Patents by Inventor Pierre Liechti
Pierre Liechti 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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Publication number: 20210040397Abstract: In a method of processing and/or recovering and/or reutilizing residues, especially from refinery processes, containing a base substance, especially comprising hydrocarbon, for example kerosene, and oil, and also metallic residues, the residues are to be introduced into a first reactor (5) in which a portion of the volatile residues evaporates and then is transferred into a second reactor (10) and solidifies therein by cooling, optionally promoted by evaporation of water.Type: ApplicationFiled: October 29, 2020Publication date: February 11, 2021Applicant: List Technology AGInventors: Pierre-Alain Fleury, Pierre Liechti, George Schlager
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Patent number: 10822550Abstract: In a method of processing and/or recovering and/or reutilizing residues, especially from refinery processes, containing a base substance, especially comprising hydrocarbon, for example kerosene, and oil, and also metallic residues, the residues are to be introduced into a first reactor (5) in which a portion of the volatile residues evaporates and then is transferred into a second reactor (10) and solidifies therein by cooling, optionally promoted by evaporation of water.Type: GrantFiled: November 12, 2015Date of Patent: November 3, 2020Assignee: List Technology AGInventors: Pierre-Alain Fleury, Pierre Liechti, George Schlager
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Publication number: 20190093022Abstract: In a method of processing and/or recovering and/or reutilizing residues, especially from refinery processes, containing a base substance, especially comprising hydrocarbon, for example kerosene, and oil, and also metallic residues, the residues are to be introduced into a first reactor (5) in which a portion of the volatile residues evaporates and then is transferred into a second reactor (10) and solidifies therein by cooling, optionally promoted by evaporation of water.Type: ApplicationFiled: November 12, 2015Publication date: March 28, 2019Inventors: Pierre-Alain Fleury, Pierre Liechti, George Schlager
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Patent number: 9394626Abstract: The invention relates to a method for treating a monomer, pre-polymer, polymer or a corresponding mixture, in particular for producing a dope for producing a polymer fiber, in particular a p-aramide fiber, in which the monomer, pre-polymer, polymer, additives or a corresponding mixture is admixed with a solvent, blended, fused, homogenized and/or degassed and then discharged, which takes place at least partially in a reactor (7), is to force-feed the monomer, pre-polymer, polymer or a corresponding mixture into the reactor (7) using a force-feed device (4).Type: GrantFiled: August 6, 2010Date of Patent: July 19, 2016Assignee: List Holding AGInventors: Pierre Liechti, Reinhard Geisler, Manuel Steiner
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Publication number: 20150273731Abstract: A method for implementing mechanical, chemical and/or thermal processes in a product which is located in a housing (1) with mixing and cleaning elements and/or transporting elements (6) on at least one shaft (4, 5), and is transported via the elements (6) from an inlet (2) to an output (10), the intention is for a cross section of the housing (1) to be adjusted in variable fashion at least in the longitudinal direction thereof.Type: ApplicationFiled: September 26, 2013Publication date: October 1, 2015Applicant: LIST HOLDING AGInventors: Pierre-Alain Fleury, Daniel Witte, Roland Kunkel, Alfred Kunz, Pierre Liechti
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Publication number: 20140246386Abstract: In a method for the thermal separation of a volatile substance from a non- or less volatile substrate having a phase boundary towards a gas chamber that receives the volatile substance subsequent to vaporisation and/or sublimation, mechanical energy is supplied to the phase boundary between the substrate and the gas chamber to increase the material exchange of the volatile substance. In the method, the material exchange is increased by the addition of an additive or mechanical energy to the surface of the phase transition in such manner that said supplied mechanical energy destroys bubbles containing the volatile substrate, so that the volatile substrate can escape to the gas chamber.Type: ApplicationFiled: October 5, 2012Publication date: September 4, 2014Applicant: List Holding AGInventors: Daniel WITTE, Andreas DIENER, Pierre LIECHTI
