Patents by Inventor Philip Maurice Martineau

Philip Maurice Martineau 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).

  • Optical quality diamond material
    Publication number: 20040229464
    Abstract: A CVD single crystal diamond material suitable for use in, or as, an optical device or element. It is suitable for use in a wide range of optical applications such as, for example, optical windows, laser windows, optical reflectors, optical refractors and gratings, and etalons. The CVD diamond material is produced by a CVD method in the presence of a controlled low level of nitrogen to control the development of crystal defects and thus achieve a diamond material having key characteristics for optical applications.
    Type: Application
    Filed: November 21, 2003
    Publication date: November 18, 2004
    Inventors: Herman Philip Godfried, Geoffrey Alan Scarsbrook, Daniel James Twitchen, Evert Pieter Houwman, Wilhelmus Gertruda Maria Nelissen, Andrew John Whitehead, Clive Edward Hall, Philip Maurice Martineau
  • Single crystal diamond prepared by CVD
    Publication number: 20040221795
    Abstract: A single crystal diamond prepared by CVD and having one or more electronic characteristics; making the diamond suitable for electronic applications. Also provided is a method of making the single crystal CVD diamond.
    Type: Application
    Filed: February 13, 2004
    Publication date: November 11, 2004
    Inventors: Geoffrey Alan Scarsbrook, Philip Maurice Martineau, John Lloyd Collins, Ricardo Simon Sussmann, Barbel Susanne Charlotte Dorn, Andrew John Whitehead, Daniel James Twitchen
  • Coloured diamond
    Publication number: 20040194690
    Abstract: A diamond layer of single crystal CVD diamond which is coloured, preferably which has a fancy colour, and which has a thickness of greater than 1 mm.
    Type: Application
    Filed: September 5, 2003
    Publication date: October 7, 2004
    Inventors: Daniel James Twitchen, Philip Maurice Martineau, Geoffrey Alan Scarsbrook, Baerbel Susanne Charlotte Dorn, Michael Andrew Cooper
  • Thick single crystal diamond layer method for making it and gemstones produced from the layer
    Publication number: 20040182308
    Abstract: This invention relates to diamond and more particularly to diamond produced by chemical vapour deposition (hereinafter referred to as CVD). According to a first aspect of the invention, there is provided a layer of single crystal CVD diamond of high quality having a thickness of at least 2 mm.
    Type: Application
    Filed: December 19, 2003
    Publication date: September 23, 2004
    Applicant: DE BEERS INDUSTRIAL DIAMONDS (PROPRIETARY) LIMITED
    Inventors: Geoffrey Alan Scarsbrook, Philip Maurice Martineau, Barbel Susanne Charlotte Dorn, Michael Andrew Cooper, John Lloyd Collins, Andrew John Whitehead, Daniel James Twitchen, Ricardo Simon Sussmann
  • Boron doped diamond
    Publication number: 20040180205
    Abstract: A layer of single crystal boron doped diamond produced by CVD and having a total boron concentration which is uniform. The layer is formed from a single growth sector, or has a thickness exceeding 100 &mgr;m, or has a volume exceeding 1 mm3, or a combination of such characteristics.
    Type: Application
    Filed: September 3, 2003
    Publication date: September 16, 2004
    Inventors: Geoffrey Alan Scarsbrook, Philip Maurice Martineau, Daniel James Twitchen, Andrew John Whitehead, Michael Andrew Cooper, Barbel Susanne Charlotte Dorn
  • Single crystal diamond
    Publication number: 20040177803
    Abstract: A method of producing a large area plate of single crystal diamond from CVD diamond grown on a substrate substantially free of surface defects by chemical vapour deposition (CVD). The homoepitaxial CVD grown diamond and the substrate are severed transverse to the surface of the substrate on which diamond growth took place to produce the large area plate of single crystal CVD diamond.
    Type: Application
    Filed: September 22, 2003
    Publication date: September 16, 2004
    Inventors: Geoffrey Alan Scarsbrook, Philip Maurice Martineau, Daniel James Twitchen
  • Coloured diamond
    Publication number: 20040175499
    Abstract: A method of producing a single crystal CVD diamond of a desired colour which includes the steps of providing single crystal CVD diamond which is coloured and heat treating the diamond under conditions suitable to produce the desired colour. Colours which may be produced are, for example, in the pink-green range.
    Type: Application
    Filed: September 5, 2003
    Publication date: September 9, 2004
    Inventors: Daniel James Twitchen, Philip Maurice Martineau, Geoffrey Alan Scarsbrook
  • Examining a diamond
    Patent number: 6014208
    Abstract: In order to test whether a diamond has had a layer of synthetic diamond deposited thereon, it is irradiated with high energy ultraviolet radiation to cause emission of luminescence, the luminescence intensity produced by different zones of the diamond being measured and compared. In one embodiment an integrating enclosure (15) is used and the diamond (13) is mounted on a rotatable mount (14).
    Type: Grant
    Filed: March 27, 1998
    Date of Patent: January 11, 2000
    Assignee: Gersan Establishment
    Inventors: Christopher Mark Welbourn, Martin Phillip Smith, James Gordon Charters Smith, Paul Martyn Spear, Philip Maurice Martineau, Martin Cooper
  • Examining a diamond
    Patent number: 5880504
    Abstract: In order to test whether a diamond has had a layer of synthetic diamond deposited thereon, the surface area of the natural part of the stone is measured by measuring the radiant-flux density of radiation substantially of wavelength 230 nm to 320 nm in an integrating sphere containing the diamond. This is compared to the total surface area of the diamond.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: March 9, 1999
    Assignee: Gersan Establishment
    Inventors: Martin Phillip Smith, James Gordon Charters Smith, Martin Cooper, Christopher Mark Welbourn, Philip Maurice Martineau