Patents by Inventor Roger D. Laib

Roger D. Laib 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).

  • Polymerization process using a bimodal silica gel as a catalyst support
    Patent number: 5321105
    Abstract: A bimodal silica gel particle, its method of preparation and its use as a catalyst support in the polymerization of olefins is disclosed. The bimodal silica gel particle exhibits a bimodal pore radius distribution, wherein the silica gel particle has a first average pore radius and a second average pore radius differing by at least about 20 .ANG.. The bimodal silica gel particle is useful as a support for a transition metal-based catalyst to provide a polyolefin having a broad or bimodal molecular weight distribution.
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: June 14, 1994
    Assignee: Quantum Chemical Corporation
    Inventors: Louis J. Rekers, Roger D. Laib
  • Bimodal silica gel, its preparation and use as a catalyst support
    Patent number: 5231066
    Abstract: A bimodal silica gel particle, its method of preparation and its use as a catalyst support in the polymerization of olefins is disclosed. The bimodal silica gel particle exhibits a bimodal pore radius distribution, wherein the silica gel particle has a first average pore radius and a second average pore radius differing by at least about 20 .ANG.. The bimodal silica gel particle is useful as a support for a transition metal-based catalyst to provide a polyolefin having a broad or bimodal molecular weight distribution.
    Type: Grant
    Filed: September 11, 1991
    Date of Patent: July 27, 1993
    Assignee: Quantum Chemical Corporation
    Inventors: Louis J. Rekers, Roger D. Laib
  • Olefin polymerization process employing catalyst prepared from high pore volume, high purity alumina gel
    Patent number: 4650842
    Abstract: Novel high pore volume, high purity alumina gels and catalysts prepared therefrom are provided by a unique alumina gel preparation comprising hydrolyzing an aluminum alcoholate in a medium of a mixture of water and acetone, aging the resultant product and thereafter washing with acetone. Processes for the polymerization of olefins utilizing the afore-described alumina gels are also included herein.
    Type: Grant
    Filed: April 15, 1985
    Date of Patent: March 17, 1987
    Assignee: National Distillers and Chemical Corporation
    Inventors: Anthony N. Speca, Roger D. Laib
  • High pore volume, high purity alumina gels containing a chromium catalyst
    Patent number: 4536489
    Abstract: Novel high pore volume, high purity alumina gels and catalysts prepared therefrom are provided by a unique alumina gel preparation comprising hydrolyzing an aluminum alcoholate in a medium of a mixture of water and acetone aging the resultant product and thereafter washing with acetone. Processes for the polymerization of olefins utilizing the afore-described alumina gels are also included herein.
    Type: Grant
    Filed: September 12, 1983
    Date of Patent: August 20, 1985
    Assignee: National Petro Chemicals Corporation
    Inventors: Anthony N. Speca, Roger D. Laib