Patents Assigned to Ecole Polytechnique
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Publication number: 20110236432Abstract: Coating for a medical device comprising cell-adhesive proteins having the ability to reduce fibrous reaction, said coating being in the form of separate islets having an individual area which is less than 12 ?m2 and wherein the distance between the islets is less than 50 ?m.Type: ApplicationFiled: September 7, 2009Publication date: September 29, 2011Applicant: Ecole Polytechnique Federale de LausanneInventors: Hicham Majd, Giorgio Pietramaggiori, Boris Hinz
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Patent number: 8021689Abstract: Nanoparticles that activate complement in the absence of biological molecules are described. The nanoparticles are shown to specifically target antigen presenting cells in specifically in lymph nodes, without the use of a biological molecule for targeting. These particles are useful vehicles for delivering immunotherapeutics.Type: GrantFiled: February 19, 2007Date of Patent: September 20, 2011Assignee: Ecole Polytechnique Federale de Lausanne (“EPFL”)Inventors: Sai T. Reddy, Jeffrey A. Hubbell, Melody A. Swartz, André van der Vlies
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Publication number: 20110223217Abstract: An encoding/decoding apparatus and method using a low-density parity-check code (LDPC code) is disclosed. Basic column group information, serving as a set of information regarding positions of rows with weight 1, is extracted from a reference column in each column group of a predetermined parity-check matrix. Column group information transforms the positions of rows with weight 1 into positions whose lengths are within a required parity length. A parity-check matrix is generated according to the generated column group information. Data is encoded or decoded based on the generated parity-check matrix.Type: ApplicationFiled: November 24, 2009Publication date: September 15, 2011Applicant: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: James Brandon Dixon, Jeffrey A. Hubbell, Conlin P. O'Neil, Melody Swartz, Diana Velluto
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Publication number: 20110217804Abstract: A method for fabricating a micromirror in a wafer, including the steps of: depositing and etching layers forming two arms; etching the wafer such that in the back face only a thin portion of the wafer remains in the region of formation of the micromirror and the arms; performing an anisotropic etch, such that the thin portion remains only in the areas of the micromirror and the arms; and performing an isotropic etch to remove the thin portions under the arms, the etching step for forming the arms being performed following their shape and so as to form holes traversing the arms, the holes being positioned at edges of the region separating the micromirror and the wafer on both the side of the micromirror and the side of the portions of the wafer remaining after the anisotropic etching step. The invention also concerns the micromirror.Type: ApplicationFiled: June 24, 2008Publication date: September 8, 2011Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Nicolas Abele, Faouzi Khechana, Philippe Renaud
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Patent number: 8007823Abstract: The present invention relates to a highly controlled method of preparation of a microporous biodegradable polymeric article. Firstly, at least one biodegradable polymer A, one polymer B, biodegradable or not, partially or totally immiscible with A, and a compatibilizer C for A and B are selected. Secondly, the selected polymers are melt-blended, thereby preparing a polymer blend, wherein said polymers A and B have an essentially continuous morphology. Thirdly, after cooling, polymer B and compatibilizer C are selectively extracted from the polymer blend by dissolution in a solvent that is a non-solvent of polymer A. The resulting polymeric article has an essentially continuous porosity with a void volume between 10 and 90% and a unimodal diameter distribution set to a predefined unimodal peak location. It can be used in tissue engineering, for controlled release applications or as an implantable medical device.Type: GrantFiled: April 2, 2004Date of Patent: August 30, 2011Assignee: Corporation de l'Ecole Polytechnique de MontrealInventors: Basil D. Favis, Pierre Sarazin, Jianming Li, Zhenhua Yuan
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Patent number: 8008109Abstract: A method for manufacturing the active plate of a flat matrix display screen, in which each cell comprises an electrode plate connected by a transistor to a first conductive line, comprising the steps of providing an outgrowth coated with an insulator of each first conductive line at the level of each cell; etching or making porous an end portion of each outgrowth; laterally growing, for example, by a VLS method, a PIP or NIN semiconductor structure in each end portion which has been etched or made porous; and establishing a contact at the free end of the semiconductor structure and forming a gate at the level of the median portion of the semiconductor structure.Type: GrantFiled: June 29, 2006Date of Patent: August 30, 2011Assignees: Centre National de la Recherche Scientifique, Ecole PolytechniqueInventors: Didier Pribat, Costel Sorin Cojocaru
