Patents by Inventor Nathalie Dessaud

Nathalie Dessaud 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 of producing a liquid crystal material that reflects more than 50% of non-polarised incident light
    Patent number: 7887892
    Abstract: The invention relates to a method of producing a liquid crystal material. The inventive method is characterised in that it comprises the following steps consisting in: applying a first treatment to a liquid crystal mixture having a helical structure comprising a first non-photoreactive liquid crystal (A) and a second photoreactive liquid crystal (B), said first treatment modifying a handedness of the helix of the mixture; and applying a second treatment to the mixture such that the second liquid crystal (B) forms a polymer network, said second treatment being performed during all or part of the first treatment such that the liquid crystal material retains a memory of the modifications to the helix and the entire volume of the material has both a right-handed and left-handed helical structure.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: February 15, 2011
    Assignee: Centre National de la Recherche Scientifique (CNRS)
    Inventors: Michel Mitov, Nathalie Dessaud
  • Method of Producing a Liquid Crystal Material that Reflects More than 50% of Non-Polarised Incident Light
    Publication number: 20090098313
    Abstract: The invention relates to a method of producing a liquid crystal material. The inventive method is characterised in that it comprises the following steps consisting in: applying a first treatment to a liquid crystal mixture having a helical structure comprising a first non-photoreactive liquid crystal (A) and a second photoreactive liquid crystal (B), said first treatment modifying a handedness of the helix of the mixture; and applying a second treatment to the mixture such that the second liquid crystal (B) forms a polymer network, said second treatment being performed during all or part of the first treatment such that the liquid crystal material retains a memory of the modifications to the helix and the entire volume of the material has both a right-handed and left-handed helical structure.
    Type: Application
    Filed: August 31, 2006
    Publication date: April 16, 2009
    Inventors: Michel Mitov, Nathalie Dessaud