Patents by Inventor Martin Weitz
Martin Weitz 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: 20230375760Abstract: In one aspect, a method for producing a diffractive optical element for beam shaping of a laser beam having a first wavelength of at least 100 nm includes providing a laser mirror, the laser mirror having a layered structure made of a substrate, a dielectric layer and optionally an absorption layer, the dielectric layer resting against the substrate or the absorption layer being located between the substrate and the dielectric layer. The method also includes creating a plurality of bulges of the dielectric layer by treating the laser mirror with a series of focused heating laser beams having a second wavelength (?2), the plurality of bulges having a height perpendicular to the dielectric layer, and at least one bulge having a height of at least half the first wavelength (?1).Type: ApplicationFiled: February 18, 2021Publication date: November 23, 2023Inventors: Martin WEITZ, Christian WAHL, David DUNG
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Patent number: 11344660Abstract: The present invention relates to an apparatus comprising at least one multi-lumen tube, wherein the tube has a first group of lumens and a second group of lumens wherein the lumens of the second group are arranged around the lumen(s) of the first group, and wherein the lumen(s) of the first group serve the transportation of at least one first fluid, and wherein the lumens of the second group are filled with at least one functional fluid, wherein the apparatus furthermore comprises at least one actuator which is in communication with at least one of the second lumens and is configured such that at least one property of the functional fluid can be changed by means of the actuator.Type: GrantFiled: September 9, 2015Date of Patent: May 31, 2022Assignee: FRESENIUS MEDICAL CARE DEUTSCHLAND GMBHInventors: Alexander Heide, Arne Peters, Martin Weitz
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Publication number: 20170296737Abstract: The present invention relates to an apparatus comprising at least one multi-lumen tube, wherein the tube has a first group of lumens and a second group of lumens wherein the lumens of the second group are arranged around the lumen(s) of the first group, and wherein the lumen(s) of the first group serve the transportation of at least one first fluid, and wherein the lumens of the second group are filled with at least one functional fluid, wherein the apparatus furthermore comprises at least one actuator which is in communication with at least one of the second lumens and is configured such that at least one property of the functional fluid can be changed by means of the actuator.Type: ApplicationFiled: September 9, 2015Publication date: October 19, 2017Applicant: FRESENIUS MEDICAL CARE DEUTSCHLAND GMBHInventors: Alexander HEIDE, Arne PETERS, Martin WEITZ
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Patent number: 8811449Abstract: The invention relates to a light source, comprising an optical resonator (1) and an optical medium (2) arranged therein that can be excited so as to emit light, wherein the optical medium (2) comprises at least one two-level system, in particular a two-level system that is not population-inverted, having an at least metastable lower state, and the optical length of the resonator (1) comprising at least one curved mirror (1) is selected such that the free spectral bandwidth of the resonator is equal to or greater than the absorption bandwidth and/or fluorescence bandwidth of the optical medium (2) and only a single longitudinal mode and a plurality of transversal modes of the resonator (1) are arranged within the fluorescence bandwidth.Type: GrantFiled: September 21, 2010Date of Patent: August 19, 2014Assignee: Rheinische Friedrich-Willhelms Universitaet BonnInventors: Frank Vewinger, Martin Weitz, Jan Klaers
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Publication number: 20130064264Abstract: The invention relates to a light source, comprising an optical resonator (1) and an optical medium (2) arranged therein that can be excited so as to emit light, wherein the optical medium (2) comprises at least one two-level system, in particular a two-level system that is not population-inverted, having an at least metastable lower state, and the optical length of the resonator (1) comprising at least one curved mirror (1) is selected such that the free spectral bandwidth of the resonator is equal to or greater than the absorption bandwidth and/or fluorescence bandwidth of the optical medium (2) and only a single longitudinal mode and a plurality of transversal modes of the resonator (1) are arranged within the fluorescene bandwidth.Type: ApplicationFiled: September 21, 2010Publication date: March 14, 2013Inventors: Frank Vewinger, Martin Weitz, Jan Klaers