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Publication number: 20110205539Abstract: A spectroscopic polarimetric system of broad spectral range, includes a light source suitable for emitting an incident light beam over a wavelength range, a polarization state generator (PSG), a polarization state analyzer (PSA), and a detector. The PSG and the PSA have respective elements for modulating the polarization of the light beam. The elements of the PSG for modulating polarization are suitable for generating a sequence of m polarization states with m>4 at each measurement wavelength, the elements of the PSA for modulating polarization are suitable for determining a sequence of n polarization states with n>4 for each measurement wavelength, and the detector elements are suitable for acquiring a sequence of N measurements with 16<N?n×m at each wavelength to extract therefrom a polarimetric spectroscopic measurement of the Mueller matrix of the sample. An extended spectroscopic polarimetric measurement method is also described.Type: ApplicationFiled: October 28, 2009Publication date: August 25, 2011Applicants: HORIBA JOBIN YVON SAS, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, ECOLE POLYTECHNIQUEInventors: Denis Cattelan, Enric Garcia-Cautel, Antonello De Martino, Bernard Drevillon
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Publication number: 20110207157Abstract: The invention relates to new proteins called alkylcytosine transferases (ACTs) derived from O6-alkylguanine-DNA alkyltransferase, and to substrates for ACTs specifically transferring a label to these ACTs and to fusion proteins comprising these. The substrates according of the invention are substituted cytosines of formula (I) wherein R1 is an aromatic or a heteroaromatic group, or an optionally substituted unsaturated alkyl, cycloalkyl or heterocyclyl group with the double bond connected to OCH2—; R2 is a linker; and L is a label or a plurality of same or different labels. The invention further relates to methods of transferring label L from these substrates of formula (I) to ACTs and ACT fusion proteins. The system of ACT-compound of formula (I) is particularly suitable for double labelling studies together with the known system O6-alkylguanine-DNA alkyltransferase (AGT)-benzylguanines.Type: ApplicationFiled: July 24, 2007Publication date: August 25, 2011Applicant: Ecole Polytechnique Federale de LausanneInventors: Arnaud Gautier, Kai Johnsson, Maik Kindermann, Alexandrc Juillerat, Florent Beaufils
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Publication number: 20110198313Abstract: The invention relates to a controlled graphene film growth process characterized in that it comprises the following steps: the production on the surface of a substrate (S1) of a layer of a metal having with carbon a phase diagram such that above a molar concentration threshold ratio CM/CM+CC, where CM is the molar metal concentration in a metal/carbon mixture and CC is the molar carbon concentration in said mixture, a homogeneous solid solution is obtained; the exposure of the metal layer to a controlled flux of carbon atoms or carbon-containing radicals or carbon-containing ions at a temperature such that the molar concentration ratio obtained is greater than the threshold ratio so as to obtain a solid solution of carbon in the metal; and an operation for modifying the phase of the mixture into two phases, a metal phase and a graphite phase respectively, leading to the formation of at least a lower graphene film (31) located at the (metal layer incorporating carbon atoms)/substrate interface and an upperType: ApplicationFiled: October 16, 2009Publication date: August 18, 2011Applicants: ECOLE POLYTECHNIQUE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Laurent Baraton, Costel-Sorin Cojocaru, Didier Pribat
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Publication number: 20110201514Abstract: A method of using O6-alkylguanine-DNA alkyltransferase (AGT) is disclosed for transferring a label from a substrate to a fusion protein comprising the AGT. This allows the detection and/or manipulating of the fusion protein, both in vitro and in vivo, by attaching molecules to the fusion proteins that introduce a new physical or chemical property to the fusion protein. Examples of such molecules are, among others, spectroscopic probes or reporter molecules, affinity tags, molecules generating reactive radicals, cross-linkers, ligands mediating protein-protein interactions or molecules suitable for the immobilisation of the fusion protein.Type: ApplicationFiled: January 24, 2011Publication date: August 18, 2011Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNEInventors: Kai Johnsson, Susanne Kindermann (née Gendreizig), Antje Keppler
