Patents by Inventor Robert Cantiani
Robert Cantiani 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: 7078198Abstract: The present invention relates to a heteropolysaccharide (HP) characterized in that it can be obtained by fermentation of a medium comprising at least one strain of Pseudomonas sp I-2054 (or DSM 12295), one of the recombinants thereof or the mutants thereof and a source of carbon which can be assimilated by said strain, one of the recombinants thereof or one of the mutants thereof. The invention also relates to a method for the production and use of said heteropolysaccharide as a thickening agent and/or gelling agent.Type: GrantFiled: April 10, 2000Date of Patent: July 18, 2006Assignee: Rhodia ChimieInventors: Sophie Vaslin, Alain Senechal, Paule Chevallereau, Jean-Luc Simon, Robert Cantiani
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Patent number: 6881780Abstract: A polyacrylate ester, and more particularly a polymethacrylate ester based dispersant-viscosity improver for lubricating oil compositions. Specifically, the dispersant viscosity improvers of this invention are nitrogen-containing copolymers comprising units derived from (A) from about 5% to about 75% by weight of alkyl acrylate ester monomers containing from 2 to 11 carbon atoms in the alkyl group; (B) from about 25% to about 95% by weight of alkyl acrylate ester monomers containing from 12 to about 24 carbon atoms in the alkyl group; and (C) From about 0.1% to about 20% by weight of at least one nitrogen containing monomer selected from the group consisting of vinyl substituted nitrogen heterocyclic monomers, N,N-dialkylaminoalkyl acrylate monomers, N,N-dialkylaminoalkyl acrylamide monomers and tertiary-alkyl acrylamides, provided that the total equals 100%. Processes for preparing the compositions, additive concentrates and lubricating oil compositions are described.Type: GrantFiled: August 7, 2001Date of Patent: April 19, 2005Assignee: The Lubrizol CorporationInventors: Charles P. Bryant, Bryan A. Grisso, Robert Cantiani
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Patent number: 6703497Abstract: The invention concerns cellulose microfibrils with modified surface, characterised in that the hydroxyl functions present at the surface of the microfibrils are etherified with at least an organic compound comprising at least a function capable of reacting with said hydroxyl functions, and the degree of surface substitution (DSs) is at least 0.05. The invention also concerns a method for obtaining said microfibrils and their use as agent for modifying viscosity, texture and/or as reinforcing filler.Type: GrantFiled: June 25, 2001Date of Patent: March 9, 2004Assignee: Rhodia ChimieInventors: Laurence Ladouce, Etienne Fleury, Cécile Gousse, Robert Cantiani, Henri Chanzy, Gérard Excoffier
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Patent number: 6509176Abstract: The invention concerns a heteropolysaccharide (HP) characterised in that it is obtainable by fermenting in a medium comprising at least an Agrobacterium radiobacter I-2001 (or DSM 12095) strain, one of its recombinants, or one of its mutants, and a carbon source capable of being assimilated by said strain, one of its recombinants or one of its mutants. The invention also concerns a method for preparing said heteropolysaccharide and its use as thickening and/or gelling agent.Type: GrantFiled: June 25, 2001Date of Patent: January 21, 2003Assignee: Rhodia ChimieInventors: Robert Cantiani, Alain Senechal, Sophie Vaslin, Paule Chevallereau, Jean-Luc Simon
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Patent number: 6485767Abstract: The invention concerns the use, in dry form, of a combination of substantially amorphous microfibrils with a crystallinity index not more than 50%, with at least a polyhydroxylated compound, as additive for food formulations, the content of this combination being more than 0% and less than 20% by weight relative to the total weight of the food formulation.Type: GrantFiled: August 15, 2000Date of Patent: November 26, 2002Assignee: Rhodia ChimieInventors: Robert Cantiani, Magali Knipper, Sophie Vaslin
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Publication number: 20020032293Abstract: A polyacrylate ester, and more particularly a polymethacrylate ester based dispersant-viscosity improver for lubricating oil compositions.Type: ApplicationFiled: August 7, 2001Publication date: March 14, 2002Inventors: Charles P. Bryant, Bryan A. Grisso, Robert Cantiani