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Patent number: 8376607Abstract: A process for continuously performing polymerization processes, wherein monomer(s), catalysts, and initiators are added continuously to a backmixed mixing kneader (1-1.3) with a length/diameter ratio of 0.5-3.5 and backmixed therein with already reacted product, and the reacted product is simultaneously drawn off continuously from the mixing kneader (1-1.3).Type: GrantFiled: March 30, 2005Date of Patent: February 19, 2013Assignee: List Holding AGInventors: Pierre-Alain Fleury, Thomas Isenschmid, Pierre Liechti
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Publication number: 20120140587Abstract: The invention relates to a method for treating a monomer, pre-polymer, polymer or a corresponding mixture, in particular for producing a dope for producing a polymer fibre, in particular a p-aramide fibre, in which the monomer, pre-polymer, polymer, additives or a corresponding mixture is admixed with a solvent, blended, fused, homogenised and/or degassed and then discharged, which takes place at least partially in a reactor (7), is to force-feed the monomer, pre-polymer, polymer or a corresponding mixture into the reactor (7) using a force-feed device (4).Type: ApplicationFiled: August 6, 2010Publication date: June 7, 2012Applicant: List Holding AGInventors: Pierre Liechti, Reinhard Geisler, Manuel Steiner
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Patent number: 8129460Abstract: A method for producing a spinning solution for producing a polymer fiber, particularly a p-aramid fiber, the polymer being blended with a solvent, mixed, melted, homogenized, and degassed and then discharged, liquid sulfuric acid being used as the solvent and at least the mixing, homogenization, and degassing taking place in a preferably continuously operated single or double cell reactor (1).Type: GrantFiled: May 14, 2008Date of Patent: March 6, 2012Assignee: List Holding AGInventors: Reinhard Geisler, Pierre Liechti, Thomas Isenschmid
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Publication number: 20110269090Abstract: A device for treating a product that can be transported in a housing from an entry point to an exit point, particularly a torr factor for carrying out a roasting process utilizing a hardly flowable product forming nests and having no wall adhesion, wherein chambers are to be formed by disk-shaped elements disposed on a shaft.Type: ApplicationFiled: September 28, 2009Publication date: November 3, 2011Inventors: Alfred Kunz, Pierre Liechti, Walther Schwenk, Bernhard Stuetzle
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Publication number: 20090192631Abstract: A process for continuously performing polymerization processes, wherein monomer(s), catalysts, and initiators are added continuously to a backmixed mixing kneader (1-1.3) with a length/diameter ratio of 0.5-3.5 and backmixed therein with already reacted product, and the reacted product is simultaneously drawn off continuously from the mixing kneader (1-1.3).Type: ApplicationFiled: March 30, 2005Publication date: July 30, 2009Applicant: LIST HOLDING AGInventors: Pierre-Alain Fleury, Thomas Isenschmid, Pierre Liechti
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Publication number: 20080188950Abstract: A prosthetic foot (124) incorporates a foot keel (165) and a calf shank (126) connected to the foot keel to form an ankle joint area of the prosthetic foot. A device (125) connected between the upper end of the calf shank and the lower portion of the prosthesis can be used to assist posterior movement of the upper end of a calf shank and control anterior movement of the upper end of the calf shank during use of the prosthesis. The device (125) has springs which store energy during force loading with anterior motion of the upper end of the calf shank in gait and which, during force unloading, return the stored energy as kinetic power for adding to the propulsive force on the user's body generated by the prosthesis in gait.Type: ApplicationFiled: March 30, 2005Publication date: August 7, 2008Applicant: LIST HOLDING AGInventors: Pierre-Alain Fleury, Thomas Isenschmid, Pierre Liechti
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Patent number: 6162359Abstract: Process for recovering and reusing effluent gas from an ozonization reactor in a plant for treating effluent, especially sewage, which includes a biological reactor, a clarifier and an ozonization reactor. The effluent gas from the ozonization reactor is brought, as a cocurrent, into contact with a stream of water containing compounds that can be oxidized by the ozone, so that the residual ozone is removed and efficiently consumed. The effluent gas thus stripped of the residual ozone is then, optionally, pressurized using a fluid taken from the plant so as to produce a gas/liquid mixture. The gas liquid mixture is converted into an emulsion of fine bubbles, and the emulsion is introduced into the biological reactor, preferably near the bottom of the latter.Type: GrantFiled: July 22, 1999Date of Patent: December 19, 2000Assignees: Degremont, Ozonia InternationalInventors: Marc Andre, Pierre Liechti, Denis Marchand, Eric Thieblin
