Patents by Inventor Jean Grosbois
Jean Grosbois 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).
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Patent number: 5389298Abstract: Weakly acidic colloidal dispersions of cerium (IV) compounds in aqueous media, the colloidal solids of which having the general formula Ce(A).sub.x (NO.sub.3).sub.y (OH).sub.4-x-y, in which A is the anion of a water-soluble monovalent carboxylic acid having a pK.sub.a of from 2.5 to 5.0, are produced by (a) reacting and destabilizing an aqueous colloidal dispersion of a cerium (IV) compound with a water-soluble salt of such monovalent acid, (b) separating the precipitate which results, and (c) dispersing the precipitate thus separated in an aqueous medium, e.g., distilled water.Type: GrantFiled: March 3, 1993Date of Patent: February 14, 1995Assignee: Rhone-Poulenc ChimieInventor: Jean Grosbois
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Patent number: 4920204Abstract: Ceric hydrocarbyloxy nitrates having the general formula: ##STR1## are obtained by reaction of ceric ammonium nitrate with x moles of ammonia and an aliphatic, cycloaliphatic or aromatic alcohol having from two to twenty carbon atoms, and are useful in the preparation of ceric hydrocarbyl oxides difficult or expensive of access by other routes, and in synthesis of other organic ceric compounds.Type: GrantFiled: November 12, 1987Date of Patent: April 24, 1990Assignee: Rhone-Poulenc Inc.Inventors: Peter S. Gradeff, Fred G. Schreiber, Jean Grosbois, Heiko Mauermann
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Patent number: 4908108Abstract: Cerous 3.sup.30 values are converted into ceric 4.sup.+ values, in a conventional separator-free electrolytic cell, by emulsifying an organic phase containing a cerium 4.sup.+ extractant in an aqueous sulfuric phase which includes the cerium 3.sup.+ values to be converted; simultaneously electrolytically oxidizing the cerium 3.sup.+ values into cerium 4.sup.+ values in a zone of electrolysis including an anode and a cathode, whereby the cerium 4.sup.+ values formed are liquid/liquid extracted into the organic phase; separating the resulting emulsion into an aqueous phase and an organic phase enriched in cerium 4.sup.+ values; and recovering the enriched organic phase.Type: GrantFiled: March 9, 1989Date of Patent: March 13, 1990Assignee: Rhone-Poulenc ChimieInventors: Dominique Horbez, Alain Storck, Jean Grosbois
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Patent number: 4743349Abstract: Bonded, coherent fibrous web substrates well adopted as cathodic elements for electrolytic cells and advantageously incorporating an electrocatalytic agent, include a web matrix which comprises a plurality of fibers, at least a portion of which comprising electrically conductive fibers, e.g., carbon fibers, said plurality of fibers being coherently bonded together with a fluorine-containing polymer, and said web substrate having a resistivity of up to about 0.4 .OMEGA..cm.Type: GrantFiled: September 12, 1986Date of Patent: May 10, 1988Assignee: AtochemInventors: Jean Bachot, Jean Grosbois
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Patent number: 4617098Abstract: Lithium metal is continuously prepared by, in a specially adapted electrolytic cell, (i) continuously electrolyzing the lithium chloride which comprises a mixture of molten salts, which mixture comprises the medium of electrolysis and such medium of electrolysis naturally circulating within an interspace defined between the electrodes of the cell, said interspace being devoid of physical barrier between said electrodes, (ii) continuously withdrawing therefrom product lithium metal in admixture with the mixture of molten salts, and (iii) continuously discharging undiluted chlorine gas therefrom.Type: GrantFiled: October 16, 1985Date of Patent: October 14, 1986Assignee: Rhone-Poulenc Specialites ChimiquesInventors: Jean-Michel Verdier, Serge Jacubert, Jean Grosbois, Jean-Yves Dumousseau
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Patent number: 4605547Abstract: Lithium is continuously converted into lithium hydride, is suitable phase contactor/decanter apparatus, by continuously hydrogenating in a first reaction zone, at elevated temperatures, an agitated intimate admixture of metallic lithium in a mixture of molten salts, continuously discharging the effluent of said hydrogenation reaction to a second zone of decantation, whereby said effluent is separated into a floating light phase essentially consisting of unreacted lithium metal and a heavy phase which comprises product lithium hydride dissolved in said mixture of molten salts, continuously recycling floating light phase back to the hydrogenation reaction zone, continuously withdrawing heavy phase from said zone of decantation, and recovering product lithium hydride from said withdrawn heavy phase.Type: GrantFiled: March 1, 1985Date of Patent: August 12, 1986Assignee: Rhone-Poulenc Specialites ChimiquesInventors: Jean-Yves Dumousseau, Jean Grosbois, Serge Jacubert
