Patents by Inventor Kyriacos Agapiou

Kyriacos Agapiou 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).

  • Catalyst composition and methods for its preparation and use in a polymerization process
    Patent number: 7354880
    Abstract: The present invention relates to a catalyst composition and a method for making the catalyst composition of a polymerization catalyst and a carboxylate metal salt. The invention is also directed to the use of the catalyst composition in the polymerization of olefin(s). In particular, the polymerization catalyst system is supported on a carrier. More particularly, the polymerization catalyst comprises a bulky ligand metallocene-type catalyst system.
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: April 8, 2008
    Assignee: Univation Technologies, LLC
    Inventors: Agapios Kyriacos Agapiou, Chi-I Kuo, David Michael Glowczwski, Steven Kent Ackerman
  • Polymerization process using metallocene catalyst systems
    Patent number: 7244795
    Abstract: The present invention relates to a polymerization process using improved metallocene catalyst systems. Specifically, the catalyst systems of the present invention relate to a metallocene compound having optimized metals loading and activator concentration, and demonstrate improved operability and productivity. In an exemplary embodiment, the improved metallocene catalyst system of the present invention comprises a metallocene catalyst compound activated by methylaluminoxane, and a support material, the methylaluminoxane being present in the range of from 3 to 9 mmole methylaluminoxane per gram of support material, and the metallocene being present in the range of from 0.01 to 1.0 mmole metallocene per gram of support material.
    Type: Grant
    Filed: December 8, 2003
    Date of Patent: July 17, 2007
    Assignee: Univation Technologies, LLC
    Inventors: Agapios Kyriacos Agapiou, David Michael Glowczwski
  • Catalyst composition and methods for its preparation and use in a polymerization process
    Patent number: 7001961
    Abstract: The present invention relates to a catalyst composition and a method for making the catalyst composition which comprises a polymerization catalyst and at least one gelling agent. The invention is also directed to the use of the catalyst composition in the polymerization of olefin(s). In particular, the polymerization catalyst system is supported on a carrier.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: February 21, 2006
    Assignee: Univation Technologies, LLC
    Inventors: Agapios Kyriacos Agapiou, Chi-I Kuo, David M. Glowczwski, Steven K. Ackerman
  • Processes for transitioning between metallocene and Ziegler-Natta polymerization catalysts
    Patent number: 6995217
    Abstract: Processes for transitioning among polymerization catalyst systems, preferably catalyst systems that are incompatible with each other. In particular, the processes relate to transitioning from olefin polymerizations utilizing metallocene catalyst systems to olefin polymerizations utilizing traditional Ziegler-Natta catalyst systems.
    Type: Grant
    Filed: July 28, 2005
    Date of Patent: February 7, 2006
    Assignee: Univation Technologies, LLC
    Inventors: Agapios Kyriacos Agapiou, Robert Olds Hagerty, F. David Hussein, Michael Elroy Muhle, Richard B. Pannell, Kathryn Ann Russell, Robert Lynn Santana, X. Simon Zhang
  • Processes for transitioning between metallocene and Ziegler-Natta polymerization catalysts
    Patent number: 6949612
    Abstract: Processes for transitioning among polymerization catalyst systems, preferably catalyst systems that are incompatible with each other. In particular, the processes relate to transitioning from olefin polymerizations utilizing metallocene catalyst systems to olefin polymerizations utilizing traditional Ziegler-Natta catalyst systems.
    Type: Grant
    Filed: November 18, 2003
    Date of Patent: September 27, 2005
    Assignee: Univation Technologies, LLC
    Inventors: Agapios Kyriacos Agapiou, Robert Olds Hagerty, F. David Hussein, Michael Elroy Muhle, Richard B. Pannell, Kathryn Ann Russell, Robert Lynn Santana, X. Simon Zhang
  • Catalyst composition and methods for its preparation and use in a polymerization process
    Patent number: 6933258
    Abstract: The present invention relates to a catalyst composition and a method for making the catalyst composition which comprises a polymerization catalyst and at least one gelling agent. The invention is also directed to the use of the catalyst composition in the polymerization of olefin(s). In particular, the polymerization catalyst system is supported on a carrier.
    Type: Grant
    Filed: November 15, 2001
    Date of Patent: August 23, 2005
    Assignee: Univation Technologies, L.L.C.
