Patents by Inventor Thomas Fetzer

Thomas Fetzer 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).

  • Publication number: 20200086451
    Abstract: A method includes providing a metal ring and pastelessly slide-grinding at least one surface of the metal ring with grinding bodies, preferably until a predefined surface topography of the metal ring is achieved, which surface topography preferably has an Rsk value that is greater than or equal to ?0.25 and/or an Rk value between 0.3 and 1.35 and/or Rpk value between 0.05 and 0.4 and/or an Rvk value between 0.2 and 1.2 and/or an Ra value between 0.1 and 0.4.
    Type: Application
    Filed: September 4, 2019
    Publication date: March 19, 2020
    Inventors: Norbert Huhn, Thomas Fetzer, Ulrich Lang, Ralph Meeuwenoord, Patrice Ribault
  • Publication number: 20200012197
    Abstract: A method localizes assembly errors during the arrangement and/or the assembly of in particular vibration-isolated structural elements, in particular of components of optical arrangements, preferably of microlithographic projection exposure apparatuses.
    Type: Application
    Filed: September 19, 2019
    Publication date: January 9, 2020
    Inventors: Thomas Niederhausen, Christoph Fetzer
  • Patent number: 10195694
    Abstract: A method for manufacturing at least one synchronizing ring includes providing a rough-turned blank made from a hardenable material that is in a not-hardened state and laser-cutting the rough-turned blank to form the at least one synchronizing ring, the laser cutting being performed with an energy chosen to be sufficient to selectively harden at least a portion of the material in a region along which the laser cutting occurs.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: February 5, 2019
    Assignee: Aktiebolaget SKF
    Inventors: Thomas Fetzer, Norbert Huhn, Ulrich Lang, Patrice Ribault
  • Publication number: 20150251276
    Abstract: A method for manufacturing at least one synchronizing ring includes providing a rough-turned blank made from a hardenable material that is in a not-hardened state and laser-cutting the rough-turned blank to form the at least one synchronizing ring, the laser cutting being performed with an energy chosen to be sufficient to selectively harden at least a portion of the material in a region along which the laser cutting occurs.
    Type: Application
    Filed: July 11, 2013
    Publication date: September 10, 2015
    Inventors: Thomas Fetzer, Norbert Huhn, Ulrich Lang, Patrice Ribault
  • Patent number: 6743404
    Abstract: A reactor for the catalytic oxidation of ammonia to form nitrogen oxides which has a noble metal gauze catalyst and a heat exchanger in that order in the direction of flow, a catalyst for the decomposition of N2O is located between the noble metal gauze catalyst and the heat exchanger and in a process for the catalytic decomposition of N2O in a gas mixture obtained in the preparation of nitric acid by catalytic oxidation of ammonia, where the N2O is decomposed catalytically over a catalyst of the decomposition of N2O, the hot gas mixture obtained from the catalytic oxidation of ammonia is brought to contact with the catalyst for the decomposition of N2O prior to subsequent cooling.
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: June 1, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Volker Schumacher, Gert Bürger, Thomas Fetzer, Michael Baier, Michael Hesse
  • Patent number: 6723295
    Abstract: A copper-containing catalyst of the composition of N2O contains a compound of the formula MxAl2O4, where M is Cu or a mixture of Cu and Zn and/or Mg and x is from 0.8 to 1.5. The novel catalyst is used in a process for the catalytic decomposition of pure N2O or N2O contained in gas mixtures, at elevated temperatures.
    Type: Grant
    Filed: April 11, 2001
    Date of Patent: April 20, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Michael Baier, Thomas Fetzer, Otto Hofstadt, Michael Hesse, Gert Bürger, Klaus Harth, Volker Schumacher, Hermann Wistuba, Bernhard Otto
  • Patent number: 6696389
    Abstract: The invention relates to a method and a device for cleaning flowing gases. To reduce the total emissions, nitrogen oxides, especially NO and NOx, are extracted at least partially from the gas to be scrubbed, in the temperature range from 50 and 300° C., preferably between 50 and 150° C. To extract the nitrogen oxides, an intermediate storage medium is used that is composed of a storage material and a supporting material for the storage material. The intermediate storage medium having in particular a composition of the formal chemical formula Ag.CuAl2O4 in an Al2O3 matrix, with the composition being a spinel or being of the spinel type, and with the composition having characteristic spinel lines in the x-ray spectrum, where 0≦x<1.
