Patents by Inventor Malama Chibwe

Malama Chibwe 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).

  • Publication number: 20050250762
    Abstract: The present invention is directed to a crystalline polymorph of bazedoxifene acetate, compositions containing the same, preparations thereof, and uses thereof.
    Type: Application
    Filed: April 6, 2005
    Publication date: November 10, 2005
    Applicant: Wyeth
    Inventors: Kadum Ali, Pietro Allegrini, Aldo Belli, Roberto Brescello, Vincenzo Cannata, Malama Chibwe, Livius Cotarca, Shridhar Gangolli, Carl Longfellow, Giorgio Soriato, Massimo Verzini
  • Patent number: 6391278
    Abstract: A neutral templating route to mesoporous molecular sieves based on H-bonding and self-assembly between neutral primary amine or diamine surfactants (S°) and neutral inorganic precursors (I°) has been used to prepare hexagonal and lamellar mesoporous silicas with site isolated transition metal centers. This templating approach allows for the preparation of hexagonal or hexagonal-like mesoporous oxidation catalysts with large framework wall thickness of at least about 17 Å, small elementary particle size (≦400 Å), and unique combinations of framework-confined mesopores and textural mesopores while at the same time providing for facile recovery of the neutral template by simple solvent extraction.
    Type: Grant
    Filed: February 8, 1999
    Date of Patent: May 21, 2002
    Assignee: Board of Trustees operating Michigan State University
    Inventors: Thomas J. Pinnavaia, Peter T. Tanev, Wenzhong Zhang, Jialiang Wang, Malama Chibwe
  • Patent number: 6193943
    Abstract: A neutral templating route to mesoporous molecular sieves based on H-bonding and self-assembly between neutral primary amine or diamine surfactants (S°) and neutral inorganic precursors (I°) has been used to prepare hexagonal and lamellar mesoporous silicas with site isolated transition metal centers. This templating approach allows for the preparation of hexagonal or hexagonal-like mesoporous oxidation catalysts with large framework wall thickness of at least about 17 Å, small elementary particle size (≦400 Å), and unique combinations of framework-confined mesopores and textural mesopores while at the same time providing for facile recovery of the neutral template by simple solvent extraction.
    Type: Grant
    Filed: February 11, 1997
    Date of Patent: February 27, 2001
    Assignee: Board of Trustees operating Michigan State University
    Inventors: Thomas J. Pinnavaia, Peter T. Tanev, Wenzhong Zhang, Jialiang Wang, Malama Chibwe
  • Patent number: 5855864
    Abstract: A neutral templating route to mesoporous molecular sieves based on H-bonding and self-assembly between neutral primary amine or diamine surfactants (S.degree.) and neutral inorganic precursors (I.degree.) has been used to prepare hexagonal and lamellar mesoporous silicas with site isolated transition metal centers. This templating approach allows for the preparation of hexagonal or hexagonal-like mesoporous oxidation catalysts with large framework wall thickness of at least about 17 .ANG., small elementary particle size (.ltoreq.400 .ANG.), and unique combinations of framework-confined mesopores and textural mesopores while at the same time providing for facile recovery of the neutral template by simple solvent extraction. The templating of neutral metallosilicate precursors (I.degree.) with neutral diamine surfactants (S.degree.-S.degree.
    Type: Grant
    Filed: February 11, 1997
    Date of Patent: January 5, 1999
    Assignee: Board of Trustees operating Michigan State University
    Inventors: Thomas J. Pinnavaia, Peter T. Tanev, Wenzhong Zhang, Jialiang Wang, Malama Chibwe
  • Patent number: 5785938
    Abstract: A process for removing and then capturing noxious sulfur oxides from gas streams, particularly from the flue gases of coal-burning power plants, using Ni-containing heated layered double hydroxide (LDH) as recyclable sorbents. The sorbent compositions contain metal components that form stable metal sulfites and sulfates at one temperature, but are decomposed at a higher temperature to regenerate the sorbent material.
    Type: Grant
    Filed: August 2, 1996
    Date of Patent: July 28, 1998
    Assignee: Board of Trustees operating Michigan State University
    Inventors: Thomas J. Pinnavaia, Malama Chibwe, Jayantha Amarasekera
  • Patent number: 5712402
    Abstract: A neutral templating route to mesoporous molecular sieves based on H-bonding and self-assembly between neutral primary amine or diamine surfactants (S.degree.) and neutral inorganic precursors (I.degree.) has been used to prepare hexagonal and lamellar mesoporous silicas with site isolated transition metal centers. This templating approach allows for the preparation of hexagonal or hexagonal-like mesoporous oxidation catalysts with large framework wall thickness of at least about 17 .ANG., small elementary particle size (.ltoreq.400 .ANG.), and unique combinations of framework-confined mesopores and textural mesopores while at the same time providing for facile recovery of the neutral template by simple solvent extraction.These new mesoporous metallosilicate molecular sieves exhibit exceptional catalytic activity for peroxide hydroxylation of benzene and oxidation of substituted aromatics with kinetic diameters that are too large (larger than 6 .ANG.
