making same
    Patent number: 7169848
    Abstract: The present invention is a novel block copolymer containing a controlled distribution copolymer block of a conjugated diene and a mono alkenyl arene, where the controlled distribution copolymer block has terminal regions that are rich in conjugated diene units and a center region that is rich in mono alkenyl arene units. Also disclosed is a method for manufacture of the block copolymer.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: January 30, 2007
    Assignee: Kraton Polymers U.S. LLC
    Inventors: Robert C. Bening, Dale L. Handlin, Jr., Larry L. Sterna, Carl L. Willis
  • Block copolymers and method for making same
    Patent number: 7138456
    Abstract: The present invention is a novel block copolymer containing a controlled distribution copolymer block of a conjugated diene and a mono alkenyl arene, where the controlled distribution copolymer block has terminal regions that are rich in conjugated diene units and a center region that is rich in mono alkenyl arene units. Also disclosed is a method for manufacture of the block copolymer.
    Type: Grant
    Filed: February 10, 2005
    Date of Patent: November 21, 2006
    Inventors: Robert C. Bening, Dale L. Handlin, Jr., Larry L. Sterna, Carl L. Willis
  • Block copolymers and method for making same
    Patent number: 7067589
    Abstract: The present invention is a novel block copolymer containing a controlled distribution copolymer block of a conjugated diene and a mono alkenyl arene, where the controlled distribution copolymer block has terminal regions that are rich in conjugated diene units and a center region that is rich in mono alkenyl arene units. Also disclosed is a method for manufacture of the block copolymer.
    Type: Grant
    Filed: February 10, 2005
    Date of Patent: June 27, 2006
    Assignee: KRATON Polymers U.S. LLC
    Inventors: Robert C. Bening, Dale L. Handlin, Jr., Larry L. Sterna, Carl L. Willis
  • Novel block copolymers and method for making same
    Publication number: 20030176582
    Abstract: The present invention is a novel block copolymer containing a controlled distribution copolymer block of a conjugated diene and a mono alkenyl arene, where the controlled distribution copolymer block has terminal regions that are rich in conjugated diene units and a center region that is rich in mono alkenyl arene units. Also disclosed is a method for manufacture of the block copolymer.
    Type: Application
    Filed: February 6, 2003
    Publication date: September 18, 2003
    Inventors: Robert C. Bening, Dale L. Handlin, Larry L. Sterna, Carl L. Willis
  • Process for producing ethylene-propylene-diene monomer terpolymer
    Patent number: 5229477
    Abstract: Ethylene-propylene-diene monomer terpolymers having a high degree of random polymerization are produced by employing a high activity, stereo-regular olefin polymerization catalyst comprising a titanium halide-containing procatalyst, an organoaluminum compound cocatalyst and a moderately hindered aromatic heterocyclic amine as selectivity control agent. The terpolymers are elastomeric and exhibit good processability.
    Type: Grant
    Filed: August 26, 1991
    Date of Patent: July 20, 1993
    Assignee: Shell Oil Company
    Inventors: Robert C. Job, Larry L. Sterna
  • Process of producing ethylene-propylene rubbery copolymer
    Patent number: 5134209
    Abstract: Ethylene-propylene rubbery copolymers having a high degree of random polymerization are produced by employing a high activity, stereoregular polymerization catalyst comprising a titanium halide-containing procatalyst, an organoaluminum compound cocatalyst and a moderately hindered aromatic nitrogen heterocycle as selectivity control agent. The ethylene-propylene copolymer has good properties and exhibits improved processability.
    Type: Grant
    Filed: December 26, 1990
    Date of Patent: July 28, 1992
    Assignee: Shell Oil Company
    Inventors: Robert C. Job, Larry L. Sterna