Patents by Inventor Ernst Hofmann

Ernst Hofmann 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: 20200241088
    Abstract: A system including an NMR spectrometer (1) with a flow cell (2) analyzing a first liquid test sample (P1), a distributing device (3) with a multi-way valve, plural assemblies interconnected via fluid lines through the distributing device, a cannula (5) taking test samples from a storage vessel (5a), a sample loop (6) temporarily storing a further test sample (P2), and a pump device (7) pumping liquid (S) into the system. The valve arrangement a) decouples the sample loop with the temporarily stored further test sample and, simultaneously, b) decouples the flow cell with the first test sample from all fluid lines to the distributing device; and c) connects the cannula to the pump device for a simultaneous purging step or to the flow cell for removing the first test sample into a receiving vessel (5b; 5c) or to the sample loop for receiving a subsequent test sample.
    Type: Application
    Filed: January 28, 2020
    Publication date: July 30, 2020
    Inventors: Ernst Ulrich BRAUMANN, Martin HOFMANN
  • Patent number: 10655672
    Abstract: The disclosure relates to a method for producing an angular contact roller bearing with unilaterally delimiting rims. The disclosure also relates to multiple variants of a device for assembling the angular contact roller bearing. The method may include conically forming an inner raceway into a cylindrical section of an outer shell surface of an inner bearing ring such that the inner raceway is inclined relative to the bearing axis of rotation (AL) and is delimited at one end by a rim, conically forming an outer raceway into a cylindrical section of an inner shell surface of an outer bearing ring such that the outer raceway is inclined relative to the bearing axis of rotation (AL) and is delimited at one end by a rim, and assembling the inner and outer bearing rings and a multiplicity of roller-type rolling bodies, which roll on the raceways of said bearing rings, in accordance with an eccentric assembly method.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: May 19, 2020
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Heinrich Hofmann, Reinhard Rumpel, Ernst Geiger, Rainer Eidloth
  • Publication number: 20190162238
    Abstract: A method and device for assembly of an angular contact roller bearing, including an inner bearing ring having an inner raceway arranged on the outer peripheral surface of the inner bearing ring, at an angle to the bearing rotation axis, and a rim delimiting said raceway at the smallest diameter thereof, an outer bearing ring having an outer raceway arranged on the inner peripheral surface of the outer bearing ring, also at an angle to the bearing rotation axis, and a rim delimiting the raceway at the largest diameter thereof, and a plurality of rolling element bodies, arranged between the bearing rings and rolling on the raceways thereof held at regular distances in the circumferential direction by a bearing cage.
    Type: Application
    Filed: June 19, 2017
    Publication date: May 30, 2019
    Applicant: Schaeffler Technologies AG & Co. KG
    Inventors: Reinhard Rumpel, Heinrich Hofmann, Ernst Geiger, Rainer Eidloth
  • Patent number: 8053499
    Abstract: The present invention relates to a polyoxymethylene molding composition comprising (A) 0.1-5.0% by weight of colorant, (B) 0.01-0.5% by weight of a nitrogen-containing stabilizer, (C) 0.05-1% by weight of an ester of a polyhydric alcohol and at least one fatty acid, and (D) 0.001-0.5% by weight of a metal salt of a fatty acid, and (I) polyoxymethylene polymer and, where appropriate, up to 40% by weight of other conventional additives, and variants of this constitution in advantageous versions. In the case of these polyoxymethylene molding compositions the selection of the colorants is no longer restricted to conventional colorants suitable particularly for POM. The products produced therewith are particularly stable during processing and feature low formaldehyde emission, defect-free surfaces, and high color fastness.
    Type: Grant
    Filed: May 22, 2008
    Date of Patent: November 8, 2011
    Assignee: Ticona GmbH
    Inventors: Stefan Disch, Gerhard Reuschel, Ernst Hofmann, Klaus Kurz
  • Patent number: 7906594
    Abstract: The invention relates to a process for preparation of polymer blends comprising at least one polyoxymethylene and at least one thermoplastic elastomer, where the thermoplastic elastomer is micropelletized by a pelletizing process and the pellets obtained in a) are dispersed in the polyoxymethylene matrix via melting of the components and mixing of these at low shear forces, and also to the use of micropelletized thermoplastic elastomers for preparation of polyoxymethylenes with low formaldehyde emission.