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Patent number: 6038055Abstract: For the generation of amplified, phase-coherent light pulses, a sequence of phase-coherent, equidistant input light pulses (21) is coupled into a resonator device (1) with at least two resonator mirrors (11, 14), forming a light path (10) with a predetermined resonator length, in such a way that the coupled in input light pulses in the resonator device are linearly superimposed in succession to form at least one circulating light pulse, whereby the circulating light pulse is coupled out of the resonator device as an output light pulse (31) as soon as the circulating light pulse has reached a preset minimum level of energy.Type: GrantFiled: November 12, 1998Date of Patent: March 14, 2000Assignee: Max-Planck-Gesellschaft zur Forderung der Wissenschaften e.V.Inventors: Theodor Hansch, Tilman Heupel, Martin Weitz
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Patent number: 4806679Abstract: 1,4-Diacyloxybut-2-enes and 3,4-diacyloxybut-1-enes are converted into one another in the gas phase or liquid phase at from 100.degree. to 350.degree. C. under atmospheric or superatmospheric pressure in the presence of a zeolite as a catalyst.Type: GrantFiled: July 23, 1984Date of Patent: February 21, 1989Assignee: BASF AktiengesellschaftInventors: Wolfgang Hoelderich, Rolf Fischer, Otto Hertel, Wolf D. Mross, Hans-Martin Weitz
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Patent number: 4780448Abstract: A catalyst containing copper and silica is prepared by a process in which an aqueous alkali metal silicate solution containing from 1 to 26% by weight of SiO.sub.2 is brought to a pH of from 0.5 to 2.0 with nitric acid, an aqueous copper nitrate solution containing from 5 to 15% by weight of Cu is added, after the addition of the nitric acid, so that a clear solution containing from 0.18 to 3.0 moles of Cu per mole of SiO.sub.2 is formed, the resulting solution is mixed with an aqueous alkali metal carbonate solution at from 40.degree. to 80.degree. C., the pH of the mixture being kept at from 7.5 to 8.5, and the precipitated material is separated off, dried, calcined by heating at from 250.degree. to 400.degree. C. and pressed in a conventional manner to give catalyst moldings. The catalyst thus obtained is used for the hydrogenation of dialkyl dicarboxylates to diols.Type: GrantFiled: January 30, 1987Date of Patent: October 25, 1988Assignee: BASF AktiengesellschaftInventors: Franz J. Broecker, Rolf Fischer, Klaus-Dieter Malsch, Wolfgang Reiss, Rolf Schnabel, Hans-Martin Weitz
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Patent number: 4618704Abstract: Acyloxy-2-butenes of the formula ##STR1## where R.sup.1, R.sup.3 and R.sup.4 are each hydrogen or alkyl of 1 to 5 carbon atoms, R.sup.2 is alkyl of 1 to 5 carbon atoms, R.sup.5 is hydrogen, alkyl of 1 to 5 carbon atoms or R.sup.6 --CO--O, and R.sup.6 and R.sup.7 are each hydrogen, alkyl of 1 to 5 carbon atoms, phenyl or cyclohexyl, the preparation of these acyloxy-2-butenes by reaction of 1-acyloxy-1,3-butadienes of the formula ##STR2## with carboxylic acids of the formula R.sup.7 --COOH and oxygen at 50.degree.-180.degree. C. in the presence of catalysts containing palladium or platinum, and the use of the compounds of the formula I, where R.sup.1, R.sup.3, R.sup.4 and R.sup.5 are hydrogen, R.sup.2 and R.sup.6 are methyl and R.sup.7 is methyl or ethyl, for the preparation of 4-acyloxytiglic aldehydes.Type: GrantFiled: April 3, 1979Date of Patent: October 21, 1986Assignee: BASF AktiengesellschaftInventors: Hans-Martin Weitz, Rolf Fischer
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Patent number: 4599458Abstract: 2-Methylalk-2-enals of the formula ##STR1## where R.sup.1 and R.sup.2 are each hydrogen, alkyl or an aromatic radical, are prepared by isomerization of an acrolein derivative of the formula ##STR2## with a zeolite catalyst, an aluminum silicate and/or an aluminum phosphate.Type: GrantFiled: June 7, 1985Date of Patent: July 8, 1986Assignee: BASF AktiengesellschaftInventors: Rolf Fischer, Wolfgang Hoelderich, Franz Merger, Wolf D. Mross, Hans-Martin Weitz
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Patent number: 4594462Abstract: Butane-1,4-diol is prepared by catalytic hydrogenation of dibutyl succinate by a process in which hydrogenation is terminated before complete conversion is reached, butanol is distilled off from the reaction mixture, the liquid distillation residue is cooled to below 108.degree. C., the upper phase, which is formed as a result of phase separation and essentially consists of dibutyl succinate, is recycled to the hydrogenation, and the butane-1,4-diol is obtained from the lower phase, which essentially consists of this compound, by fractional distillation under reduced pressure.Type: GrantFiled: June 26, 1985Date of Patent: June 10, 1986Assignee: BASF AktiengesellschaftInventors: Rolf Schnabel, Hans-Martin Weitz
