Patents by Inventor Uwe Lehmann
Uwe Lehmann 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: 9775786Abstract: A one-part self-etching, self-priming dental adhesive having a pH of at most 2, which comprises an aqueous mixture containing (i) one or more polymerizable monomers optionally containing an acidic group, (ii) optionally one or more organic or inorganic acids, (iii) a polymerization initiator, and (iv) a thermal polymerisation inhibitor of the following formula (I): ?wherein R?1 represents a hydrogen atom, or a saturated hydrocarbon group having 1 to 18 carbon atoms. R?2, which may be the same or different if more than one R?2 is present, independently represent a saturated hydrocarbon group having 1 to 18 carbon atoms, and c represents an integer of from 1 to 4.Type: GrantFiled: December 23, 2014Date of Patent: October 3, 2017Inventors: Joachim E Klee, Uwe Lehmann
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Patent number: 9770395Abstract: Non-aqueous dental adhesive comprising a mixture containing (i) one or more polymerizable monomers optionally containing an acidic group, (ii) a polymerization initiator, and (iii) a thermal polymerization inhibitor of the following formula (I) wherein R?1 represents a hydrogen atom, or a saturated hydrocarbon group having 1 to 18 carbon atoms. R?2, which may be the same or different if more than one R?2 is present, independently represent a saturated hydrocarbon group having 1 to 18 carbon atoms, and c represents an integer of from 1 to 4, and (iv) optionally an organic solvent.Type: GrantFiled: September 14, 2009Date of Patent: September 26, 2017Assignee: Dentsply Detrey GmbHInventors: Joachim E. Klee, Uwe Lehmann
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Patent number: 9507239Abstract: A device for frequency conversion of a first laser beam generated with a first frequency. The device has a first crystal for generating a second laser beam having a second frequency, which differs from the first frequency. The second laser beam propagates parallel to the first laser beam after leaving the first crystal. A second crystal, which generates from the first and second laser beams a third laser beam having a different third frequency. An optical deflection device influences the relative beam position between first and second laser beams such that the first and second laser beams, before entering into the second crystal, propagate at an angle with respect to one another, which angle differs from zero, and enter in a manner spaced apart from one another at an entrance surface of the second crystal and intersect within the second crystal with at the same time collinear phase matching.Type: GrantFiled: February 20, 2015Date of Patent: November 29, 2016Assignee: Rofin-Sinar Laser GmbHInventors: Uwe Lehmann, Axel Reiser
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Publication number: 20160072247Abstract: A device for frequency conversion of a first laser beam generated with a first frequency. The device has a first crystal for generating a second laser beam having a second frequency, which differs from the first frequency. The second laser beam propagates parallel to the first laser beam after leaving the first crystal. A second crystal, which generates from the first and second laser beams a third laser beam having a different third frequency. An optical deflection device influences the relative beam position between first and second laser beams such that the first and second laser beams, before entering into the second crystal, propagate at an angle with respect to one another, which angle differs from zero, and enter in a manner spaced apart from one another at an entrance surface of the second crystal and intersect within the second crystal with at the same time collinear phase matching.Type: ApplicationFiled: February 20, 2015Publication date: March 10, 2016Inventors: Uwe Lehmann, Axel Reiser
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Patent number: 9254246Abstract: Self-adhesive dental restorative composition comprising (i) 10 to 40 percent by weight based on the total weight of the composition of a mixture of hydrolysis-stable polymerizable monomers of the following formula (I): wherein R is a m+n valent organic group having 1 to 20 carbon atoms and optionally 1 to 5 atoms selected from the group of nitrogen, oxygen and sulfur atoms; A independently represents a moiety of the following formula (II): wherein L is a hydrogen atom, a C1-6 alkyl group, a C3-8 cycloalkyl group, a C6-14 aryl group or a group of the following formula (III) wherein R? is a hydrogen atom, a C1-6 alkyl group, a C3-8 cycloalkyl group, or a C6-14 aryl group; X is O, S, NH or NR? wherein R? is a C1-6 alkyl group, a C3-8 cycloalkyl group, a C6-14 aryl group; a is 0 or 1; M is a group of the following formula (IV) wherein Y is O, S, NH or NR?? wherein R?? is a C1-6 alkyl group, a C3-8 cycloalkyl group, a C6-14 aryl group; b is an integer of from O to 3; c is O or 1; d is an integer of from O to 3; prType: GrantFiled: August 6, 2009Date of Patent: February 9, 2016Assignee: DENTSPLY International Inc.Inventors: Joachim Klee, Uwe Lehmann, Anja Glaner
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Publication number: 20150335535Abstract: A one-part self-etching, self-priming dental adhesive having a pH of at most 2, which comprises an aqueous mixture containing (i) one or more polymerizable monomers optionally containing an acidic group, (ii) optionally one or more organic or inorganic acids, (iii) a polymerization initiator, and (iv) a thermal polymerisation inhibitor of the following formula (I): wherein R?1 represents a hydrogen atom, or a saturated hydrocarbon group having 1 to 18 carbon atoms. R?2, which may be the same or different if more than one R?2 is present, independently represent a saturated hydrocarbon group having 1 to 18 carbon atoms, and c represents an integer of from 1 to 4.Type: ApplicationFiled: December 23, 2014Publication date: November 26, 2015Inventors: Joachim E. KLEE, Uwe LEHMANN