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Patent number: 4601798Abstract: Silane, SiH.sub.Type: GrantFiled: August 30, 1983Date of Patent: July 22, 1986Assignee: Rhone-Poulenc Specialites ChimiquesInventors: Serge Jacubert, Jean Grosbois, Jean-Michel Verdier
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Patent number: 4539085Abstract: A porous diaphragm for an electrolytic cell enables, e.g., the electrolysis of NaCl to NaOH, in high concentration and in good yield, said diaphragm comprising an electrolytically acceptable porous sheet member having a total pore volume and average equivalent pore diameter adapted for electrolysis, and having an ion exchange resin fixedly deposited within the pores and occupying from 8 to 30% of the total pore volume thereof.Type: GrantFiled: December 6, 1983Date of Patent: September 3, 1985Assignee: Chloe ChimieInventors: Jean Bachot, Jean Grosbois
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Patent number: 4499063Abstract: Essentially pure silane, SiH.sub.Type: GrantFiled: September 27, 1983Date of Patent: February 12, 1985Assignee: Rhone-Poulenc Specialities ChimiquesInventors: Jean Grosbois, Serge Jacubert, Jean-Michel Verdier
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Patent number: 4454012Abstract: Crystalline methionine is prepared from an alkali metal methioninate by continuously electrolyzing an aqueous solution of the said alkali metal methioninate and a support electrolyte in an intermediate compartment of a cell comprising an anode compartment, an intermediate compartment containing the said aqueous solution and separated from the anode compartment by a cationic membrane, and a cathode compartment separated from the intermediate compartment by a cationic membrane, so that the alkali metal ions of the said methioninate are replaced by hydrogen ions generated in the anode compartment and themselves migrate to the cathode compartment to form an alkali metal hydroxide therein, and recovering free crystalline methionine from the electrolyzed aqueous solution in the said intermediate compartment, and alkali metal hydroxide from the said cathode compartment.Type: GrantFiled: April 21, 1983Date of Patent: June 12, 1984Assignee: Rhone-Poulenc IndustriesInventors: Jean Bachot, Jean Grosbois
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Patent number: 4435308Abstract: Aluminum hydroxychloride compositions characterized by the presence of SO.sub.4.sup.-2 anions and at least one anion of selected organic acids are disclosed, as well as their particular utility in the treatment of soft water.Type: GrantFiled: June 8, 1978Date of Patent: March 6, 1984Assignee: Rhone-Poulenc IndustriesInventors: Maryvonne Thomas, Jean Grosbois
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Patent number: 4432860Abstract: A porous diaphragm for an electrolytic cell enables, e.g., the electrolysis of NaCl to NaOH, in high concentration and in good yield, said diaphragm comprising an electrolytically acceptable porous sheet member having a total pore volume and average equivalent pore diameter adapted for electrolysis, and having an ion exchange resin fixedly deposited within the pores and occupying from 8 to 30% of the total pore volume thereof.Type: GrantFiled: May 14, 1982Date of Patent: February 21, 1984Assignee: Chloe ChimieInventors: Jean Bachot, Jean Grosbois
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Patent number: 4410638Abstract: A wettable microporous diaphragm for electrolysis having a base of a fluorinated resin is disclosed. This diaphragm is prepared by depositing a copolymer of an unsaturated carboxylic acid and a non-ionic unsaturated monomer in the pores of the diaphragm. The diaphragm is particularly useful for the electrolysis of alkali metal chlorides.Type: GrantFiled: May 14, 1982Date of Patent: October 18, 1983Assignee: Chloe ChimieInventors: Jean Bachot, Jean Grosbois
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Patent number: 4405591Abstract: Silane, a useful intermediate in the production of silicon, is facilely quantitatively prepared by hydrogenating chlorosilanes in a bath of molten salts, said molten bath comprising a ternary mixture of lithium chloride and two other metal chlorides, such two other metal chlorides being either two different alkaline earth metal chlorides, or one alkaline earth metal chloride and one alkali metal chloride, or two different alkali metal chlorides, and said ternary mixture having a melting point not in excess of about 400.degree. C.Type: GrantFiled: March 17, 1982Date of Patent: September 20, 1983Assignee: Rhone-Poulenc Specialites ChimiquesInventors: Jean Grosbois, Jean-Yves Dumousseau
