Patents by Inventor Pierre-Henri Jezequel
Pierre-Henri Jezequel 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: 10538462Abstract: A method for the continuous production of a mineral foam of which the density in the dry state (d) is from 40 to 600 kg/m3, includes (i) mixing cement; a water reducing agent; 0.5 to 10%, % by weight with respect to the total weight of cement, of ultrafine particles having a liquid-solid contact angle comprised from 30° to 140°, and of which the D50 is from 10 to 600 nm; water, with a water/cement weight ratio from 0.3 to 2.5; (ii) adding to the mixture from 0.5 to 10% of a pore-forming agent, % by weight with respect to the weight of cement; (iii) applying the mixture obtained at step (ii) on a support; (iv) leaving the mixture to expand on the support.Type: GrantFiled: December 18, 2015Date of Patent: January 21, 2020Assignee: HOLCIM TECHNOLOGY LTDInventors: Freddy Bernard, Pierre-Henri Jezequel, Sandrine Reboussin
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Publication number: 20190194072Abstract: A method of placing a flowable construction material including a hydraulic binder for building structural components layer-by-layer, such as for 3D concrete printing, the method including preparing a fresh flowable construction material made of Portland cement, fine limestone filler materials, fine sands, water, and water reducing admixture and possibly a set or hardening accelerating admixture, conveying the flowable construction material to a deposition head, placing the construction material through an outlet of the deposition head in order to form a layer of construction material, before placing the construction material, adding a rheology-modifying agent to the construction material so that the placed material has an increased yield stress when compared to the material during the conveying step.Type: ApplicationFiled: June 2, 2017Publication date: June 27, 2019Applicant: HOLCIM TECHNOLOGY LTDInventors: Vivien ESNAULT, Pierre-Henri JEZEQUEL, Fabrice TOUSSAINT, Abdellaziz LABYAD
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Publication number: 20170349498Abstract: A method for the continuous production of a mineral foam of which the density in the dry state (d) is from 40 to 600 kg/m3, includes (i) mixing cement; a water reducing agent; 0.5 to 10%, % by weight with respect to the total weight of cement, of ultrafine particles having a liquid-solid contact angle comprised from 30° to 140°, and of which the D50 is from 10 to 600 nm; water, with a water/cement weight ratio from 0.3 to 2.5; (ii) adding to the mixture from 0.5 to 10% of a pore-forming agent, % by weight with respect to the weight of cement; (iii) applying the mixture obtained at step (ii) on a support; (iv) leaving the mixture to expand on the support.Type: ApplicationFiled: December 18, 2015Publication date: December 7, 2017Inventors: Freddy BERNARD, Pierre-Henri JEZEQUEL, Sandrine REBOUSSIN
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Publication number: 20160318815Abstract: A process of making a sound-absorbing panel, including a. pre-mixing gypsum plaster with water; b. adding a glycoside compound; c. injecting air into the obtained slurry of step b) and mixing; d. casting the aerated slurry; e. setting the cast slurry.Type: ApplicationFiled: February 1, 2016Publication date: November 3, 2016Inventors: Philippe THOUILLEUX, Claude STOCK, Florence YZIQUEL, Pierre-Henri JEZEQUEL
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Patent number: 8808449Abstract: A foamed concrete having a density from 100 to 800 kg/m3 including by mass relative to the total mass of the concrete: a cement; water; from 0.01 to 5% of a water-reducing agent, plasticizer or superplasticizer; from 0.45 to 5% of a foaming agent relative to the amount of water; from 0.01 to 5% of a water-soluble calcium salt; inorganic particles from 0.1 to 300 ?m in size; the ratio of foaming agent to calcium salt being from 0.3 to 0.8; the foamed concrete including 10% or more by mass of slag.Type: GrantFiled: February 16, 2011Date of Patent: August 19, 2014Assignee: LafargeInventors: Pierre-Henri Jezequel, Benoit Mathonier
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Patent number: 8801851Abstract: A foamed concrete having a density from 100 to 800 kg/m3 including by mass relative to the total mass of the concrete: a cement; water; from 0.01 to 5% of a water-reducing agent, plasticizer or superplasticizer; from 0.45 to 5% of a foaming agent relative to the amount of water; from 0.01 to 5% of a water-soluble calcium salt; inorganic particles from 0.1 to 300 ?m in size; the ratio of foaming agent to calcium salt being from 0.3 to 0.8; excluding foamed concretes including 10% or more by mass of slag.Type: GrantFiled: February 16, 2011Date of Patent: August 12, 2014Assignee: LafargeInventors: Pierre-Henri Jezequel, Benoit Mathonier
