Olefin polymerization process
Patent 5109085 Issued on April 28, 1992. Estimated Expiration Date: 
August 27, 2010. 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.
August 27, 2010. 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 3899477 Production of transition metal composition Polymerization of olefins in the presence of polymer supported Ziegler-Natta catalysts Polymer supported Ziegler-Natta catalysts Organoactinide polymer catalysts Organolanthanide catalysts Patent #: 4716257 InventorsAssigneeApplicationNo. 572820 filed on 08/27/1990US Classes:526/160, Transition metal bonded to carbon atom502/102, Plural component system comprising A - Group I to IV metal hydride or organometallic compound - and B - Group IV to VIII metal, lanthanide or actinde compound - (i.e., alkali metal, Ag, Au, Cu, alkaline earth metal, Be, Mg, Zn, Cd, Hg, Sc, Y, Al, Ga, In, Tl, Ti, Zn, Hf, Ge, Sn or Pb hydride or organometallic compound and Ti, Zr, Hf, Ge, Sn, Pb, V, Nb, Ta, As, Sb, Bi, Cr, Mo, W, Po, Mn, Tc, Re, Iron group, Platinum group, atomic number 57 to 71 inclusive or atomic number 89 or higher compound)502/154, Including metal compound containing different metal than that bonded to carbon526/127, Contains non-transition free metal, hydride thereof, or carbon to non-transition metal atom bond526/151, At least one atom of Group IIIA metal (Al, Ga, In, Tl) in elemental form or bonded to hydrogen or carbon atom526/152, At least one atom of Group IA metal (Li, Na, K, Rb, Cs, Fr) in elemental form or bonded to hydrogen or carbon atom526/279, From monomer containing a silicon atom526/348.4, Six carbon atoms only526/905POLYMERIZATION IN PRESENCE OF TRANSITION METAL CONTAINING CATALYST IN PRESENCE OF HYDROGENExaminersPrimary: Teskin, FredAttorney, Agent or FirmInternational ClassC08F 004/52AbstractA process for polymerizing olefins is disclosed which makes use of a catalyst comprising a cyclopentadienyl lanthanide halide alkali metal ether complex in combination with a cocatalyst comprising an alkali or alkaline earth metal alkyl. Preferred embodiments include the use of hydrogen during the polymerization or the use of an organoaluminum hydride as an additional cocatalyst.Other References
Field of SearchContains non-transition free metal, hydride thereof, or carbon to non-transition metal atom bondAt least one atom of Group IA metal (Li, Na, K, Rb, Cs, Fr) in elemental form or bonded to hydrogen or carbon atom Transition metal bonded to carbon atom Transition metal bonded to carbon atom POLYMERIZATION IN PRESENCE OF TRANSITION METAL CONTAINING CATALYST IN PRESENCE OF HYDROGEN At least one atom of Group IIIA metal (Al, Ga, In, Tl) in elemental form or bonded to hydrogen or carbon atom |
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