    Inventors: Agapios Kyriacos Agapiou, Chi-I Kuo, David M. Glowczwski, Steven K. Ackerman
  • Polymerization process using metallocene catalyst systems
    Publication number: 20050124487
    Abstract: The present invention relates to a polymerization process using improved metallocene catalyst systems. Specifically, the catalyst systems of the present invention relate to a metallocene compound having optimized metals loading and activator concentration, and demonstrate improved operability and productivity. In an exemplary embodiment, the improved metallocene catalyst system of the present invention comprises a metallocene catalyst compound activated by methylaluminoxane, and a support material, the methylaluminoxane being present in the range of from 3 to 9 mmole methylaluminoxane per gram of support material, and the metallocene being present in the range of from 0.01 to 1.0 mmole metallocene per gram of support material.
    Type: Application
    Filed: December 8, 2003
    Publication date: June 9, 2005
    Applicant: UNIVATION TECHNOLOGIES, LLC
    Inventors: Agapios Kyriacos Agapiou, David Michael Glowczwski
  • Processes for transitioning between metallocene and ziegler-natta polymerization catalysts
    Publication number: 20040181016
    Abstract: Processes for transitioning among polymerization catalyst systems, preferably catalyst systems that are incompatible with each other. In particular, the processes relate to transitioning from olefin polymerizations utilizing metallocene catalyst systems to olefin polymerizations utilizing traditional Ziegler-Natta catalyst systems.
    Type: Application
    Filed: November 18, 2003
    Publication date: September 16, 2004
    Inventors: Agapios Kyriacos Agapiou, Robert Olds Hagerty, F. David Hussein, Michael Elroy Muhle, Richard B. Pannell, Kathryn Ann Russell, Robert Lynn Santana, X. Simon Zhang
  • Catalyst composition and methods for its preparation and use in a polymerization process
    Patent number: 6608153
    Abstract: The present invention relates to a catalyst composition and a method for making the catalyst composition of a polymerization catalyst and a carboxylate metal salt. The invention is also directed to the use of the catalyst composition in the polymerization of olefin(s). In particular, the polymerization catalyst system is supported on a carrier. More particularly, the polymerization catalyst comprises a bulky ligand metallocene-type catalyst system.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: August 19, 2003
    Assignee: Univation Technologies, LLC
    Inventors: Agapios Kyriacos Agapiou, Chi-I Kuo, David Michael Glowczwski, Steven Kent Ackerman
  • Catalyst composition and methods for its preparation and use in a polymerization process
    Publication number: 20020123579
    Abstract: The present invention relates to a catalyst composition and a method for making the catalyst composition of a polymerization catalyst and a carboxylate metal salt. The invention is also directed to the use of the catalyst composition in the polymerization of olefin(s). In particular, the polymerization catalyst system is supported on a carrier. More particularly, the polymerization catalyst comprises a bulky ligand metallocene-type catalyst system.
    Type: Application
    Filed: November 6, 2001
    Publication date: September 5, 2002
    Inventors: Agapios Kyriacos Agapiou, Chi-I Kuo, David Michael Glowczwski, Steven Kent Ackerman
  • Catalyst composition and methods for its preparation and use in a polymerization process
    Publication number: 20020111264
    Abstract: The present invention relates to a catalyst composition and a method for making the catalyst composition which comprises a polymerization catalyst and at least one gelling agent. The invention is also directed to the use of the catalyst composition in the polymerization of olefin(s). In particular, the polymerization catalyst system is supported on a carrier.
    Type: Application
    Filed: November 15, 2001
    Publication date: August 15, 2002
    Inventors: Agapios Kyriacos Agapiou, Chi-I Kuo, David M. Glowczwski, Steven K. Ackerman
  • Metallocene stabilized alumoxane
    Patent number: 6413900
    Abstract: Stabilized alumoxane solutions are provided as well as a method for producing such solutions. The method generally involves the use of metallocene catalyst component(s) that when mixed with alumoxane solutions reduce the tendency for such solutions to form gels.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: July 2, 2002
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Agapios Kyriacos Agapiou, Patrick Brant
  • CATALYST COMPOSITION AND METHODS FOR ITS PREPARATION AND USE IN A POLYMERIZATION PROCESS
    Publication number: 20020004448
    Abstract: The present invention relates to a catalyst composition and a method for making the catalyst composition of a polymerization catalyst and a carboxylate metal salt. The invention is also directed to the use of the catalyst composition in the polymerization of olefin(s). In particular, the polymerization catalyst system is supported on a carrier. More particularly, the polymerization catalyst comprises a bulky ligand metallocene-type catalyst system.