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: February 24, 2004
    Assignee: DaimlerChrysler AG
    Inventors: Walter Boegner, Rolf-Dirc Roitzheim, Martin Hartweg, Andrea Seibold, Thomas Fetzer, Bernd Morsbach
  • Patent number: 6444178
    Abstract: An exhaust gas purification device includes a porous body of catalytic material of the general formula AaBbO4 disposed in an exhaust gas stream of an engine. The porous body of catalytic material has a characteristic response temperature above which it is catalytically active to reduce pollutants in the presence of a reducing agent. The porous body stores at least 20% by volume hydrocarbons at temperatures below the response temperature. A represent at least one element selected from Mg, Ca, Mn, Fe, Ni, Co, Cu, Zn, Sn, Ti and A+B is less than 3, A is greater than 0 and B greater than 0.
    Type: Grant
    Filed: January 19, 2000
    Date of Patent: September 3, 2002
    Assignees: DaimlerChrysler AG, BASF Aktiengesellschaft
    Inventors: Martin Hartweg, Rolf-Dirc Roitzheim, Andrea Seibold, Leonhard Walz, Thomas Fetzer, Bernd Morsbach
  • Patent number: 6444181
    Abstract: In a process and an apparatus for avoiding encrustations in reactors or crystallizers (13), such as industrial crystallizers for suspensions (11), points of incidence (4) for the excitation of ultrasonic oscillations by sonotrodes (3) which are connected to electromechanical converters (2) are provided on the walls (6, 21) and on the base (7) of the crystallizer (13). The ultrasonic frequency is generated at high-frequency generators (1).
    Type: Grant
    Filed: September 26, 2000
    Date of Patent: September 3, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Udo Setzer, Bernhard Otto, Siegfried Bechtel, Richard van Gelder, Thomas Fetzer, Joachim Borgwart, Matthias Rauls, Christoph Gahn
  • Patent number: 6395244
    Abstract: A storage catalyst includes (1) a component that has a catalytic reducing action for nitrogen oxides at least in the presence of hydrocarbons, and (2) a component that stores NOx at least at temperatures of below 100° C. The catalytically active component is of the general chemical formula AaBbO4, where A is one or more divalent metals and B is one or more trivalent metals, and where a+b≦3 and a, b>0. The reaction enthalpy or the chemical activity between the catalytically active component and the NOx-storing component is low at least up to temperatures of 600° C.
    Type: Grant
    Filed: February 24, 2000
    Date of Patent: May 28, 2002
    Assignees: DaimlerChrysler AG, BASF Aktiengesellschaft
    Inventors: Martin Hartweg, Thomas Fetzer, Bernd Morsbach, Otto Kumberger
  • Patent number: 6255534
    Abstract: Carbonyl compounds of the formula where R1 is a hydrogen atom or an alkyl radical having from 1 to 3 carbon atoms, R2 is a hydrogen atom, an unsubstituted or C1-C3-alkyl-monosubstituted to -trisubstituted C2-C4-alkenyl radical or a radical of the formula where R3 is a hydrogen atom or together with R4 is an oxygen atom, R4 is the radical OR6 or together with R3 is an oxygen atom, R5 is a hydrogen atom, an alkyl radical having from 1 to 8 carbon atoms, an unsubstituted or C1-C3-alkyl-monosubstituted to -trisubstituted C2-C4-alkenyl radical or a cyclohexyl or cyclopentyl radical and R6 is an alkyl radical having from 1 to 4 carbon atoms, a cyclohexyl or cyclopentyl radical or a radical of the formula —CH2—CHO or —CH2—CH2—O—CH2—CHO, are prepared by gas-phase oxidation of methanol or alcohols of the formula where R1 and R5 are as defined above, by means of an oxygen-containing gas in the presence of copper- and/or silv
    Type: Grant
    Filed: February 1, 1999
    Date of Patent: July 3, 2001
    Assignee: BASF Aktiengesellschaft
    Inventors: Dirk Demuth, Thomas Fetzer, Volker Pratsch, Thomas Wendrich, Helmuth Menig, Ludwig Wambach, Klaus Harth
  • Patent number: 6200535
    Abstract: The present invention is directed to a purification device that includes a porous body and a catalyst. To reduce the emission of pollutants, a pollutant-containing stream of gas flows through the porous body.