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Patent number: 6348436Abstract: The present invention relates to a drilling fluid comprising cellulose nanofibrils comprising at least 80% of cells with primary walls and charged with carboxylic acids and with acidic polysaccharides, alone or as a mixture. This additive, alone, gives the drilling fluid shear-thinning properties and is stable up to temperatures of about 180° C.Type: GrantFiled: May 14, 1999Date of Patent: February 19, 2002Assignee: Rhodia ChimieInventors: Bruno Langlois, Joël Benchimol, Gilles Guerin, Isabelle Vincent, Alain Senechal, Robert Cantiani
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Patent number: 6312669Abstract: The invention concerns buccodental formulation characterized in that it comprises at least a thickening agent comprising cellulose nanofibrils, said cellulose nanofibrils being substantially amorphous, having a crystallinity index not more than 50%. The invention also concerns said cellulose nanofibrils as thickening agent and/or flavour enhancer in buccodental formulations.Type: GrantFiled: May 16, 2000Date of Patent: November 6, 2001Assignee: Rhodia ChimieInventors: Robert Cantiani, Claudie Willemin
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Patent number: 6306207Abstract: The present invention relates to compositions comprising essentially amorphous cellulose nanofibrils, at least one additive chosen from carboxycellulose with a degree of substitution of more than 0.95, a natural polysaccharide, a polyol, and optionally at least one co-additive, the content of additive and of optional co-additive being less than or equal to 30% by weight relative to the weight of nanofibrils and of additive and of optional co-additive. Similarly, a subject of the invention is a process for preparing such compositions, which consists in adding the additive and the optional co-additive to a suspension of essentially amorphous nanofibrils, and then in drying the suspension thus supplemented. The compositions obtained are readily redispersable and conserve their initial rheological properties.Type: GrantFiled: February 14, 2001Date of Patent: October 23, 2001Assignee: Rhodia ChimieInventors: Robert Cantiani, Gilles Guerin, Alain Senechal, Isabelle Vincent, Joël Benchimol
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Patent number: 6294628Abstract: A polyacrylate ester, and more particularly a polymethacrylate ester based dispersant-viscosity improver for lubricating oil compositions. Specifically, the dispersant viscosity improvers of this invention are nitrogen-containing copolymers comprising units derived from (A) from about 5% to about 75% by weight of alkyl acrylate ester monomers containing from 1 to 11 carbon atoms in the alkyl group; (B) from about 25% to about 95% by weight of alkyl acrylate ester monomers containing from 12 to about 24 carbon atoms in the alkyl group; and (C) from about 0.1% to about 20% by weight of at least one nitrogen containing monomer selected from the group consisting of vinyl substituted nitrogen heterocyclic monomers, N,N-dialkylaminoalkyl acrylate monomers, N,N-dialkylaminoalkyl acrylamide monomers and tertiary-alkyl acrylamides, provided that the total equals 100%. Processes for preparing the compositions, additive concentrates and lubricating oil compositions are described.Type: GrantFiled: May 14, 1999Date of Patent: September 25, 2001Assignee: The Lubrizol CorporationInventors: Charles P. Bryant, Bryan A. Grisso, Robert Cantiani
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Publication number: 20010011516Abstract: The invention concerns compositions containing essentially amorphous cellulose nanofibrils, carboxyl cellulose with a degree of substitution not more than o.95 as additive, and optionally at least one co-additive, the content in additive and optional co-additive being less than 30 wt. % relative to the weight of nanofibrils and additive and optional co-additive. The invention also concerns a method for preparing such compositions, consistin in adding to a substantially amorphous nanofibril suspension, the additive and optionally the co-additive(s), then in drying the suspension thus additivated. The resulting compositions are easily redispersable and preserve all their rheological properties.Type: ApplicationFiled: February 14, 2001Publication date: August 9, 2001Inventors: Robert Cantiani, Gilles Guerin, Alain Senechal, Isabelle Vincent, Joel Benchimol
