Patents by Inventor Robert A. Shatwell

Robert A. Shatwell 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).

  • Method and apparatus for the production of carbon nanostructures
    Publication number: 20050152826
    Abstract: A method and apparatus for the continuous production of carbon nanostructures so as to improve their quality and quantity. Such structures have potential application as hydrogen storage means in new energy sources. The carbon nanostructures (20) are grown in a continuous or semi-continuous manner on a continuous, elongate, heated substrate (15) to form a coated substrate the process involving movement of the substrate through one or more deposition chambers (2,3). The substrate may be an electrically heated wire (15).
    Type: Application
    Filed: February 17, 2003
    Publication date: July 14, 2005
    Inventor: Robert Shatwell
  • Coated filaments
    Patent number: 5571561
    Abstract: A ceramic filament comprising a tungsten core and an outer layer of silicon carbide, the tungsten core and the outer layer being separated by an intermediate layer of titanium carbide. Also claimed is a process for the deposition of a titanium carbide coating on a tungsten filament which comprises heating the filament and passing the heated filament through a deposition chamber containing gases which on contact with the hot filament deposit the coating, the gases comprising a hydrocarbon and a titanium halogenated compound, said titanium halogenated compound contacting the tungsten filament before the hydrocarbon.
    Type: Grant
    Filed: October 19, 1993
    Date of Patent: November 5, 1996
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Yann LePetitcorps, Robert A. Shatwell
  • Apparatus for depositing a ceramic coating on a filament
    Patent number: 5221353
    Abstract: A process for depositing a ceramic coating on a filament, which comprises heating the filament by passage of an electric current via at least two electrodes, and passing the heated filament through a deposition chamber containing gases which on contact with the hot filament deposit the required coating; characterized in that after deposition of the coating, the coated filament passes through an electrode containing a liquid metal mixture which is a mercury/indium or mercury/cadmium amalgam or a gallium/indium mixture.
    Type: Grant
    Filed: July 24, 1992
    Date of Patent: June 22, 1993
    Assignee: The British Petroleum Company
    Inventors: Philip Gruber, Ashleigh M. Kewney, Robert A. Shatwell
  • Process for depositing a ceramic coating on a filament
    Patent number: 5156883
    Abstract: A process for depositing a ceramic coating on a filament, which comprises heating the filament by passage of an electric current via at least two electrodes, and passing the heated filament through a deposition chamber containing games which on contact with the hot filament deposit the required coating; characterized in that after deposition of the coating, the coated filament passes through an electrode containing a liquid metal mixture which is a mercury/indium or mercury/cadmium amalgam or a gallium/indium mixture.
    Type: Grant
    Filed: July 2, 1991
    Date of Patent: October 20, 1992
    Assignee: The British Petroleum Company P.L.C.
    Inventors: Philip Gruber, Ashleigh M. Kewney, Robert A. Shatwell