    Type: Grant
    Filed: September 13, 2006
    Date of Patent: March 15, 2011
    Assignee: Ticona GmbH
    Inventors: Karl-Friedrich Mück, Ernst Hofmann, Michael Hoffmockel
  • Publication number: 20080287580
    Abstract: The present invention relates to a polyoxymethylene molding composition comprising (A) 0.1-5.0% by weight of colorant, (B) 0.01-0.5% by weight of a nitrogen-containing stabilizer, (C) 0.05-1% by weight of an ester of a polyhydric alcohol and at least one fatty acid, and (D) 0.001-0.5% by weight of a metal salt of a fatty acid, and (I) polyoxymethylene polymer and, where appropriate, up to 40% by weight of other conventional additives, and variants of this constitution in advantageous versions. In the case of these polyoxymethylene molding compositions the selection of the colorants is no longer restricted to conventional colorants suitable particularly for POM. The products produced therewith are particularly stable during processing and feature low formaldehyde emission, defect-free surfaces, and high color fastness.
    Type: Application
    Filed: May 22, 2008
    Publication date: November 20, 2008
    Applicant: TICONA GmbH
    Inventors: Stefan Disch, Gerhard Reuschel, Ernst Hofmann, Klaus Kurz
  • Publication number: 20070060715
    Abstract: The invention relates to a process for preparation of polymer blends comprising at least one polyoxymethylene and at least one thermoplastic elastomer, where the thermoplastic elastomer is micropelletized by a pelletizing process and the pellets obtained in a) are dispersed in the polyoxymethylene matrix via melting of the components and mixing of these at low shear forces, and also to the use of micropelletized thermoplastic elastomers for preparation of polyoxymethylenes with low formaldehyde emission.
    Type: Application
    Filed: September 13, 2006
    Publication date: March 15, 2007
    Applicant: TICONA GmbH
    Inventors: Karl-Friedrich Muck, Ernst Hofmann, Michael Hoffmockel
  • Publication number: 20030195280
    Abstract: The present invention relates to a polyoxymethylene molding composition comprising
    Type: Application
    Filed: May 28, 2003
    Publication date: October 16, 2003
    Inventors: Stefan Disch, Gerhard Reuschel, Ernst Hofmann, Klaus Kurz
  • Publication number: 20030162912
    Abstract: The present invention relates to a polyoxymethylene molding composition comprising:
    Type: Application
    Filed: March 25, 2003
    Publication date: August 28, 2003
    Inventors: Stefan Disch, Kurt Witan, Ernst Hofmann, Klaus Kurz
  • Patent number: 6548628
    Abstract: The present invention relates to single- or multilayer films and one or more layers comprising at least one polyolefin molding composition containing at least one polyolefin derived from at least one olefin having at least 2 carbon atoms, of the formula Ra—CH═CH—Rb, in which Ra and Rb are identical or different and are a hydrogen atom or a straight-chain or branched C1-C15-alkyl radical, or Ra and Rb, together with the atoms connecting them, form a ring or ring system, and the polyolefin has been prepared by means of metallocene catalysts. The present invention furthermore relates to a process for the production of films and layers in which a polyolefin molding composition having a particle size of from 20 &mgr;m to 5000 &mgr;m is used or prepared. The shaped polyolefin molding composition is melt-mixed with at least one additive and shaped. The melt-mixed and shaped material is melted at a temperature of from 150° C. to 300° C.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: April 15, 2003
    Assignee: Basell Polyolefine GmbH
    Inventors: Andreas Winter, Ernst Hofmann, Gerhard Wieners, Bernd Bachmann
  • Publication number: 20020182428
    Abstract: The present invention relates to single- or multilayer films and one or more layers comprising at least one polyolefin molding composition containing at least one polyolefin derived from at least one olefin having at least 2 carbon atoms, of the formula Ra—CH═CH—Rb, in which Ra and Rb are identical or different and are a hydrogen atom or a straight-chain or branched C1-C15-alkyl radical, or Ra and Rb, together with the atoms connecting them, form a ring or ring system, and the polyolefin has been prepared by means of metallocene catalysts. The present invention furthermore relates to a process for the production of films and layers in which a polyolefin molding composition having a particle size of from 20 &mgr;m to 5000 &mgr;m is used or prepared. The shaped polyolefin molding composition is melt-mixed with at least one additive and shaped. The melt-mixed and shaped material is melted at a temperature of from 150° C. to 300° C.