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Publication number: 20010004869Abstract: The present invention relates to compositions comprising essentially amorphous cellulose nanofibrils, at least one additive chosen from carboxycellulose with a degree of substitution of more than 0.95, a natural polysaccharide, a polyol, and optionally at least one co-additive, the content of additive and of optional co-additive being less than or equal to 30% by weight relative to the weight of nanofibrils and of additive and of optional co-additive. Similarly, a subject of the invention is a process for preparing such compositions, which consists in adding the additive and the optional co-additive to a suspension of essentially amorphous nanofibrils, and then in drying the suspension thus supplemented. The compositions obtained are readily redispersable and conserve their initial Theological properties.Type: ApplicationFiled: February 14, 2001Publication date: June 28, 2001Inventors: Robert Cantiani, Gilles Guerin, Alain Senechal, Isabelle Vincent, Joel Benchimol
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Patent number: 6231657Abstract: The invention concerns compositions containing essentially amorphous cellulose nanofibrils, carboxyl cellulose with a degree of substitution not more than o.95 as additive, and optionally at least one co-additive, the content in additive and optional co-additive being less than 30 wt. % relative to the weight of nanofibrils and additive and optional co-additive. The invention also concerns a method for preparing such compositions, consisting in adding to a substantially amorphous nanofibril suspension, the additive and optionally the co-additive(s), then in drying the suspension thus additivated. The resulting compositions are easily redispersable and preserve all their rheological properties.Type: GrantFiled: May 7, 1999Date of Patent: May 15, 2001Assignee: Rhodia ChimieInventors: Robert Cantiani, Gilles Guerin, Alain Senechal, Isabelle Vincent, Joël Benchimol
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Patent number: 6224663Abstract: The present invention relates to compositions comprising essentially amorphous cellulose nanofibrils, at least one additive chosen from carboxycellulose with a degree of substitution of more than 0.95, a natural polysaccharide, a polyol, and optionally at least one co-additive, the content of additive and of optional co-additive being less than or equal to 30% by weight relative to the weight of nanofibrils and of additive and of optional co-additive. Similarly, a subject of the invention is a process for preparing such compositions, which consists in adding the additive and the optional co-additive to a suspension of essentially amorphous nanofibrils, and then in drying the suspension thus supplemented. The compositions obtained are redily redispersable and conserve their initial rheological properties.Type: GrantFiled: September 8, 1999Date of Patent: May 1, 2001Assignee: Rhodia ChimieInventors: Robert Cantiani, Gilles Guerin, Alain Senechal, Isabelle Vincent, Joël Benchimol
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Patent number: 5969068Abstract: A polyacrylate ester, and more particularly a polymethacrylate ester based dispersant-viscosity improver for lubricating oil compositions. Specifically, the dispersant viscosity improvers of this invention are nitrogen-containing copolymers comprising units derived from(A) from about 5% to about 75% by weight of alkyl acrylate ester monomers containing from 1 to 11 carbon atoms in the alkyl group;(B) from about 25% to about 95% by weight of alkyl acrylate ester monomers containing from 12 to about 24 carbon atoms in the alkyl group; and(C) From about 0.1% to about 20% by weight of at least one nitrogen containing monomer selected from the group consisting of vinyl substituted nitrogen heterocyclic monomers, N,N-dialkylaminoalkyl acrylate monomers, N,N-dialkylaminoalkyl acrylamide monomers and tertiary-alkyl acrylamides, provided that the total equals 100%. Processes for preparing the compositions, additive concentrates and lubricating oil compositions are described.Type: GrantFiled: June 19, 1995Date of Patent: October 19, 1999Assignee: The Lubrizol CorporationInventors: Charles P. Bryant, Bryan A. Grisso, Robert Cantiani
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Patent number: 5534175Abstract: Copolymers of unsaturated fatty esters capable of being obtained by copolymerization in a mineral oil of a percentage a) of an ester of a carboxylic acid A.sub.1, of a percentage b) of an ester of a carboxylic acid A.sub.2 and a percentage c) of an ester of a carboxylic acid A.sub.3, wherein a), is between 12 and 20%, c) is between 14 and 30% and b), which is preferably 72 and 45%, is such that a)+b)+c)=100%. The copolymers in accordance with the invention are reemployed as viscosity improver in lubricating oils.Type: GrantFiled: November 11, 1994Date of Patent: July 9, 1996Assignee: The Lubrizol CorporationInventor: Robert Cantiani