1
Jean C Dubois, Gilles Ravaux, Pierre Le Barny: Mesomorphic polymer material usable in non linear optics. Thomson-CSF, Oblon Spivak McClelland Maier & Neustadt, January 16, 1990: US04894263 (54 worldwide citation)

The invention relates to polymeric materials usable in non linear optics. The structure of the material of the invention includes a skeleton to which side chains are attached, the material resulting from the association of a first and a second monomer, the first monomer including a mesomorphogenic g ...


2
Pierre Le Barny, Jean C Dubois, Gilles Ravaux: Organic compound having a smectic A phase, mixture containing said compound and process for producing the same. Thomson-CSF, Oblon Fisher Spivak McClelland & Maier, September 30, 1986: US04614608 (17 worldwide citation)

The invention relates to a group of organic compounds of the 1-(4-hydroxyphenyl)-2-(4'-trifluoromethylphenyl)-ethane ester type having a mesomorphous phase of the smectic A type, to the mixtures obtained from said compounds, as well as to the process for producing the molecules of said group. The co ...


3
Pierre Le Barny, Jean Francois Lipskier: Electroluminescent screen. Thomson-CSF, September 23, 1994: FR2702870-A1 (14 worldwide citation)

The invention relates to an electroluminescent flat screen which associates an electroluminescent material emitting in the blue with, on the one hand, a photoluminescent material emitting in the red, on the other hand, a photoluminescent material emitting in the green, the emission of the red and gr ...


4
Laurent Bouteiller, Pierre Le Barny, Jean Pierre Vairon: Method for obtaining composite materials based on polymers and liquid crystals with dichroic dyes. Thomson-CSF, Oblon Spivak McClelland Maier & Neustadt, July 4, 1995: US05430563 (13 worldwide citation)

Disclosed is an original method for preparing composite materials for a display screen, these materials containing a polymer, liquid crystal and dye. The present problem is one of inserting molecules of dye into composites of this type. The disclosed method proposes the preparation, in a first step, ...


5
Sophie Muller, Pierre Le Barny, Dominique Broussoux: Reticulable polymer for applications in non-linear optics. Thomson-CSF, Oblon Spivak McClelland Maier & Neustadt, July 13, 1993: US05227444 (8 worldwide citation)

The invention concerns a reticulable polymer for use in non-linear optics, the polymer being constituted of a skeleton to which side chains are attached; one chain ensures the amorphous nature of the polymer, the skeleton consisting of polyacrylic, polystyrene or polysiloxane, and a second side chai ...


6
Dominique Broussoux, Jean Claude Dubois, Pierre Le Barny, Philippe Robin: Process for obtaining a structure generating non-linear electrooptical effects, structure obtained and applications thereof. Thomson-CSF, Oblon Spivak McClelland Maier & Neustadt, November 30, 1993: US05267076 (7 worldwide citation)

The invention relates to the obtaining of a structure generating non-linear electrooptical effects, the effects being due to molecules or inter-molecular groupings possessing a non-linear susceptibility and the orientation of the molecules or groupings being induced by an applied electric field. Acc ...


7
Jean C Dubois, Gilles Ravaux, Pierre Le Barny: Mesomorphic side-chain polymers having high dielectric anisotropy and a method for producing said polymers. Thomson-CSF, Oblon Fisher Spivak McClelland & Maier, January 5, 1988: US04717757 (6 worldwide citation)

The invention relates to a family of sidechain homopolymers of the polyacrylate type derived from 3-fluoro-4-cyanophenol and exhibiting a mesophase of the nematic or smectic-A type. The polymer in accordance with the invention corresponds to the following general chemical formula : ##STR1## where x ...


8
Jean Claude Dubois, Gilles Ravaux, Pierre Le Barny: Liquid crystals having a type A smectic phase. Thomson-CSF, Oblon Fisher Spivak McClelland & Maier, October 8, 1985: US04545921 (6 worldwide citation)

The invention relates to a group of organic compounds of the substituted 2-hydroxyfluorene ester type, which has a smectic A mesomorphous phase. The invention also relates to the process for producing molecules of this group.


9
Marie Vergnolle, Francoise Soyer, Pierre Le Barny, Jean Claude Dudois: Fluorinated liquid crystals. Thomson-CSF, Oblon Spivak McClelland Maier & Neustadt, March 29, 1994: US05298188 (3 worldwide citation)

The disclosure relates to fluorinated chiral liquid crystals that incorporate a cyclohexyl grouping in their structure. They can be used as dopants and lead to mixtures of ferroelectric liquid crystals that have an application in display systems. They meet the following chemical formula. ##STR1## wi ...


10
Jean C Dubois, Pierre Le Barny, Jean P Billard, Lydie Thirant, Serge Le Berre, Annie Beguin: Diphenyl benzoates and its use as a dopant for smectic liquid crystals. Thomson-CSF, Oblon Fisher Spivak McClelland & Maier, October 2, 1984: US04474679 (3 worldwide citation)

The invention relates to an organic compound obtained by synthesis from 3,5-dihydroxybenzoic acid. The compound according to the invention is in accordance with the following general formula: ##STR1## in which R stands for an organic group of the alkyl, alkoxy or alkyl carboxylate type having 1 to 1 ...