Patents by Inventor Karl Kempter
Karl Kempter 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: 6764771Abstract: The invention relates to a product (1), particularly a gas turbine blade that can be exposed to a hot aggressive gas (7). The product (1) has a metallic basic body (2), which is provided with a thermal barrier coating (4) having a spinel of the composition AB2O4.Type: GrantFiled: December 22, 2000Date of Patent: July 20, 2004Assignee: Siemens AktiengesellschaftInventors: Beate Heimberg, Wolfram Beele, Karl Kempter, Ulrich Bast, Thomas Haubold, Michael Hoffmann, Axel Endriss, Peter Greil, Chu-Wan Hong, Fritz Aldinger, Hans J. Seifert
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Patent number: 6602553Abstract: An article that is particularly well suited for use as a gas turbine engine component has a metallic substrate and a ceramic thermal barrier layer including a mixed metal oxide system comprising a compound selected from the group consisting of (i) a lanthanum aluminate and (ii) a calcium zirconate, the calcium in which is partially replaced by at least one calcium-substitute element, such as strontium (Sr) or barium (Ba). In addition, the lanthanum in the lanthanum aluminate can be partially replaced by a lanthanum-substitute element from the lanthanide group, particularly gadolinium (Gd). A process for producing such an article comprises providing a pre-reacted mixed metal oxide system as described above and applying it to the substrate by plasma spraying or an evaporation coating process.Type: GrantFiled: July 1, 2002Date of Patent: August 5, 2003Assignees: Siemens Aktiengesellshaft, Rolls-Royce Deutschland GmbHInventors: Beate Heimberg, Wolfram Beele, Karl Kempter, Ulrich Bast, Thomas Haubold, Michael Hoffmann, Axel Endriss, Peter Greil, Chu-Wan Hong, Fritz Aldinger, Hans J. Seifert
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Publication number: 20020164430Abstract: An article that is particularly well suited for use as a gas turbine engine component has a metallic substrate and a ceramic thermal barrier layer including a mixed metal oxide system comprising a compound selected from the group consisting of (i) a lanthanum aluminate and (ii) a calcium zirconate, the calcium in which is partially replaced by at least one calcium-substitute element, such as strontium (Sr) or barium (Ba). In addition, the lanthanum in the lanthanum aluminate can be partially replaced by a lanthanum-substitute element from the lanthanide group, particularly gadolinium (Gd). A process for producing such an article comprises providing a pre-reacted mixed metal oxide system as described above and applying it to the substrate by plasma spraying or an evaporation coating process.Type: ApplicationFiled: July 1, 2002Publication date: November 7, 2002Inventors: Beate Heimberg, Wolfram Beele, Karl Kempter, Ulrich Bast, Thomas Haubold, Michael Hoffmann, Axel Endriss, Peter Greil, Chu-Wan Hong, Fritz Aldinger, Hans J. Seifert
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Patent number: 6440575Abstract: An article that is particularly well suited for use as a gas turbine engine component has a metallic substrate and a ceramic thermal barrier layer including a mixed metal oxide system comprising a compound selected from the group consisting of (i) a lanthanum aluminate and (ii) a calcium zirconate, the calcium in which is partially replaced by at least one calcium-substitute element, such as strontium (Sr) or barium (Ba). In addition, the lanthanum in the lanthanum aluminate can be partially replaced by a lanthanum-substitute element from the lanthanide group, particularly gadolinium (Gd). A process for producing such an article comprises providing a pre-reacted mixed metal oxide system as described above and applying it to the substrate by plasma spraying or an evaporation coating process.Type: GrantFiled: May 1, 2000Date of Patent: August 27, 2002Assignees: Siemens Aktiengesellschaft, Rolls-Royce Deutschland GmbHInventors: Beate Heimberg, Wolfram Beele, Karl Kempter, Ulrich Bast, Thomas Haubold, Michael Hoffmann, Axel Endriss, Peter Greil, Chu-Wan Hong, Fritz Aldinger, Hans J. Seifert
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Patent number: 6218037Abstract: A process for the production of an insulating component from a ceramic material for a high temperature fuel cell includes the following steps: In a first step, a ceramic material is converted into a dispersion by wet preparation with a water-soluble binder. In a second step, the dispersion is poured to form a water-containing layer. In a third step, the water-containing layer is converted at elevated temperature to form a rubbery layer. In a fourth step, the binder is burnt off from the rubbery layer at elevated temperature. In a fifth step, the layer from which the binder has been burnt off is set at elevated temperature. In a sixth and a seventh step, the layer which has been set is processed in accordance with the dimensions of the insulating component and consolidated by sintering.Type: GrantFiled: August 13, 1998Date of Patent: April 17, 2001Assignee: Siemens AktiengesellschaftInventors: Horst Greiner, Karl Kempter
