Patents by Inventor John Henry Sambell

John Henry Sambell 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).

  • Coating of a polymer layer using low power pulsed plasma in a plasma chamber of a large volume
    Patent number: 8389070
    Abstract: A method for depositing a polymeric material onto a substrate, said method comprising introducing an organic monomeric material in a gaseous state into a plasma deposition chamber, igniting a glow discharge within said chamber, and applying a high frequency voltage as a pulsed field, at a power of from 0.001 to 500 w/m3 for a sufficient period of time to allow a polymeric layer to form on the surface of the substrate. The method is particularly suitable for producing oil and water repellent coatings, in particular where the monomeric material contains haloalkyl compounds. Apparatus particularly adapted to carry out the method of the invention is also described and claimed.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: March 5, 2013
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Stephen Richard Coulson, Ian Burnett, John Henry Sambell
  • Coating of a Polymer Layer Using Low Powder Pulsed Plasma in a Plasma Chamber of a Large Volume
    Publication number: 20080260965
    Abstract: A method for depositing a polymeric material onto a substrate, said method comprising introducing an organic monomeric material in a gaseous state into a plasma deposition chamber, igniting a glow discharge within said chamber, and applying a high frequency voltage as a pulsed field, at a power of from 0.001 to 500 w/m3 for a sufficient period of time to allow a polymeric layer to form on the surface of the substrate. The method is particularly suitable for producing oil and water repellent coatings, in particular where the monomeric material contains haloalkyl compounds. Apparatus particularly adapted to carry out the method of the invention is also described and claimed.
    Type: Application
    Filed: March 18, 2005
    Publication date: October 23, 2008
    Inventors: Stephen Richard Coulson, Ian Burnett, John Henry Sambell