Lehn
Heinz Lehn, Frankfurt A. M. DE
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20150328618 | REACTOR FOR PRODUCING OR TREATING A POLYMER MELT - A reactor for producing or treating a polymer melt, comprising a bottom valve via which the polymer melt can be discharged from the reactor, wherein the bottom valve comprises a valve seat and a closing body which can form a common sealing surface. | 11-19-2015 |
Jean-Marie Lehn, Starsbourg FR
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20120010174 | CALCIUM/SODIUM SALT OF INOSITOL TRIPYROPHOSPHATE AS AN ALLOSTERIC EFFECTOR OF HEMOGLOBIN - The present invention relates to mixed calcium/sodium salt of inositol tripyrophosphate, methods of preparing and methods of use. The mixed calcium/sodium salt may be a monocalcium tetrasodium salt of inositol tripyrophosphate. Methods of use include administering the above salts in an effective amount to treat diseases caused by hypoxia or other conditions associated with inadequate function of the lungs or circulatory system, such as various types of cancer and Alzheimer's disease. | 01-12-2012 |
Karsten Lehn, Kamen DE
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20120270659 | METHOD AND DEVICE FOR GENERATING A GAME DIRECTORY ON AN ELECTRONIC GAMING DEVICE - A method and a device for simplifying the forming of game parties in wireless communication networks is provided. A game directory is generated comprising all available (multi-player) games on a mobile device and exchanging said information between different gaming devices. Said game directory is generated by querying a memory accessible by said electronic gaming device for electronic games available for execution on, and generating a game directory having entries for each electronic game which is determined. Said game directory is then exchanged to visualize all available games to all potential game partners. | 10-25-2012 |
Michael Lehn, Celle DE
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20140116588 | TREAD PROFILE OF A PNEUMATIC VEHICLE TIRE FOR UTILITY VEHICLES - A tread profile has a tread profile section which is in the center of the tire in the axial direction, and in each case one shoulder profile section. The central tread profile section is composed of profile belts, and the shoulder profile sections each have a second profile belt. A circumferential groove is arranged in each case between a first profile belt of the central section and the profile belt of the shoulder section. The groove is formed with a web which is radially raised from the groove base and which divides the groove into a narrow first and a wider second section which has, at the groove base, a linear section of extent which merges, with a curvature radius R | 05-01-2014 |
Peter Lehn, Toronto CA
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20130090712 | FUNCTIONAL ELECTRICAL STIMULATION DEVICE AND SYSTEM, AND USE THEREOF - Disclosed herein is a functional electrical stimulation (FES) device and system. In one embodiment, sequential bipolar pulse stimulation may be provided to an area of a living body via one or more electrode leads applied to the area via a FES device comprising a current pulse generating circuit comprising output nodes for operative coupling to the one or more electrode leads, and configured for operative coupling to a voltage supply. The current pulse generating circuit generally comprises positive and negative stimulation paths drawing from the voltage supply to respectively apply positive and negative currents through the area via the one or more electrode leads. In one example, the stimulation paths comprise respective capacitive elements, a capacitance ratio of which dictating, at least in part, an amplitude ratio of the positive and negative currents, wherein periodic alternative activation of the stimulation paths provides the sequential bipolar pulse stimulation. In another example, each path comprises a respective charging element and a respective activation switch, wherein each respective charging element is charged by the voltage supply and discharged upon activation of the respective activation switch to generate positive and negative current pulses respectively, such that a pulse rise time of the positive and negative current pulses is predominantly dictated by a switching speed of each respective switch. Systems and uses for these devices, and FES in general, are also described. | 04-11-2013 |
20150039051 | Functional Electrical Stimulation Device and System, and Use Thereof - A functional electrical stimulation (FES) device and system. In one embodiment, sequential bipolar pulse stimulation may be provided to an area of a living body via one or more electrode leads applied to the area via a FES device comprising a current pulse generating circuit comprising output nodes for operative coupling to the one or more electrode leads, and configured for operative coupling to a voltage supply. The current pulse generating circuit generally comprises positive and negative stimulation paths drawing from the voltage supply to respectively apply positive and negative currents through the area via the one or more electrode leads. In one example, the stimulation paths comprise respective capacitive elements, a capacitance ratio of which dictating, at least in part, an amplitude ratio of the positive and negative currents, wherein periodic alternative activation of the stimulation paths provides the sequential bipolar pulse stimulation. | 02-05-2015 |