    Type: Grant
    Filed: June 23, 1999
    Date of Patent: March 13, 2001
    Assignee: DaimlerChrysler AG
    Inventors: Martin Hartweg, Rolf-Dirc Roitzheim, Andrea Seibold, Leonhard Walz, Thomas Fetzer, Bernd Morsbach
  • Patent number: 6153161
    Abstract: NO.sub.x, where x is 1 and 2, in exhaust gases is reduced over heterogeneous catalysts with hydrocarbons, carbon monoxide, hydrogen or mixtures thereof in the presence of oxygen from 100 to 650.degree. C. and an absolute pressure of from 0.5 to 50 bar by a process in which the heterogeneous catalysts used are bimodal or polymodal compounds of the general formula IA.sub.1-x M.sub.2 O.sub.4 (I),which, if required, are doped with rare earth metals, noble metal, titanium, vanadium, molybdenum, tungsten or mixtures thereof, and whereA is magnesium, calcium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, tin or mixtures thereof,M is aluminum, gallium, indium, tin, chromium, manganese, iron, cobalt, nickel, copper, zinc or mixtures thereof andx is from 0 to 0.
    Type: Grant
    Filed: June 2, 1998
    Date of Patent: November 28, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Fetzer, Bernd Morsbach, Martin Hartweg, Ralf-Dirc Roitzheim, Andrea Seibold, Leonhard Walz
  • Patent number: 6153162
    Abstract: A process for the catalytic reduction of NO.sub.x, the reduction taking place in the presence of a catalyst which comprises(a) from 20 to 97 wt % of A.sub.2 O.sub.3,(b) from 1 to 40 wt % of CuO,(c) from 1 to 50 wt % of ZnO,(d) from 1 to 40 wt % of Ag,(e) from 0 to 2 wt % of Pt,(f) from 0 to 20 wt % of oxides of rare earth metals, elements of the 3rd subgroup of the Periodic Table of the Elements or mixtures thereof,based on the total weight of the components (a) to (e), which adds up to 100 wt %, wherein, in each case, up to half the weight of the component (a) may be replaced by Fe.sub.2 O.sub.3, Cr.sub.2 O.sub.3, Ga.sub.2 O.sub.3 or mixtures thereof, of the component (b) by CoO, of the component (c) by MgO, of the component (d) by Au and of the component (e) by Pd, Ru, Os, Ir, Rh, Re or mixtures thereof, is used for reducing NO.sub.x, especially in combustion off-gases, the components (a), (b) and (c) forming a spinel which is doped with the components (d), (e) and (f).
    Type: Grant
    Filed: June 16, 1999
    Date of Patent: November 28, 2000
    Assignees: BASF Aktiengesellschaft, Daimler Benz Aktiengesellschaft
    Inventors: Thomas Fetzer, Bernd Morsbach, Otto Kumberger, Martin Hartweg, Rolf-Dirc Roitzheim, Andrea Seibold, Leonhard Walz
  • Patent number: 6133482
    Abstract: In a process for preparing carbonyl compounds of the formula ##STR1## where R.sup.1 is a hydrogen atom or an alkyl radical having from 1 to 3 carbon atoms, R.sup.2 is a hydrogen atom or a radical of the formula ##STR2## where R.sup.3 is a hydrogen atom or together with R.sup.4 is an oxygen atom, R.sup.4 is the radical OR.sup.6 or together with R.sup.3 is an oxygen atom, R.sup.5 is a hydrogen atom, an alkyl radical having from 1 to 8 carbon atoms or a cyclohexyl or cyclopentyl radical and R.sup.6 is an alkyl radical having from 1 to 4 carbon atoms, a cyclohexyl or cyclopentyl radical or a radical of the formula --CH.sub.2 --CHO or --CH.sub.2 --CH.sub.2 --O--CH.sub.2 --CHO, by gas-phase oxidation of methanol or alcohols of the formula ##STR3## where R.sup.1 and R.sup.5 are as defined above and R.sup.7 is a hydrogen atom or a radical OR.sup.8 and R.sup.8 is a hydrogen atom, an alkyl radical having from 1 to 4 carbon atoms, a cyclohexyl or cyclopentyl radical or a radical for the formula --CH.sub.2 --CH.sub.