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Patent number: 5891344Abstract: A flow control apparatus for enriching gas containing oxygen with ozone includes a generator for producing the enriched mixture. A flow meter is connected to the generator outlet to measure the flow of the generated enriched gas. A mass flow control device is connected downstream of the flow meter. A flow control comparator compares a flow value as obtained from the measuring means and a preset constant value. A signal output of the flow control comparator is connected to a signal input of the mass flow control device for varying the mass flow in accordance with the comparison. An outlet of the mass flow control device is connected to an inlet of a compressor for compressing gas, the inlet gas pressure varying to keep compressed gas at a constant pressure. Feedback is provided between an outlet and an inlet of the compressor. A second mass control device is intermediately connected along the feedback connection for adjusting the mass flow of gas passing through the feedback means.Type: GrantFiled: April 12, 1996Date of Patent: April 6, 1999Assignee: Ozonia InternationalInventors: Pierre A. Liechti, Helmut Lang
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Patent number: 5823674Abstract: In a kneader mixer for the thermal or chemical treatment of products in liquid, pasty and/or powdered form within a housing (1), a kneader shaft (20) which is provided with blade elements (25) and rotates around an axis of rotation (A) is arranged. Between the blade elements (25) there are kneading-support elements (27, 43) having in each case a foot (32) fastened on the housing. The blade element(s) (35) is (are) arranged in blade planes (E) perpendicular to the kneader shaft. In this connection, the foot (32) of the kneading-support element (27, 43) also lies in the plane (E) of the blade element(s) (25).Type: GrantFiled: August 28, 1996Date of Patent: October 20, 1998Assignee: List AGInventors: Pierre Liechti, Alfred Kunz, Jorg List, Daniel Arnaud
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Patent number: 5366703Abstract: A method for the generation of a supply of ozone containing process gas exhibiting high effective ozone content basically involves the steps of (a) providing a stream of an oxygen containing feed gas having a temperature not greater than about 50.degree. C. and an absolute pressure between about 1 and 3 bar, (b) subjecting the stream of feed gas to an electric discharge that transforms some of its oxygen content into ozone to produce a stream of ozone containing gas, and (c) compressing the ozone containing gas with simultaneous cooling thereof to produce a stream of ozone containing process gas having a temperature not greater than about the temperature of the feed gas, an absolute pressure greater than 3 bar and an absolute ozone partial pressure of at least 0.2 bar. Various systems for carrying out such methods are disclosed.Type: GrantFiled: February 10, 1992Date of Patent: November 22, 1994Assignee: Ozonia International S.A.Inventors: Pierre A. Liechti, Franco Gaia, Marc Andre
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Patent number: 5147135Abstract: In the case of a continuously operating mixing kneader for the thermal or chemical treatment of products in liquid, pasty and/or pulverulent state in a housing, there is arranged in this housing, running axially, a kneader shaft (20), which is equipped with disk elements (25) and kneading bars (40) and rotates about an axis of rotation (z). Said kneader shaft effects the transporting of the product in the direction of transport (x). Between the disk elements (25) there are provided kneading counter-elements (33), fixed to the housing (1), the disk elements (25) being arranged furthermore in disk planes (42) perpendicularly to the kneader shaft and forming between them free sectors, which create kneading chambers with the disk plane (42) of adjacent disk elements (25). In this arrangement, the kneading bars (40) are intended to be arranged on a positive or negative offset line (43 or 44) in the kneading chambers between two disk planes (42).Type: GrantFiled: April 10, 1991Date of Patent: September 15, 1992Assignee: List AGInventors: Jorg List, Walther Schwenk, Winfried Dotsch, Pierre Liechti
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Patent number: 4889431Abstract: Heatable or coolable mixing kneader for batchwise or continuous operation for mixing/kneading processes with liquid, pasty and free-flowing products, with a kneading shaft (16) coaxially rotating in a cylindrical housing (1), with disk elements (17) mounted at right angles thereupon, with kneading bars (18), which interest with kneading counterelements (19/20/21) fixed in the housing, characterized in that these kneading tools are designed as interengaging forks with kneading gaps of large specific length.Type: GrantFiled: August 22, 1988Date of Patent: December 26, 1989Assignee: List AGInventor: Pierre Liechti