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Patent number: 7998785Abstract: A method is described of forming a film of an amorphous material on a substrate (14) by deposition from a plasma. The substrate (14) is placed in an enclosure, a film precursor gas is introduced into the enclosure through pipes (20), and unreacted and dissociated gas is extracted from the enclosure through pipes (22) so as to provide a low pressure therein. Microwave energy—is introduced into the gas within the enclosure as a sequence of pulses at a given frequency and power level to produce a plasma therein by distributed electron cyclotron resonance (DECR) and cause material to be deposited from the plasma on the substrate. The frequency and/or power level of the pulses is altered during the course of deposition of material, so as to cause the bandgap to vary over the thickness of the deposited material.Type: GrantFiled: October 26, 2007Date of Patent: August 16, 2011Assignees: Dow Corning Corporation, Ecole PolytechniqueInventors: Pere Roca I Cabarrocas, Pavel Bulkin, Dmitri Daineka, Patrick Leempoel, Pierre Descamps, Thibault Kervyn De Meerendre
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Publication number: 20110193053Abstract: A method of fabricating semiconductor nanowires (5) on a substrate (1) having a metallic oxide layer (2), includes: a) exposing the metallic oxide layer to a hydrogen plasma (11) of power P for a duration t suitable for reducing the layer and for forming metallic nanodrops (3) of radius (Rm) on the surface of the metallic oxide layer; b) low temperature plasma-assisted deposition of a thin layer (4) of a semiconductor material on the metallic oxide layer including the metallic nanodrops, the thin layer having a thickness (Ha) suitable for covering the metallic nanodrops; and c) thermal annealing at a temperature T sufficient to activate lateral growth of nanowires by catalysis of the material deposited as a thin layer from the metallic nanodrops. Also described are nanowires obtained by this method and nanometric transistors including a semiconductor nanowire, for forming a semiconductive connection between a source (16), a drain (17), and a gate (18).Type: ApplicationFiled: October 9, 2009Publication date: August 11, 2011Applicants: ECOLE POLYTECHNIQUE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Pere Roca I Cabarrocas, Linwei Yu
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Patent number: 7995599Abstract: A method to provide reliability, power management and load balancing support for multicore systems based on Networks-on-Chip (NoCs) and to efficiently implement architectural support for this method by introducing complex packet handling mechanisms is achieved by modifying the basic network interfaces attached to the cores of multicore computation systems. It also proposes policies to leverage the proposed hardware extensions. This aim is achieved with a method to manage the load of peripheral elements within a multicore system comprising several processing units accessing peripheral elements through a NoC, each processing unit and peripheral element attached to a Network Interface in charge of formatting and driving the packets sent to or received from the NoC, wherein, while considering at least two peripheral elements having a similar function, the Network Interface dedicated to a first peripheral element reroutes the incoming packets to a second Network Interface dedicated to a second peripheral element.Type: GrantFiled: March 27, 2009Date of Patent: August 9, 2011Assignee: Ecole Polytechnique Federale De Lausanne (EPFL)Inventors: Federico Angiolini, David Atienza Alonso, Giovanni De Micheli
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Patent number: 7994724Abstract: An inductive plasma applicator comprises a ferromagnetic inductively coupled source and an electrode with a hole pattern centered with respect to the plasma source. Such plasma applicator provides an efficient energy transfer to the plasma. The plasma applicator is preferably manufactured using a technology for producing electrical circuits. The electrode and a coil of the ferromagnetic inductively coupled plasma source are metal track portions formed on an insulating substrate. For example, the plasma applicator is manufactured using printed circuit board technology.Type: GrantFiled: March 27, 2009Date of Patent: August 9, 2011Assignees: Ecole Polytechnique, Centre National de la Recherche Scientifique-CNRSInventor: Sébastien Dine
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Publication number: 20110186449Abstract: Method and a device for capturing heavy metal ions included in sewage sludge. The method includes steps of: a) placing in the fluid a functionalized radiografted track-etched membrane FRTEM which contains polymer nanopores; this membrane including a first electrode on one side of the membrane, b) selectively capturing heavy metal ions inside the polymer nanopores, c) applying an anodic stripping voltammetric ASV analysis on the membrane in order to differentiate and quantify captured metal ions, the first electrode being used as an ASV detection electrode.Type: ApplicationFiled: June 5, 2009Publication date: August 4, 2011Applicants: ECOLE POLYTECHNIQUE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Marie-Claude Laurence Clochard, Travis Lee Wade