    Type: Grant
    Filed: June 16, 1999
    Date of Patent: October 17, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Fetzer, Dirk Demuth, Heinz Rutter, Helmuth Menig, Peter Resch, Wilhelm Ruppel, Harro Wache
  • Patent number: 6124234
    Abstract: Catalysts prepared by combining M--Al.sub.2 O.sub.4 where M is an element of Group Ib, VIIb or VIII of the Periodic Table of the Elements with tin, lead, an element of group IIa or IIb of the Periodic Table of the Elements as oxide or salt or in elemental form and calcining at 300-1300.degree. C. under 0.1-200 bar and the process for preparing them.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: September 26, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Fetzer, Wolfgang Buechele, Matthias Irgang, Bernhard Otto, Hermann Wistuba, Gert Buerger
  • Patent number: 6072087
    Abstract: The present invention relates to a process for the preparation of carbonyl compounds of the formula ##STR1## in which R.sup.1 denotes a hydrogen atom or an alkyl radical containing from 1 to 3 carbon atoms, R.sup.2 denotes a hydrogen atom or a radical of the formula ##STR2## in which R.sup.3 denotes a hydrogen atom or, together with R.sup.4, an oxygen atom, R.sup.4 denotes the radical OR.sup.6 or, together with R.sup.3, an oxygen atom, R.sup.5 denotes a hydrogen atom or an alkyl radical containing from 1 to 8 carbon atoms or a cyclohexyl or cyclopentyl radical, and R.sup.6 denotes an alkyl radical containing from 1 to 4 carbon atoms, a cyclohexyl or cyclopentyl radical or a radical of the formula--CH.sub.2 --CHO or --CH.sub.2 --CH.sub.2 --O--CH.sub.2 --CHO,by gas-phase oxidation of methanol or alcohols of the formula ##STR3## in which R.sup.1 and R.sup.5 have the meanings specified above and R.sup.7 denotes a hydrogen atom or a radical OR.sup.8, and R.sup.
    Type: Grant
    Filed: June 16, 1999
    Date of Patent: June 6, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Fetzer, Dirk Demuth, Heinz Rutter, Helmuth Menig, Peter Resch, Wilhelm Ruppel, Harro Wache
  • Patent number: 6056928
    Abstract: The invention relates to a process for removing nitrogen oxides from a gas stream containing same, which comprises passing the gas stream(A) through a stage for absorbing the nitrogen oxides other than N.sub.2 O in an absorbent or reacting the nitrogen oxides other than N.sub.2 O with an absorbent at a pressure of from 1,5 to 20 bar, and(B) through a stage for reducing the amount of N.sub.2 O, preferably employing the pressure level of step A, and to apparatus therefor and the use thereof.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: May 2, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Fetzer, Eckhart Wagner, Emil Roth, Wilhelm Ruppel, Hermann Wistuba, Bernhard Otto, Volker Schumacher, Gert Burger
  • Patent number: 6030589
    Abstract: A method of catalytically reducing nitrogen oxides (NO.sub.x) and oxidizing hydrocarbons or carbon monoxide in exhaust gases of internal combustion engines or combustion power plants using a catalyst comprising a magnesium oxide/copper oxide/aluminum oxide spinel or a copper-impregnated copper oxide/aluminum oxide spinel.
    Type: Grant
    Filed: December 12, 1996
    Date of Patent: February 29, 2000
    Assignee: Daimlerchrysler AG
    Inventors: Martin Hartweg, Andrea Seibold, Leonhard Walz, Thomas Fetzer, Bernd Morsbach
  • Patent number: 6027703
    Abstract: The present invention relates to a method for operating a catalyst for gases, especially for exhaust gases of stoichiometrically operated gasoline engines, wherein a catalyst is exposed to a gas stream and pollutants are catalytically converted. To improve the elimination of pollutants in the starting phase, hydrocarbons present in the gas are temporarily stored by the catalyst at temperatures below a response temperature of the catalyst, particularly below 200.degree. C., and preferably below 150.degree. C. The hydrocarbons are then released at temperatures above the response temperature and the pollutants, such as nitrogen oxides, are catalytically converted with reducing agents, such as hydrocarbons, carbon monoxide and mixtures thereof. The catalyst is a spinel, such as (MgCu)Al.sub.2 O.sub.4, which may also include a catalytically active species, such as WO.sub.3, V.sub.2 O.sub.5 and TiO.sub.2.
    Type: Grant
    Filed: December 12, 1996
    Date of Patent: February 22, 2000
    Assignee: DaimlerChrysler AG
    Inventors: Martin Hartweg, Rolf-Dirc Roitzheim, Andrea Seibold, Leonhard Walz, Thomas Fetzer, Bernd Morsbach