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Patent number: 4543417Abstract: .omega.,.omega.-Diacyloxy-2,6-dimethyl-octatrienoates and -octatrienals, as novel bifunctional asymmetric C.sub.10 building blocks for terpene syntheses, which possess a formyl or alkoxycarbonyl group at one chain end and 2 geminal acyloxy groups at the other, and a process for their preparation from readily obtainable industrial C.sub.5 building blocks and their use for the synthesis of terpene compounds by carbonyl olefination under conventional conditions.Type: GrantFiled: November 28, 1983Date of Patent: September 24, 1985Assignee: BASF AktiengesellschaftInventors: Klaus Schmieder, Joachim Paust, Rolf Fischer, Hans-Martin Weitz
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Patent number: 4529814Abstract: Acyloxyalkadienoates of the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.6 and R.sup.7 are each hydrogen or a hydrocarbon radical, and R.sup.1 may furthermore be R.sup.6 --O--CO--, R.sup.4 is hydrogen or a hydrocarbon radical, but may only be hydrogen if x is 0, R.sup.5 is hydrogen, or is ##STR2## if x is 0, and x is 0 or 1, and their preparation.Type: GrantFiled: September 17, 1982Date of Patent: July 16, 1985Assignee: BASF AktiengesellschaftInventors: Rolf Fischer, Hans-Martin Weitz
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Patent number: 4521342Abstract: 2-alkyl-4,4-diacyloxybut-2-enals of the formula ##STR1## where R.sup.1 is alkyl and R.sup.2 and R.sup.3 are each hydrogen or an aliphatic, cycloaliphatic or aromatic radical, are prepared by a process wherein a 2-alkyl-2,4-diacyloxybut-3-enal of the formula ##STR2## is treated with an aliphatic carboxylic acid.Type: GrantFiled: March 7, 1983Date of Patent: June 4, 1985Assignee: BASF AktiengesellschaftInventors: Rolf Fischer, Hans-Martin Weitz, Joachim Paust
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Patent number: 4513150Abstract: But-2-ene-1,4-diones substituted in the 1,4-positions, of the formula ##STR1## where R.sup.1 and R.sup.2 are each an aliphatic hydrocarbon radical of 1 to 17 carbon atoms, are prepared by a process in which a 2,5-disubstituted furan of the formula ##STR2## where R.sup.1 and R.sup.2 have the above meaning, is oxidized with a percarboxylic acid in the presence of a carboxylic acid.Type: GrantFiled: March 23, 1984Date of Patent: April 23, 1985Assignee: BASF AktiengesellschaftInventors: Rolf Fischer, Hans-Martin Weitz, Hardo Siegel
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Patent number: 4506096Abstract: 2-Alkyl-2,4-diacyloxy-but-3-enals of the formula ##STR1## where R.sup.1 is alkyl and R.sup.2 is hydrogen, alkyl, a cycloaliphatic radical or an aromatic radical, are prepared by reacting a buta-1,3-diene of the formula ##STR2## with an oxygen donor. The new compounds are valuable intermediates in the preparation of terpenes, e.g. retinal, .beta.-carotin and apocarotinoids.Type: GrantFiled: March 10, 1983Date of Patent: March 19, 1985Assignee: BASF AktiengesellschaftInventors: Hans-Martin Weitz, Rolf Fischer, Joachim Paust
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Patent number: 4504676Abstract: 1,4-diacyloxybutenes are prepared by reacting a 1,3-butadiene with a carboxylic acid and oxygen in the presence of a catalyst in a reactor, by a process in which the 3,4-diacyloxybutene formed as a by-product in the reaction is separated off from the reaction mixture, and some or all of this 3,4-diacyloxybutene is recycled to the reactor.Type: GrantFiled: March 9, 1984Date of Patent: March 12, 1985Assignee: BASF AktiengesellschaftInventors: Rolf Schnabel, Gerd Kissau, Hans-Martin Weitz, Rolf Fischer
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Patent number: 4480123Abstract: A process for preparing diacyloxyalkadienes of the formula ##STR1## where R.sup.1 to R.sup.6 are each hydrogen or a hydrocarbon radical, which contain one or more hydrocarbon radicals having one or more non-conjugated double bonds, by reacting an aliphatic triene of the formula ##STR2## in which R.sup.1 to R.sup.6 have the same meanings given above with a carboxylic acid of the formulaR.sup.7 -COOHin which R.sup.7 has the same meaning given above, in the presence of a catalyst which contains palladium, platinum or salts of these metals and in the presence of oxygen.Type: GrantFiled: July 25, 1983Date of Patent: October 30, 1984Assignee: BASF AktiengesellschaftInventors: Rolf Fischer, Hans-Martin Weitz
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Patent number: 4468525Abstract: A process for the preparation of a diacyloxyhexadiene of the formula ##STR1## where X is R.sup.9 -CO- and R.sup.1 to R.sup.9 are hydrogen or alkyl of 1 to 3 carbon atoms, by reacting a hexatriene of the formula ##STR2## with oxygen and a carboxylic acid of the formula R.sup.9 COOH in the presence of a catalyst which contains palladium, platinum or a salt of these metals.Type: GrantFiled: April 29, 1983Date of Patent: August 28, 1984Assignee: BASF AktiengesellschaftInventors: Hans-Martin Weitz, Rolf Fischer
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Patent number: 4466922Abstract: 3-Alkyl-3-acyloxy-4-hydroxybut-1-enes are prepared by a process in which a 3-alkyl-3,4-epoxybut-1-ene is treated with a carboxylic acid and a copper salt of a carboxylic acid.Type: GrantFiled: September 13, 1982Date of Patent: August 21, 1984Assignee: BASF AktiengesellschaftInventors: Hans-Martin Weitz, Rolf Fischer