Patents by Inventor Timothy Neil Pritchard

Timothy Neil Pritchard 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).

  • Porous amorphous silica-alumina refractory oxides, their preparation and use as separation membranes
    Patent number: 6042727
    Abstract: A process for preparing a porous amorphous silica-alumina refractory oxide is described in which a source of silica, such as tetra ethyl ortho silicate, in a non-aqueous solvent, such as an alcohol, is hydrolysed by adding an aqueous solution containing aluminum ions, in particular a solution of aluminum nitrate, thereby to form a sol and calcining the sol at, for example, 200.degree. C. to 600.degree. C. The product, which may have a microporous or mesoporous structure, is useful in the separation of fluids, especially the separation of carbon dioxide from natural gas.
    Type: Grant
    Filed: August 25, 1998
    Date of Patent: March 28, 2000
    Assignee: British Gas plc
    Inventors: Stephen David Jones, Timothy Neil Pritchard
  • Porous amorphous silica-alumina refractory oxides, their preparation and use as separation membranes
    Patent number: 5871646
    Abstract: A process for preparing a porous amorphous silica-alumina refractory oxide is described in which a source of silica, such as tetra ethyl ortho silicate, in a non-aqueous solvent, such as an alcohol, is hydrolysed by adding an aqueous solution containing aluminum ions, in particular a solution of aluminum nitrate, thereby to form a sol and calcining the sol at, for example, 200.degree. C. to 600.degree. C. The product, which may have a microporous or mesoporous structure, is useful in the separation of fluids, especially the separation of carbon dioxide from natural gas.
    Type: Grant
    Filed: July 18, 1997
    Date of Patent: February 16, 1999
    Assignee: British Gas plc
    Inventors: Stephen David Jones, Timothy Neil Pritchard