Patents by Inventor Luanne M. Allen

Luanne M. Allen 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 polymerizing alpha-olefins with trimethylaluminum-activated catalyst
    Patent number: 5055533
    Abstract: A catalyst composition for polymerizing alpha-olefins is prepared by reacting a transition metal compound, e.g., titanium, with trimethylaluminum catalyst activator. In a preferred embodiment, the catalyst is supported on a porous refractory support and is prepared by additionally reacting a magnesium compound or an organomagnesium composition with the support.Also disclosed is a process for polymerizing alpha-olefins in the presence of the catalyst of the invention. The polymer products have higher bulk density and produce films of greater strength than polymers prepared with similar catalysts utilizing different alkyl-aluminum activators, e.g., triethylaluminum and tri-isobytylaluminum.
    Type: Grant
    Filed: July 24, 1989
    Date of Patent: October 8, 1991
    Assignee: Mobil Oil Corporation
    Inventors: Luanne M. Allen, Robert O. Hagerty, Richard O. Mohring
  • Catalyst composition for polymerizing alpha-olefins
    Patent number: 4888318
    Abstract: A catalyst composition for polymerizing alpha-olefins is prepared by reacting a transition metal compound, e.g., titanium, with trimethylaluminum catalyst activator. In a preferred embodiment, the catalyst is supported on a porous refractory support and is prepared by additionally reacting a magnesium compound or an organomagnesium composition with the support.Also disclosed is a process for polymerizing alpha-olefins in the presence of the catalyst of the invention. The polymer products have higher bulk density and produce films of greater strength than polymers prepared with similar catalysts utilizing different alkyl-aluminum activators, e.g., triethylaluminum and tri-isobutylaluminum.
    Type: Grant
    Filed: December 24, 1987
    Date of Patent: December 19, 1989
    Assignee: Mobil Oil Corporation
    Inventors: Luanne M. Allen, Robert O. Hagerty, Richard O. Mohring
  • Catalyst composition for polymerizing alpha-olefins
    Patent number: 4732882
    Abstract: A catalyst composition for polymerizing alpha-olefins is prepared by reacting a transition metal compound, e.g., titanium, with trimethylaluminum catalyst activator. In a preferred embodiment, the catalyst is supported on a porous refractory support and is prepared by additionally reacting a magnesium compound or an organomagnesium composition with the support.Also disclosed is a process for polymerizing alpha-olefins in the presence of the catalyst of the invention. The polymer products have higher bulk density and produce films of greater strength than polymers prepared with similar catalysts utilizing different alkyl-aluminum activators, e.g., triethylaluminum and tri-isobutylaluminum.
    Type: Grant
    Filed: January 24, 1986
    Date of Patent: March 22, 1988
    Assignee: Mobil Oil Corporation
    Inventors: Luanne M. Allen, Robert O. Hagerty, Richard O. Mohring