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Publication number: 20120318171Abstract: A foamed concrete having a density from 100 to 800 kg/m3 including by mass relative to the total mass of the concrete: a cement; water; from 0.01 to 5% of a water-reducing agent, plasticizer or superplasticizer; from 0.45 to 5% of a foaming agent relative to the amount of water; from 0.01 to 5% of a water-soluble calcium salt; inorganic particles from 0.1 to 300 ?m in size; the ratio of foaming agent to calcium salt being from 0.3 to 0.8; the foamed concrete including 10% or more by mass of slag.Type: ApplicationFiled: February 16, 2011Publication date: December 20, 2012Applicant: LAFARGEInventors: Pierre-Henri Jezequel, Benoit Mathonier
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Publication number: 20120312193Abstract: A foamed concrete having a density from 100 to 800 kg/m3 including by mass relative to the total mass of the concrete: a cement; water; from 0.01 to 5% of a water-reducing agent, plasticizer or superplasticizer; from 0.45 to 5% of a foaming agent relative to the amount of water; from 0.01 to 5% of a water-soluble calcium salt; inorganic particles from 0.1 to 300 ?m in size; the ratio of foaming agent to calcium salt being from 0.3 to 0.8; excluding foamed concretes including 10% or more by mass of slag.Type: ApplicationFiled: February 16, 2011Publication date: December 13, 2012Applicant: LAFARGEInventors: Pierre-Henri Jezequel, Benoit Mathonier
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Publication number: 20100272983Abstract: A composition includes a set hydraulic binder; and a foaming agent and has a porosity ?0.55; a flow resistivity between 10000 and 200000 N.s.m-4; a tortuosity between 1.2 and 3.4; a viscous characteristic length between 10 ?m and 60 ?m; a thermal characteristic length between 60 ?m and 1000 ?m; and a compressive strength of at least 0.30 MPa as measured by modified ASTM C472.Type: ApplicationFiled: December 9, 2008Publication date: October 28, 2010Applicant: Lafarge PlatresInventors: Philippe Thouilleux, Claude Stock, Florence Yziquel, Pierre-Henri Jezequel
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Patent number: 6656675Abstract: A method for the preparation of silver haloiodide photographic emulsions, in particular the preparation of tabular grains haloiodide photographic emulsions. The method comprises the steps of adding pulsed jets of iodide salt and silver salt to a host emulsion.Type: GrantFiled: June 28, 2002Date of Patent: December 2, 2003Assignee: Eastman Kodak CompanyInventors: Pierre-Henri Jezequel, Bruno C. Barillon
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Patent number: 6638703Abstract: The invention relates to a method for preparing photographic silver halide tabular grains emulsions. The method of the invention comprises a first single nucleation step wherein stable tabular seeds of silver halide are formed, and a second step wherein different batches of seeds obtained in the first step are grown to yield identical or different emulsions. This combination of steps represent a robust process for preparing tabular grain emulsions at different scales.Type: GrantFiled: November 9, 2001Date of Patent: October 28, 2003Assignee: Eastman Kodak CompanyInventors: Pierre-Henri Jezequel, Bruno C. Barillon, Christian S. Schmuckle
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Publication number: 20030013052Abstract: A method for the preparation of silver haloiodide photographic emulsions, in particular the preparation of tabular grains haloiodide photographic emulsions. The method comprises the steps of adding pulsed jets of iodide salt and silver salt to a host emulsion.Type: ApplicationFiled: June 28, 2002Publication date: January 16, 2003Applicant: Eastman Kodak CompanyInventors: Pierre-Henri Jezequel, Bruno Christian Barillon
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Publication number: 20020068249Abstract: The invention relates to a method for preparing photographic silver halide tabular grains emulsions. The method of the invention comprises a first single nucleation step wherein stable tabular seeds of silver halide are formed, and a second step wherein different batches of seeds obtained in the first step are grown to yield identical or different emulsions. This combination of steps represent a robust process for preparing tabular grain emulsions at different scales.Type: ApplicationFiled: November 9, 2001Publication date: June 6, 2002Applicant: Eastman Kodak CompanyInventors: Pierre-Henri Jezequel, Bruno C. Barillon, Christian S. Schmuckle
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Patent number: 6218098Abstract: A process for the preparation of a high chloride silver halide grain emulsion in which at least 50% of the projected area of the emulsion grains is accounted for by cubic grains, said process comprising: i) precipitating an intermediate emulsion containing high chloride cubic nuclei having an average edge length less than or equal to 0.07 &mgr;m, by adding to an external continuous reactor at least one silver salt aqueous solution, a chloride salt aqueous solution and a hydrophilic colloid aqueous solution, in conditions so that (Qgel*Tgel)/(Qag*CAg) is more than 100, wherein Qgel is the flow rate of the hydrophilic colloid aqueous solution, Tgel is the hydrophilic colloid content of the hydrophilic colloid solution (g/l), QAg is the flow rate of the silver salt aqueous solution, CAg is the silver concentration of the silver salt aqueous solution (mole/l) and is comprised between 0.01 and 5 moles/l, the average pCl in the external reactor being between 1.7 and 3.Type: GrantFiled: September 2, 1999Date of Patent: April 17, 2001Assignee: Eastman Kodak CompanyInventors: Pierre-Henri Jezequel, Christian S. Schmuckle
