Patents by Inventor Martinus C Lok

Martinus C Lok 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).

  • Catalysts with high cobalt surface area
    Patent number: 7501378
    Abstract: A method of making a cobalt-containing catalyst precursor, comprising slurrying a transition alumina powder with an aqueous solution of a cobalt ammine complex, heating the slurry to cause the cobalt ammine complex to decompose with the deposition of an insoluble cobalt compound, filtering the solid residue from the aqueous medium, and drying the solid residue.
    Type: Grant
    Filed: March 18, 2008
    Date of Patent: March 10, 2009
    Assignee: Johnson Matthey PLC
    Inventors: Martinus C. Lok, Gordon J. Kelly, Gavin Gray
  • Catalysts with high cobalt surface area
    Publication number: 20080227633
    Abstract: A method of making a cobalt-containing catalyst precursor, comprising slurrying a transition alumina powder with an aqueous solution of a cobalt ammine complex, heating the slurry to cause the cobalt ammine complex to decompose with the deposition of an insoluble cobalt compound, filtering the solid residue from the aqueous medium, and drying the solid residue.
    Type: Application
    Filed: March 18, 2008
    Publication date: September 18, 2008
    Applicant: Johnson Matthey PLC
    Inventors: Martinus C. Lok, Gordon J. Kelly, Gavin Gray
  • Catalysts with high cobalt surface area
    Patent number: 6927190
    Abstract: A catalyst or precursor thereto comprising cobalt and/or a cobalt compound on a transition alumina support having a total cobalt content of at least 41% by weight and a cobalt surface area, after reduction, greater than 25 m2 per gram of total cobalt. The catalyst or precursor may be made by slurrying a transition alumina powder having a pore volume of at least 0.7 ml/g with an aqueous cobalt ammine carbonate complex and heating the slurry to decompose the complex.
    Type: Grant
    Filed: November 9, 2004
    Date of Patent: August 9, 2005
    Assignee: Johnson Matthey PLC
    Inventors: Martinus C Lok, Gordon J Kelly, Gavin Gray
  • Catalysts with high cobalt surface area
    Publication number: 20030119668
    Abstract: A catalyst or precursor thereto comprising cobalt and/or a cobalt compound on a transition alumina support having a total cobalt content of at least 41% by weight and a cobalt surface area, after reduction, greater than 25 m2 per gram of total cobalt. The catalyst or precursor may be made by slurrying a transition alumina powder having a pore volume of at least 0.7 ml/g with an aqueous cobalt ammine carbonate complex and heating the slurry to decompose the complex.
    Type: Application
    Filed: November 19, 2002
    Publication date: June 26, 2003
    Applicant: Johnson Matthey PLC
    Inventors: Martinus C. Lok, Gordon J. Kelly, Gavin Gray