Patents by Inventor Patrick Leghie

Patrick Leghie 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).

  • Ultramarine pigment synthesis process
    Patent number: 7632347
    Abstract: The present invention relates to an ultramarine pigment synthesis process which includes a calcination step in the absence of air of a mixture including zeolite A, possibly sodium sulfide and/or sulfur, possibly hydroxide ions, and polysulfides of composition Na2Sn, n being a number greater than 1, the product resulting from the calcination reaction being cooled in the absence of air, leading to obtaining a raw product which includes the synthesized ultramarine pigment, polysulfides and possibly sulfur. The Na2Sn polysulfides taking part in the calcination reaction come at least in part from the recycling of the polysulfides and possibly of the sulfur present in excess in the aforesaid raw product.
    Type: Grant
    Filed: May 9, 2005
    Date of Patent: December 15, 2009
    Assignee: Holliday Pigments SA
    Inventors: Jean-Pierre V. Lelieur, Christian L. Duhayon, Noëlle S. Hautecoeur, Antoine M. Demortier, Bertrand J. Lede, Patrice J. Coopman, Patrick Leghie
  • Ultramarine Pigment Synthesis Process
    Publication number: 20080257219
    Abstract: The present invention relates to an ultramarine pigment synthesis process which includes a calcination step in the absence of air of a mixture including zeolite A, possibly sodium sulfide and/or sulfur, possibly hydroxide ions, and polysulfides of composition Na2Sn, n being a number greater than 1, the product resulting from the calcination reaction being cooled in the absence of air, leading to obtaining a raw product which includes the synthesized ultramarine pigment, polysulfides and possibly sulfur. The Na2Sn polysulfides taking part in the calcination reaction come at least in part from the recycling of the polysulfides and possibly of the sulfur present in excess in the aforesaid raw product.
    Type: Application
    Filed: May 9, 2005
    Publication date: October 23, 2008
    Inventors: Jean-Pierre V. Lelieur, Christian L. Duhayon, Noelle S. Hautecoeur, Antoine M. Demortier, Bertrand J. Lede, Patrice J. Coopman, Patrick Leghie