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Patent number: 5647667Abstract: For testing structural ceramic parts under overload conditions, a previously calculated temperature distribution is generated on the part by thermal radiation, this temperature distribution inducing the desired test stress or overload. The temperature distribution is measured with topically and temporally resolving temperature sensors, is compared to a desired or calculated temperature distribution, and is regulated by varying the duration and/or location of the radiation influence until the desired temperature distribution has been produced.Type: GrantFiled: June 6, 1995Date of Patent: July 15, 1997Assignee: Siemsns AktiengesellschaftInventors: Ulrich Bast, Karl Kempter, Thomas Schulenberg
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Patent number: 4554453Abstract: The invention relates to an apparatus for the taking of X-ray pictures, where there are between two radiation-transmitting electrodes two solid substance layers whose free sides lie in a charge storage layer. The first electrode is a photo-conducting layer which is impinged upon by image rays, while the second electrode is a photo-conducting layer which is impinged upon by an optical ray moved in a scanning raster, so that a reproducible signal is obtained. According to the invention, the time required per image is reduced and increased quantum yield is achieved at increased signal-to-noise ratio and greater dynamic range. There is correlated to the first photo-conducting layer a luminophor which transforms the image rays into light which is preferentially absorbed in this layer. An apparatus according to the invention is usable in particular in medical radio-diagnostics.Type: GrantFiled: March 28, 1984Date of Patent: November 19, 1985Assignee: Siemens AktiengesellschaftInventors: Ingmar Feigt, Hans Heinrich, Karl Kempter
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Patent number: 4535468Abstract: The invention relates to a photographic apparatus useable, for example, in medical radiodiagnostics, with a three-layer system lying between two electrodes, to which a d-c voltage is applied. The two outer layers are photoconductors and the middle layer consists of a material in which charge carriers can be stored. An image radiated from one side can be read out from the other side in the form of an electric pulse sequence by scanning by means of a light beam and can be reproduced on a television screen. The invention provides a storage layer which has areas in which charge carriers adhere and that on the side of the system on which the image is radiated in the electrode has the same polarity as the charge carriers for which the storage layer has traps.Type: GrantFiled: September 23, 1983Date of Patent: August 13, 1985Assignee: Siemens AktiengesellschaftInventor: Karl Kempter
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Patent number: 4362766Abstract: In the present invention a process is provided for depositing a protective passivating film of doped or undoped amorphous silicon on a body of semiconductor material. In the process a body of semiconductor material is disposed within a reaction vessel, a silicon-hydrogen gaseous compound is fed into the reaction vessel and decomposed by means of a glow discharge. The decomposition of the silicon-hydrogen gas mixture results in the deposition of amorphous silicon on the semiconductor body.Type: GrantFiled: July 1, 1981Date of Patent: December 7, 1982Assignee: Siemens AktiengesellschaftInventors: Friedrich Dannhauser, Karl Kempter, Jurgen Krausse, Manfred Schnoller
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Patent number: 4244646Abstract: A device for electrophotographically copying wherein for writing a charge pattern into a suitable photo-conductive layer with differing electron mobility and hole mobility a relatively long wave length of light is used which has a penetration depth comparable with the thickness of the layer and which has a quantum energy which corresponds to the energy of deep traps for the less mobile kind of charge carriers. Due to the long life of the charge carriers in the deep traps, the newly applied charges of opposite polarity remain on the exposed locations for a relatively long time since the charge has been caught in the traps whereas the unexposed locations are repeatedly charged again to maintain an undisturbed potential such that the charge pattern is retained for a longer time even with continued exterior charging.Type: GrantFiled: February 14, 1979Date of Patent: January 13, 1981Assignee: Siemens AktiengesellschaftInventors: Eberhard Bayer, Karl Kempter
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Patent number: 4225222Abstract: A printing drum is disclosed for electrostatic copying. The drum has a photo-electric-sensitive layer consisting of amorphous silicon advantageously containing hydrogen. The layer is designed to have a PN transition. A method is also disclosed for producing the layer by means of decomposition of a conveyed silicon-containing gas to which, if necessary, a gaseous doping material is added during a glow discharge in a heated printing drum.Type: GrantFiled: October 17, 1978Date of Patent: September 30, 1980Assignee: Siemens AktiengesellschaftInventor: Karl Kempter