    Type: Grant
    Filed: March 23, 1995
    Date of Patent: January 27, 1998
    Assignee: Board of Trustees operating Michigan State University
    Inventors: Thomas J. Pinnavaia, Peter T. Tanev, Wenzhong Zhang, Jialiang Wang, Malama Chibwe
  • Patent number: 5463042
    Abstract: A layered double hydroxide intercalated with a metal complex of a polyaryl compound is described. A preferred complex is porphin or phthylocyanine. The metals are preferably selected from Group VII-B and Group VIII cobalt and iron triads. The resulting LDH metal complexes are useful for the oxidation of oxidate compounds such as thiols and phenols.
    Type: Grant
    Filed: January 25, 1994
    Date of Patent: October 31, 1995
    Assignee: Board of Trustees operating Michigan State University
    Inventors: Thomas J. Pinnavaia, Elena M. Perez-Bernal, Ricardo Ruarno-Casero, Malama Chibwe
  • Patent number: 5459259
    Abstract: A layered double hydroxide intercalated with a metal complex of a polyaryl compound is described. A preferred complex is porphin or phthylocyanine. The metals are preferably selected from Group VII-B and Group VIII cobalt and iron triads. The resulting LDH metal complexes are useful for the oxidation of oxidate compounds such as thiols and phenols.
    Type: Grant
    Filed: January 25, 1994
    Date of Patent: October 17, 1995
    Assignee: Board of Trustees operating Michigan State University
    Inventors: Thomas J. Pinnavaia, Elena M. Perez-Bernal, Ricardo Ruarno-Casero, Malama Chibwe
  • Patent number: 5453526
    Abstract: A layered double hydroxide intercalated with a metal complex of a polyaryl compound is described. A preferred complex is porphin or phthylocyanine. The metals are preferably selected from Group VII-B and Group VIII cobalt and iron triads. The resulting LDH metal complexes are useful for the oxidation of oxidate compounds such as thiols and phenols.
    Type: Grant
    Filed: January 31, 1994
    Date of Patent: September 26, 1995
    Assignee: Board of Trustees operating Michigan State University
    Inventors: Thomas J. Pinnavaia, Elena M. Perez-Bernal, Ricardo Ruarno-Casero, Malama Chibwe
  • Patent number: 5414080
    Abstract: A layered double hydroxide intercalated with a metal complex of a polyaryl compound is described. A preferred complex is porphin or phthylocyanine. The metals are preferably selected from Group VII-B and Group VIII cobalt and iron triads. The resulting LDH metal complexes are useful for the oxidation of oxidate compounds such as thiols and phenols.
    Type: Grant
    Filed: January 25, 1994
    Date of Patent: May 9, 1995
    Assignee: Board of Trustees operating Michigan State University
    Inventors: Thomas J. Pinnavaia, Elena M. Perez-Bernal, Ricardo Ruarno-Casero, Malama Chibwe
  • Patent number: 5302709
    Abstract: A layered double hydroxide intercalated with a metal complex of a polyaryl compound is described. A preferred complex is porphin or phthylocyanine. The metals are preferably selected from Group VII-B and Group VIII cobalt and iron triads. The resulting LDH metal complexes are useful for the oxidation of oxidate compounds such as thiols and phenols.
    Type: Grant
    Filed: November 25, 1992
    Date of Patent: April 12, 1994
    Assignee: Board of Trustees operating Michigan State University
    Inventors: Thomas J. Pinnavaia, Elena M. Perez-Bernal, Ricardo Ruarno-Casero, Malama Chibwe
  • Patent number: 5112784
    Abstract: A process for the preparation of a catalytically active material, which comprises calcining an anionic double hydroxide clay; rehydrating the resulting material by treatment with water substantially free from dissolved ions; and calcining the rehydrated material.
    Type: Grant
    Filed: September 24, 1990
    Date of Patent: May 12, 1992
    Assignee: The British Petroleum Company p.l.c.
    Inventors: Martin P. Atkins, William Jones, Malama Chibwe
  • Patent number: 5110992
    Abstract: A process for the preparation of a glycol ether by reacting an olefin oxide with an excess of an alcohol over a catalyst; characterized in that the catalyst comprises a material which has been prepared by calcination of an anionic double hydroxide clay having a structure comprising magnesium and aluminum in combination, followed by rehydration and subsequent recalcination.
    Type: Grant
    Filed: September 24, 1990
    Date of Patent: May 5, 1992
    Assignee: The British Petroleum Co., p.l.c.
    Inventors: Martin P. Atkins, William Jones, Malama Chibwe