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Patent number: 8870460Abstract: The invention relates to a plain bearing half liner for a crankshaft main bearing (24), with a slot (10) which extends in the circumferential direction over an angle of 90 to 170°, is closed at both circumferential ends of the plain bearing half liner and passes radially through the plain bearing half liner, and with an otherwise oil-groove-free sliding surface (11) on the inside of said plain bearing half liner.Type: GrantFiled: February 3, 2012Date of Patent: October 28, 2014Assignee: Federal-Mogul Wiesbaden GmbHInventors: Uwe Lehmann, Thomas Grooteboer
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Publication number: 20140003750Abstract: The invention relates to a plain bearing half liner for a crankshaft main bearing (24), with a slot (10) which extends in the circumferential direction over an angle of 90 to 170°, is closed at both circumferential ends of the plain bearing half liner and passes radially through the plain bearing half liner, and with an otherwise oil-groove-free sliding surface (11) on the inside of said plain bearing half liner.Type: ApplicationFiled: February 3, 2012Publication date: January 2, 2014Inventors: Uwe Lehmann, Thomas Grooteboer
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Patent number: 8546463Abstract: Dental composition comprising an aqueous mixture containing (i) a polymerizable acidic phosphoric acid ester monomer of the following formula (A): wherein a is an integer of from 1 to 10; R1 represents a hydrogen atom or a moiety of the following formula (Y) wherein X independently represent an oxygen atom, a sulfur atom, or a group NR, wherein R may be a hydrogen atom, a C1-6 alkyl group or an acyl group; L represents an (a+b)-valent organic residue containing 1 to 20 carbon atoms and optionally including ether, thioether or amino groups or further acidic groups, whereby the carbon atoms comprise at least a+b carbon atoms selected from primary and secondary aliphatic carbon atoms, secondary alicyclic carbon atoms, and aromatic carbon atoms, each of said a+b carbon atoms linking a phosphate or 2-(oxaallyl) derivative group; b is an integer of from 1 to 10; R2 which may be the same or different, independently may be hydrogen, an allyl group or a moiety R1 wherein b is 1; provided thatType: GrantFiled: April 13, 2009Date of Patent: October 1, 2013Assignee: DENTSPLY International Inc.Inventors: Joachim E. Klee, Uwe Lehmann
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Patent number: 8376618Abstract: A thrust washer (14) in the form of a semi-circular flanged ring includes at least two radially inward-directed outer connection pieces (22) on the inner edge of the thrust washer (14) for the connection with a radial bearing part (12), which are located in the circumferential direction on both sides of a contrived centerline (M) of the thrust washer (14) and in each case have an inner edge (23) facing the center line (M) and an outer edge (23a) turned away from the centerline (M). The invention also relates to a radio axial bearing with a radial bearing part and a thrust washer of such a type connected with the radial bearing part. The inner edges (23) in each case include an angle (?), which is 45° and 85°, with a tangent on the inner side connected in the center of the connection piece (22) at the semi-circle described by the thrust washer (14), in which the outer edge (23a) runs parallel to the respective inner edge (23).Type: GrantFiled: November 10, 2008Date of Patent: February 19, 2013Assignee: Federal-Mogul Wiesbaden GmbHInventors: Uwe Lehmann, Jurgen Klier, Thomas Grooteboer
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Patent number: 8372896Abstract: Dental adhesive composition having a pH of at least 5, which comprises an aqueous solution containing (a) a polymerizable N-substituted alkyl acrylic or acrylic acid amide monomer; (b) a water-soluble polymerizable carboxylic acid; and (c) a water-soluble organic solvent.Type: GrantFiled: January 13, 2009Date of Patent: February 12, 2013Assignee: DENTSPLY International Inc.Inventors: Joachim E. Klee, Uwe Lehmann, Franziska Heinzmann
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Patent number: 8241758Abstract: The invention relates to a plain bearing composite material with a supporting layer made of a copper alloy, and with a lining applied to the bearing metal layer. The copper alloy can contain 0.5-5% by weight of nickel, 0.2 to 2.5% by weight of silicon and=0.1% by weight of lead. The lining can be a sputtered layer that is applied without an intermediate layer. The invention also relates to methods for producing this composite material.Type: GrantFiled: May 13, 2006Date of Patent: August 14, 2012Assignee: Federal-Mogul Weisbaden GmbH & Co. KGInventors: Maik Wilhelm, Uwe Lehmann, Gerd Andler, Philippe Damour, Neil Graham
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Patent number: 8198388Abstract: One-part self-etching, self-priming dental adhesive composition having a pH of at most 2, which comprises (a) a polymerizable acidic phosphoric acid ester monomer (b) one or more polymerizable acidic monomers (c) a polymerizable N-substituted alkylacrylic or acrylic acid amide monomer; (d) optionally an organic and/or inorganic acid; (e) an organic water soluble solvent and/or water; and (f) polymerization initiator, inhibitor and stabilizer.Type: GrantFiled: December 15, 2004Date of Patent: June 12, 2012Assignee: Dentsply International Inc.Inventors: Joachim E. Klee, Uwe Lehmann, Uwe Walz