    Type: Application
    Filed: December 20, 1996
    Publication date: December 5, 2002
    Inventors: ANDREAS WINTER, ERNST HOFMANN, GERHARD WIENERS, BERND BACHMANN
  • Patent number: 5039817
    Abstract: Pure N-vinyl-2-pyrrolidone is prepared by treating the crude N-vinyl-2-pyrrolidone with an acid ion exchanger.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: August 13, 1991
    Assignee: BASF Aktiengesellschaft
    Inventors: Ruprecht Kroker, Guenther Mueller, Ernst Hofmann
  • Patent number: 4876275
    Abstract: 3,4-dihydro-2H-pyrans of the formula I ##STR1## where R.sup.1 is C.sub.4 -C.sub.20 -alkyl, C.sub.4 -C.sub.20 -alkoxyalkyl, aryl or C.sub.7 -C.sub.20 -arylalkyl, or is aryl or C.sub.7 -C.sub.20 -arylalkyl which bears from one to three substituents selected from the group consisting of halogen, C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -haloalkyl, C.sub.1 -C.sub.8 -alkoxy or C.sub.1 -C.sub.8 -haloalkoxy, R.sup.2 is hydrogen or C.sub.1 -C.sub.4 -alkyl, R.sup.3 is aryl, or aryl bearing from one to three substituents selected from the group consisting of halogen, C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -haloalkyl, C.sub.1 -C.sub.8 -alkoxy or C.sub.1 -C.sub.8 -haloalkoxy, or the radical ##STR2## where R.sup.4, R.sup.5 and R.sup.6 are hydrogen or C.sub.1 -C.sub.4 -alkyl, R.sup.7 is phenyl or benzoyl, or phenyl or benzoyl bearing from one to three substituents selected from the group consisting of halogen, C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -haloalkyl, C.sub.1 -C.sub.8 -alkoxy and C.sub.1 -C.sub.
    Type: Grant
    Filed: April 1, 1988
    Date of Patent: October 24, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Walter Himmele, Hans Theobald, Franz Merger, Ernst Hofmann, Christoph Kuenast, Peter Hofmeister
  • Patent number: 4013825
    Abstract: Manufacture of insoluble polyvinyl lactams in the absence of oxygen and in the presence of .alpha.- or .beta.-ketocarboxylic acids or esters thereof.
    Type: Grant
    Filed: July 3, 1975
    Date of Patent: March 22, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Walter Denzinger, Ernst Hofmann, Karl Herrle
  • Patent number: 3992562
    Abstract: Manufacture of insoluble polyvinyl lactams by polymerization in the absence of oxygen and in the presence of sulfur compounds having a functionality of less than 6.
    Type: Grant
    Filed: July 7, 1975
    Date of Patent: November 16, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Walter Denzinger, Ernst Hofmann, Karl Herrle
  • Patent number: 3975400
    Abstract: Method of producing .gamma.-butyrolactams by reacting .gamma.-butyrolactones with ammonia in the presence or absence of water at elevated temperatures and pressures. The reaction is carried out continuously at temperatures ranging from 180.degree. to 340.degree.C whilst maintaining pressures which are at least 10 percent higher than the pressure equal to the sum of the partial pressures of the reactants at the temperature used. .gamma.-Butyrolactams are valuable intermediates, for example in the manufacture of polymers, pharmaceuticals and solvents.
    Type: Grant
    Filed: February 21, 1973
    Date of Patent: August 17, 1976
    Assignee: Badische Anilin- & Soda-Fabrik Aktiengesellschaft
    Inventors: Walter Himmele, Ernst Hofmann, Herwig Hoffmann, Reinhold Plass
  • Patent number: 3933766
    Abstract: Manufacture of insoluble poly-N-vinyl-pyrrolidone-2 or copolymers of N-vinylpyrrolidone-2 in the presence of a difunctional crosslinker by heating the reaction solution at temperatures above 80.degree.C and completing the reaction at the boiling temperature of water.
    Type: Grant
    Filed: November 9, 1973
    Date of Patent: January 20, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Ernst Hofmann, Karl Herrle