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Patent number: 4374893Abstract: Textiles, preferably yarns and fibers, based on synthetic polymers, with permanent conducting properties, which possess, on the surface, a uniform continuous layer consisting of at least 3% of copper sulphide, the composition of which is such that the atomic ratio Cu/S is between 1.5 and 2, and preferably more than 1.7, and of which the ratio R/R.sub.o is between 1 and 10, R being the electrical resistance after treatment for 400 hours at 60.degree. C. and at a humidity of 70%, and R.sub.o being the initial resistance of the treated textile. The synthetic polymer is based on polyamide or polyester, or is an aromatic polyamide or a polyamide-imide. Processes for the manufacture of these textiles and textile articles with permanent conducting properties, such as floor/wall coverings, containing between 0.01 and 5% of the treated textiles, are also disclosed.Type: GrantFiled: June 26, 1981Date of Patent: February 22, 1983Assignee: Rhone-Poulenc-TextileInventors: Andre Arsac, Michel Ducarre, Jean Grosbois, Thomas Nener
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Patent number: 4351821Abstract: Gallium oxide, Ga.sub.2 O.sub.3, well adapted for the manufacture therefrom of garnets, luminophors, and the like, is prepared by (i) admixing, under stirring, a solution of a gallium salt with a base to convert said salt into gallium hydroxide, Ga(OH.sub.3 ; (ii) aging said gallium hydroxide reaction medium at elevated temperatures to effect precipitation therefrom of a gallium oxide/hydroxide fraction, GaO(OH); (iii) next filtering said gallium oxide/hydroxide fraction from said precipitation medium; (iv) drying and (v) calcining said filtered precipitate to convert same into said gallium oxide, Ga.sub.2 O.sub.3, with said oxide/hydroxide fraction (vi) being washed either before or after said filtration step (iii).Type: GrantFiled: June 16, 1981Date of Patent: September 28, 1982Assignee: Rhone-Poulenc IndustriesInventors: Bernard Boudot, Jean Grosbois, Michel Pajot
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Patent number: 4341615Abstract: A wettable microporous diaphragm for electrolysis having a base of a fluorinated resin is disclosed. This diaphragm is prepared by depositing a copolymer of an unsaturated carboxylic acid and a non-ionic unsaturated monomer in the pores of the diaphragm. The diaphragm is particularly useful for the electrolysis of alkali metal chlorides.Type: GrantFiled: January 21, 1981Date of Patent: July 27, 1982Assignee: Chloe ChimieInventors: Jean Bachot, Jean Grosbois
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Patent number: 4321244Abstract: A process for treating a rock essentially constituted by calcium aluminophosphate, comprising the treatment of the ground rock with a concentrated sulfuric acid in stoichiometric excess with respect to calcium and aluminum, at a temperature of above about 120.degree. C., for a time between a few minutes and about 5 hours, followed by controlled water take-up. Subsequently, a residue containing substantially all the calcium and the aluminum of the rock and a solution of the acids serving to digest a tricalciumphosphate charge are separated. The process is particularly suitable for the treatment of Thies phosphate ore.Type: GrantFiled: August 5, 1980Date of Patent: March 23, 1982Assignee: Groupement Franco-Senagalais d'Etudes et de Recherches IndustriellesInventors: Claude Magnier, Jean Grosbois
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Patent number: 4080278Abstract: A cathode for an electrolytic cell, providing a low overvoltage on contact with the electrolyte, having at least one surface of a compound comprising (a) a metal of the group comprising nickel, copper, iron and cobalt, and (b) another element of the group comprising any of the preceding metals, titanium, lanthanides, magnesium, boron, molybdenum, manganese, vanadium, niobium and tantalum and their hydrogenation products. The cathode is particularly useful in the electrolysis of alkali chlorides.Type: GrantFiled: July 6, 1976Date of Patent: March 21, 1978Assignee: Rhone-Poulenc IndustriesInventors: Dominique Ravier, Jean Grosbois
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Patent number: RE34233Abstract: Bonded, coherent fibrous web substrates well adopted as cathodic elements for electrolytic cells and advantageously incorporating an electrocatalytic agent, include a web matrix which comprises a plurality of fibers, at least a portion of which comprising electrically conductive fibers, e.g., carbon fibers, said plurality of fibers being coherently bonded together with a fluorine-containing polymer, and said web substrate having a resistivity of up to about .[.0.4.]. .Iadd.4.0 .Iaddend..OMEGA..cm.Type: GrantFiled: May 9, 1990Date of Patent: April 27, 1993Assignee: AtochemInventors: Jean Bachot, Jean Grosbois