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Publication number: 20110306697Abstract: Non-aqueous dental adhesive comprising a mixture containing (i) one or more polymerizable monomers optionally containing an acidic group, (ii) a polymerization initiator, and (iii) a thermal polymerization inhibitor of the following formula (I) wherein R?1 represents a hydrogen atom, or a saturated hydrocarbon group having 1 to 18 carbon atoms. R?2, which may be the same or different if more than one R?2 is present, independently represent a saturated hydrocarbon group having 1 to 18 carbon atoms, and c represents an integer of from 1 to 4, and (iv) optionally an organic solvent.Type: ApplicationFiled: September 14, 2009Publication date: December 15, 2011Inventors: Joachim E. Klee, Uwe Lehmann
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Patent number: 7993758Abstract: The invention relates to a slide bearing composite material which comprises a support layer from a copper alloy and a bearing coating applied to said support layer. The copper alloy may comprise 0.5 to 5% by weight of nickel, 0.2 to 2.5% by weight of silicon, ?0.1% by weight of lead. The bearing coating can be a galvanic layer, a sputter layer or a plastic layer. The invention also relates to methods of producing such a composite material.Type: GrantFiled: May 13, 2006Date of Patent: August 9, 2011Assignee: Federal-Mogul Wiesbaden GmbH & Co. KGInventors: Maik Wilhelm, Uwe Lehmann, Gerd Andler, Philippe Damour, Neil Graham
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Patent number: 7959865Abstract: The invention relates to a miniaturized gas chromatograph and injector for the same. Said micro-GC is compact and simple and economical to construct. Dead volumes are largely avoided in order to achieve reliable and reproducible measured results. Said miniaturized gas chromatograph comprises at least one injector, one separation column and a detector which are combined on a circuit board to give a gas chromatography module. The injector comprises a first sheet with channels, which is provided with a second sheet with channels and which may be displaced relative to the latter, whereby at least one of the sheets is provided with a layer of plastic, in particular a chemically inert plastic on the side of the sheet facing the other side.Type: GrantFiled: January 14, 2004Date of Patent: June 14, 2011Assignee: SLS Micro Technology GmbHInventors: Tobias Schmidt, Mathias Mahnke, Uwe Lehmann
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Publication number: 20100323218Abstract: The invention relates to a plain bearing composite material with a supporting layer made of a copper alloy, and with a lining applied to the bearing metal layer. The copper alloy can contain 0.5 5% by weight of nickel, 0.2 to 2.5% by weight of silicon and =0.1% by weight of lead. The lining can be a sputtered layer that is applied without an intermediate layer. The invention also relates to methods for producing this composite material.Type: ApplicationFiled: May 13, 2006Publication date: December 23, 2010Inventors: Maik Wilhelm, Uwe Lehmann, Gerd Andler, Philippe Damour, Neil Graham
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Patent number: 7841225Abstract: The invention concerns a separation column in microsystem technology for a gas chromatograph comprising a first substrate, a second substrate which is arranged on the first substrate, wherein a trench structure is provided in at least one substrate and the trench structure is sealed off relative to the environment, a stationary phase applied at least to parts of the trench structure, a gas inlet connected to the trench structure, and a gas outlet connected to the trench structure.Type: GrantFiled: October 17, 2005Date of Patent: November 30, 2010Assignee: SLS Micro Technology GmbHInventor: Uwe Lehmann
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Publication number: 20100260449Abstract: A thrust washer (14) in the form of a semi-circular flanged ring includes at least two radially inward-directed outer connection pieces (22) on the inner edge of the thrust washer (14) for the connection with a radial bearing part (12), which are located in the circumferential direction on both sides of a contrived centerline (M) of the thrust washer (14) and in each case have an inner edge (23) facing the center line (M) and an outer edge (23a) turned away from the centerline (M). The invention also relates to a radio axial bearing with a radial bearing part and a thrust washer of such a type connected with the radial bearing part. The inner edges (23) in each case include an angle (?), which is 45° and 85°, with a tangent on the inner side connected in the center of the connection piece (22) at the semi-circle described by the thrust washer (14), in which the outer edge (23a) runs parallel to the respective inner edge (23).Type: ApplicationFiled: November 10, 2008Publication date: October 14, 2010Inventors: Uwe Lehmann, Jurgen Klier, Thomas Grooteboer
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Publication number: 20100179244Abstract: Dental adhesive composition having a pH of at least 5, which comprises an aqueous solution containing (a) a polymerizable N-substituted alkyl acrylic or acrylic acid amide monomer; (b) a water-soluble polymerizable carboxylic acid; and (c) a water-soluble organic solvent.Type: ApplicationFiled: January 13, 2009Publication date: July 15, 2010Inventors: Joachim E. Klee, Uwe Lehmann