20150138848 | SYSTEM AND METHOD TO REDUCE THE ENERGY STORAGE REQUIREMENTS OF A CASCADED CONVERTER SYSTEM - A method and system for controlling a cascaded converter has an upstream converter and a downstream converter coupled in series. An energy storage element is provided between the two converters for providing constant energy and to respond to a load step in the load of the system. An upstream controller is connected to the output of the downstream controller to control the duty cycle of the upstream converter as a function of the duty cycle of the downstream controller. The upstream converter controls the duty cycle of the upstream converter in order to maintain the duty cycle of the second converter at a substantially constant reference value. This control of the converters allows for reduction of the energy storage requirements of the cascaded system. | 05-21-2015 |
Peter Waldemar Lehn, Toronto CA
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20120195074 | DC-DC Converter Circuit For High Input-To-Output Voltage Conversion - The present invention provides a series of DC-DC converter circuit designs, and DC-DC converters based on such circuit design, that provide high input-to-output voltage conversion. The converters include a resonant tank and a means for interrupting the tank current to produce a near zero-loss “hold” state wherein zero current and/or zero voltage switching is provided, while providing control over the amount of power transfer. A resonant DC-DC converter for high voltage step-up ratio in accordance with the circuit design includes: (a) a low voltage DC-AC converter, (b) a resonant tank, (c) a high voltage AC-DC converter, (d) a (i) common ground on an input and an output without use of a transformer and/or (ii) a single high voltage controllable switch within the resonant tank. | 08-02-2012 |
20130121033 | DC-DC CONVERTER CIRCUIT USING LLC CIRCUIT IN THE REGION OF VOLTAGE GAIN ABOVE UNITY - The present invention provides a series of DC-DC converter circuit designs, and DC-DC converters based on such circuit design, that provide high input-to-output voltage conversion. The converters include a resonant tank and a means for interrupting the tank current to produce a near zero-loss “hold” state wherein zero current and/or zero voltage switching is provided, while providing control over the amount of power transfer. A resonant DC-DC converter for high voltage step-up ratio in accordance with the circuit design includes: (a) a low voltage DC-AC converter, (b) a resonant tank, (c) a high voltage AC-DC converter, (d) a (i) common ground on an input and an output without use of a transformer and/or (ii) a single high voltage controllable switch within the resonant tank. | 05-16-2013 |
20150162840 | DC-DC CONVERTER CIRCUIT USING AN LLC CIRCUIT IN THE REGION OF VOLTAGE GAIN ABOVE UNITY - A method of operating a resonant DC-DC converter is provided where the resonant DC-DC converter includes a high voltage boost LLC circuit. The method includes providing variable power flow control to the LLC circuit with externally determined input and output voltages using frequency control. Frequency control is applied such that it emulates different loading conditions. For fixed input and output voltages this corresponds to operating along horizontal curves on the voltage gain compared to the switching frequency operating plane. A DC-DC converter is also provided including (A) a low voltage full-bridge or half-bridge DC-AC converter; (B) an LLC resonant tank; (C) a high voltage AC-DC converter or rectifier; and (D) a high voltage controllable switch; wherein the high voltage controllable switch is controllable to regulate power flow from an input to an output of the DC-DC converter based on an externally determined voltage gain ratio, wherein the LLC resonant lank operates with a minimum boosting having an effective value above unity over the entire operating range. A method of designing a resonant DC-DC converter for high voltage boost ratio is also provided. | 06-11-2015 |
Pierre Lehn, Brest FR
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20090232880 | Analogue Compounds Of Archaebacterial Membrane Lipids And Liposomal Compounds Integrating Such Compounds - The invention relates to a compound of general formula (I): where =0 or 1, Z=O, S or CH | 09-17-2009 |
20100035974 | COMPOSITIONS COMPRISING A SIRNA AND LIPIDIC 4,5-DISUBSTITUTED 2-DEOXYSTREPTAMINE RING AMINOGLYCOSIDE DERIVATIVES AND USES THEREOF - The present invention relates to a composition comprising a siRNA and a transfecting compound consisting of an aminoglycoside of the class of 4,5-disubstituted 2-deoxystreptamine ring linked via a spacer molecule to a lipid moiety of formula —(R1)R2 wherein R1 and R2 represent, independently of one another, a hydrogen atom or a fatty aliphatic chain or R1 or R2 is absent, with the proviso that at least one of R1 and R2 represents a fatty aliphatic chain; or —OR3 or —NR3 wherein R3 represents a steroidal derivative. The invention also concerns in vitro and in vivo applications of these compositions. | 02-11-2010 |