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Patent number: 6136523Abstract: The present invention allows one to use a phase I reactor to make thinner silver halide grains. This is accomplished by introducing the halide salt solution and the silver salt solution as close as possible to each other above the mixer head. The reactor is essentially divided into a micro reaction zone and a bulk reaction zone, thus, emulating the effect of a phase II or two stage reactor.Type: GrantFiled: May 23, 1995Date of Patent: October 24, 2000Assignee: Eastman Kodak CompanyInventors: Pierre Henri Jezequel, Ramesh Jagannathan
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Patent number: 5879873Abstract: A process of preparing a high bromide {100} tabular grain emulsion is disclosed wherein mean ECD of the tabular grains obtained at the conclusion of ripening is controlled by the use of chloride ion. Specifically, both the concentration of chloride ion introduced before grain nucleation and the proportion of chloride ion and bromide ion present during nucleation are shown to allow control of final mean grain ECD in the fully ripened emulsion.Type: GrantFiled: October 23, 1997Date of Patent: March 9, 1999Assignee: Eastman Kodak CompanyInventors: Luc R. Gourlaouen, Pierre-Henri Jezequel
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Patent number: 5726006Abstract: A photosensitive emulsion is disclosed comprised of a dispersing medium and silver halide grains containing at least 80 mole percent bromide, based on silver, wherein at least 50% of the projected area of said silver halide grains is accounted for by tabular grains free of twin planes having {100} parallel major faces, said emulsion being chemically sensitized and having a reciprocity failure of less than 35 sensitivity units between exposures of respectively 10.sup.-5 seconds and 100 seconds. The emulsion can be employed as a latent image forming emulsion in a photographic element.The emulsion can be prepared by a process preparing a silver bromide photosensitive emulsion, comprising the following essential steps: (a) a nucleation step whereby a fine-grain emulsion with a pAg of between 4 and 6.Type: GrantFiled: July 9, 1996Date of Patent: March 10, 1998Assignee: Eastman Kodak CompanyInventors: Luc Renaud Gourlaouen, Gerard Amede Desire Friour, Pierre-Henri Jezequel, Frederic Xavier Jordi, Jean-Pascal Francis Lebrat
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Patent number: 5723279Abstract: The invention concerns a method and a device for preparing a photographic emulsion.The device according to the invention comprises a plurality of external circulation loops disposed in parallel and in which the content of a vessel containing at least a stirred gelatin solution is circulated, the loops having an identical configuration, means being provided for adding in an identical manner, to each of the loops, reagents required for the formation and/or growth of silver halide grains, the output of the circulation loops being recycled continuously in the vessel.Type: GrantFiled: November 21, 1996Date of Patent: March 3, 1998Assignee: Eastman Kodak CompanyInventor: Pierre Henri Jezequel
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Patent number: 5709990Abstract: The invention relates to a method and a device for preparing a photographic emulsion.In the device of an external loop type of the invention, a solution of a first halide salt X.sub.1.sup.- is introduced at a point in the loop situated outside the reaction zone R within which the silver salt (Ag.sup.+) added to the loop precipitates almost entirely in order to produce silver halide grains or cause them to grow in said solution, the Ag.sup.+ solution being introduced into the reactor in the form of a "centered" jet within said reactor, the Reynolds number Re at the point of introduction of the Ag.sup.+ salt being between approximately 5000 and approximately 50,000.Type: GrantFiled: December 5, 1996Date of Patent: January 20, 1998Assignee: Eastman Kodak CompanyInventors: Pierre Henri Jezequel, Christian Serge Emile Schmuckle
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Patent number: 5413904Abstract: An improved preparation of high chloride {100} tabular grain emulsions that relies on iodide ions to produce tabular grain growth is disclosed. By delaying iodide ion introduction until after the initiation of grain nucleation the proportion of total grain projected area accounted for by high chloride {100} tabular grains is increased. The projected areas of the {100} tabular grains can exceed 95 percent of total grain projected area.Type: GrantFiled: June 3, 1994Date of Patent: May 9, 1995Assignee: Eastman Kodak CompanyInventors: Yun C. Chang, Pierre-Henri Jezequel