    Type: Application
    Filed: July 10, 1998
    Publication date: January 10, 2002
    Inventors: AGAPIOS KYRIACOS AGAPIOU, CHI-I KUO, DAVID MICHAEL GLOWCZWSKI, STEVEN KENT ACKERMAN
  • Metallocene stabilized alumoxane
    Patent number: 6180808
    Abstract: Stabilized alumoxane solutions are provided as well as a method for producing such solutions. The method generally involves the use of metallocene catalyst component(s) that when mixed with alumoxane solutions reduce the tendency for such solutions to form gels.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: January 30, 2001
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Agapios Kyriacos Agapiou, Patrick Brant
  • Polymerization catalyst systems, their production and use
    Patent number: 6140432
    Abstract: This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported metallocene catalyst which when utilized in a polymerization process substantially reduces reactor fouling and sheeting in a gas or slurry polymerization process.
    Type: Grant
    Filed: July 13, 1995
    Date of Patent: October 31, 2000
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Agapios Kyriacos Agapiou, Chi-I Kuo, Michael Elroy Muhle, Anthony Nicholas Speca
  • Polymerization catalyst systems, their production and use
    Patent number: 6117955
    Abstract: This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported metallocene catalyst which when utilized in a polymerization process substantially reduces reactor fouling and sheeting in a gas or slurry polymerization process.
    Type: Grant
    Filed: July 30, 1996
    Date of Patent: September 12, 2000
    Assignee: Exxon Chemical Patents Inc
    Inventors: Agapios Kyriacos Agapiou, Chi-I Kuo, Michael Elroy Muhle, Anthony Nicholas Speca
  • Olefin polymerization process with little or no scavenger present
    Patent number: 5763543
    Abstract: The present invention relates to a continuous process for the polymerization of olefin(s) utilizing a metallocene catalyst or catalyst system in a continuous slurry or gas phase polymerization process for polymerizing monomer(s). The invention is more particularly drawn to a gas phase polymerization process for polymerizing one or more olefin(s), alone or in combination, in the presence of a metallocene catalyst system in a fluidized bed reactor, preferably operating in a condensed mode.
    Type: Grant
    Filed: September 14, 1994
    Date of Patent: June 9, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Michael Elroy Muhle, Gary Thomas Renola, Agapios Kyriacos Agapiou, Dwayne Lee Litteer, John Robert Griffin
  • Process for transitioning between incompatible polymerization catalysts
    Patent number: 5753786
    Abstract: This invention relates to a process for transitioning between incompatible polymerization catalyst systems. Particularly, the invention relates to a process for transitioning from an olefin polymerization reaction utilizing a traditional Ziegler-Natta catalyst system to a metallocene-olefin polymerization reaction.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: May 19, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Agapios Kyriacos Agapiou, Michael Elroy Muhle, Gary Thomas Renola
  • Process for transitioning between incompatible polymerization catalysts
    Patent number: 5747612
    Abstract: This invention relates to a process for transitioning between incompatible polymerization catalyst systems. Particularly, the invention relates to a process for transitioning from an olefin polymerization reaction utilizing a traditional Ziegler-Natta catalyst system to a metallocene-olefin polymerization reaction.
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: May 5, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Agapios Kyriacos Agapiou, Michael Elroy Muhle, Gary Thomas Renola
  • Polymerization process
    Patent number: 5712352
    Abstract: The present invention relates to a continuous process for the polymerization of olefin(s) utilizing a metallocene catalyst or catalyst system in a continuous slurry or gas phase polymerization process. The invention is more particularly drawn to a gas phase polymerization process for polymerizing one or more olefin(s) in the presence of a metallocene catalyst system in a fluidized bed reactor in the absence of or with a low mount of a scavenger.
    Type: Grant
    Filed: October 30, 1995
    Date of Patent: January 27, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Patrick Brant, John R. Griffin, Michael Elroy Muhle, Dwayne Lee Litteer, Agapios Kyriacos Agapiou, Gary Thomas Renola