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Publication number: 20110190789Abstract: The system comprises at least three anchors (2,2?,2?) intended to be attached to the patient and equipped with markers (5,5?,5?), an insertion guide device (6) with an insertion guide (7) intended to be attached to said anchors (2,2?,2?), an external calibration device (8) with at least three calibration markers (10,10?,10?) corresponding to said markers (5,5?,5?) and a planning and imaging software. The planning and imaging software is used to determine the position of a target point in the patient with respect to the markers (5,5?,5?), the calibration device is used to calibrate and orient the insertion guide (7) of the insertion guide device (6) mounted on said calibration markers (10,10?,10?) using the determination of the software before the insertion guide device is mounted on said markers (5,5?,5?) attached to the patient.Type: ApplicationFiled: November 5, 2008Publication date: August 4, 2011Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Jean-Philippe Thiran, Claudio Pollo
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Publication number: 20110175611Abstract: A method for sample preparation for magnetic resonance measurements using Hyperpolarization by Dissolution Dynamic Nuclear Polarization, involves preparation of frozen beads of a first kind containing paramagnetic substances in addition to the solute under investigation; insertion of the frozen beads into a polarizing magnet; creation of enhanced polarization of nuclei in a magnetic field; heating of the sample to room temperature; transfer of the sample to an MR magnet; and carrying out an MR measurement. In addition, frozen beads of a second kind containing a reducing agent are prepared and inserted into the polarization magnet together with the frozen beads of the first kind. By this method, longitudinal and transverse relaxation times in NMR are extended and free radicals in hyperpolarized solutions are eliminated.Type: ApplicationFiled: January 12, 2011Publication date: July 21, 2011Applicants: Bruker BioSpin AG, Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Sami Jannin, Pascal Mieville, Geoffrey Bodenhausen
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Publication number: 20110169978Abstract: The present invention relates to a functional optical coherent imaging (fOCI) platform comprising at least one active camera unit (ACU) comprising a coherent and/or a partially coherent light source, and means for spectral filtering and imaging a selected body area of interest; an image processing unit (IPU) for pre-processing data received from an ACU; at least one stimulation unit (STU) transmitting a stimulation to a subject; at least one body function reference measurement unit (BFMU); a central clock and processing unit (CCU), with interconnections to the ACU, the IPU, the STU, for collecting pre-processed data from the IPU, stimuli from the STU body function reference data from the BFMU in a synchronized manner; a post-processing unit (statistical analysis unit, SAU); and an operator interface (HOD.Type: ApplicationFiled: July 10, 2008Publication date: July 14, 2011Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Theo Lasser, Dimitri Van De Ville, Erica Martin-Williams, Marcel Leutenegger, Iwan Maerki, Michael Friedrich, Martin Villiger
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Publication number: 20110165593Abstract: The invention relates to AGT mutants showing, when compared to the wild type human AGT, two or more advantageous properties selected from (a) reduced DNA interaction; (b) localisation of the expressed protein in eukaryotic cells that is no longer restricted to the nucleus; (c) improved expression yield as soluble protein and improved stability in various hosts; (d) improved stability under oxidising conditions; (e) improved stability within cells after reaction with a substrate; (f) improved stability outside cells before and after reaction with a substrate; (g) improved in vitro solubility; (h) improved reactivity against O6-alkylguanine substrates; (i) reduced reactivity against DNA-based substrates; and (j) reduced reactivity against N9-substituted O6-alkylguanine substrates.Type: ApplicationFiled: January 13, 2011Publication date: July 7, 2011Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNEInventors: Jan Barnikow, Christopher Chidley, Thomas Gronemeyer, Christian Heinis, Hughes Jaccard, Kai Johnsson, Alexandre Juillerat, Antje Keppler
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Publication number: 20110157551Abstract: An optical device for measuring the transmission and diffusion of a tissue of the front segment of an eye, includes: a light source; an optical collimation system for directing the collimated light beam towards a tissue of the front segment of an eye to be characterized; an optical mire placed on the optical path between the optical collimation system and the tissue; an optical imaging system capable of receiving a light beam transmitted by the mire and the tissue and capable of forming an image of the mire on an image detector; and an image processing system capable of calculating a modulation transfer function for the tissue from an image of the mire through the ocular medium. The optical mire includes a set of alternately light and dark angular sectors radially distributed from a central point. Different image processing methods for extracting a function representing the transmission and diffusion characteristics of the tissue are described.Type: ApplicationFiled: September 8, 2009Publication date: June 30, 2011Applicants: ECOLE POLYTECHNIQUE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, ECOLE NATIONALE SUPERIEURE DE TECHNIQUES AVANCEESInventors: Kartsen Plamann, Florent Aptel, Caroline Crotti, Florent Deloison, Donald Peyrot