U.S. patents available from 1976 to present.
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Bridged bi-aromatic ligands, catalysts, processes for polymerizing and polymers therefrom

Patent 7659415 Issued on February 9, 2010. Estimated Expiration Date: Icon_subject July 9, 2027. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

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Inventor: Smith

Titanium complexes and catalysts prepared therefrom
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Production of olefin polymers
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Issued on: 01/31/1995
Inventor: Fujita

Catalyst composition
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Inventor: Kolthammer, et al.

Ionic metallocene catalyst compositions
Patent #: 5599761
Issued on: 02/04/1997
Inventor: Turner

More ...

Inventors

Assignee

Application

No. 11775095 filed on 07/09/2007

US Classes:

556/51Titanium, zirconium, or hafnium containing (Ti, Zr, or Hf)

Examiners

Primary: Lu, Caixia

Attorney, Agent or Firm

Foreign Patent References

  • 0277004 EP 08/01/1988
  • 0534405 EP 03/01/1993
  • 0582194 EP 02/01/1994
  • 0622380 EP 11/01/1994
  • 0292134 EP 11/01/1998
  • 0922712 EP 06/01/1999
  • 1110930 EP 06/01/2001
  • 08134064 JP 05/01/1996
  • 08217775 JP 08/01/1996
  • 2002280179 JP 09/01/2002
  • 9407926 WO 04/01/1994
  • 9411409 WO 05/01/1994
  • 9803521 WO 06/01/1998
  • 9905186 WO 02/01/1999
  • 9906413 WO 02/01/1999
  • 9942467 WO 08/01/1999
  • 0009255 WO 02/01/2000
  • 0100581 WO 01/01/2001
  • 0148028 WO 07/01/2001
  • 0198371 WO 12/01/2001
  • 0202576 WO 01/01/2002
  • 0236638 WO 05/01/2002
  • 02083306 WO 10/01/2002
  • 02085820 WO 10/01/2002
  • 2005108406 WO 11/01/2005
  • 03091262 WO 05/01/2008

International Classes

C07F 7/00
C07F 7/28
C08F 4/60
B01J 31/22

Abstract

New ligands and compositions with bridged bis-aromatic ligands are disclosed that catalyze the polymerization of monomers into polymers. These catalysts with metal centers have high performance characteristics, including higher comonomer incorporation into ethylene/olefin copolymers, where such olefins are for example, 1-octene, propylene or styrene. The catalysts also polymerize propylene into isotactic polypropylene.

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