Patents by Inventor Ralf Kruger
Ralf Kruger 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: 7764375Abstract: The present invention relates to an imaging device (1) for imaging microscopic or macroscopic objects (5). The imaging device (1) comprises a light source (2), an illumination beam path (6), an imaging beam path (7) and an imaging optical means (4), in particular in the form of an objective. The illumination beam path (6) extends from the light source (2) to the object (5). The imaging beam path (7) extends from the object (5) to a detector or a tube (3). At least one polarization means (9) is provided in the illumination beam path (6), which polarization means (9) can be used to convert the light of the light source to a prescribable polarization state. An analyzer means (10) is provided in the imaging beam path (7), with the analyzer means (10) and the polarization means (9) being able to be adjusted in relation to one another in such a manner that the light entering the imaging beam path (7) cannot pass through the analyzer means (10).Type: GrantFiled: April 10, 2007Date of Patent: July 27, 2010Assignee: Leica Microsystems CMS GmbHInventor: Ralf Krüger
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Patent number: 7626706Abstract: The present invention relates to a polarization interference microscope (1) for imaging objects (5). The polarization interference microscope (1) comprises a light source (2), an illumination beam path (6), an imaging beam path (7) and an objective (4). The illumination beam path (6) extends from the light source (2) to the object (5). The imaging beam path (7) extends from the object (5) to a detector or a tube (3). At least one polarization means (9) is provided in the illumination beam path (6) and/or in the imaging beam path (7), by which at least one polarization means the light of the respective beam path (6, 7) can be converted into a predeterminable polarization state. An analyzer means (10) is provided in the imaging beam path (7). A birefringent component is provided between the polarization means (9) and the analyzer means (10), by which birefringent component the light polarized by the polarization means (9) can be divided into two partial beams (13, 14) having different polarization directions.Type: GrantFiled: April 10, 2007Date of Patent: December 1, 2009Assignee: Leica Microsystems CMS GmbHInventors: Ralf Krüger, Christian Schulz
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Publication number: 20070247635Abstract: The present invention relates to a polarization interference microscope (1) for imaging objects (5). The polarization interference microscope (1) comprises a light source (2), an illumination beam path (6), an imaging beam path (7) and an objective (4). The illumination beam path (6) extends from the light source (2) to the object (5). The imaging beam path (7) extends from the object (5) to a detector or a tube (3). At least one polarization means (9) is provided in the illumination beam path (6) and/or in the imaging beam path (7), by which at least one polarization means the light of the respective beam path (6, 7) can be converted into a predeterminable polarization state. An analyzer means (10) is provided in the imaging beam path (7). A birefringent component is provided between the polarization means (9) and the analyzer means (10), by which birefringent component the light polarized by the polarization means (9) can be divided into two partial beams (13, 14) having different polarization directions.Type: ApplicationFiled: April 10, 2007Publication date: October 25, 2007Inventors: Ralf Kruger, Christian Schulz
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Publication number: 20070236788Abstract: The present invention relates to an imaging device (1) for imaging microscopic or macroscopic objects (5). The imaging device (1) comprises a light source (2), an illumination beam path (6), an imaging beam path (7) and an imaging optical means (4), in particular in the form of an objective. The illumination beam path (6) extends from the light source (2) to the object (5). The imaging beam path (7) extends from the object (5) to a detector or a tube (3). At least one polarization means (9) is provided in the illumination beam path (6), which polarization means (9) can be used to convert the light of the light source to a prescribable polarization state. An analyzer means (10) is provided in the imaging beam path (7), with the analyzer means (10) and the polarization means (9) being able to be adjusted in relation to one another in such a manner that the light entering the imaging beam path (7) cannot pass through the analyzer means (10).Type: ApplicationFiled: April 10, 2007Publication date: October 11, 2007Inventor: Ralf Kruger
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Patent number: 6989926Abstract: The present invention concerns a microscope and an illumination device for a microscope that ensure optimal illumination in the standard (10×–100×), scanning (1.6×–5×), and macro (1×–1.6×) ranges. The illumination system comprises only one condenser head that can be switched in or out and that can optimally illuminate the entire range from 1× to 100×, and a movably arranged focusing lens that ensures optimal adaptation of the illumination to the entrance pupil for all ranges.Type: GrantFiled: November 26, 2003Date of Patent: January 24, 2006Assignee: Leica Microsystems Wetzlar GmbHInventors: Ralf Krüger, Peter Euteneuer
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Publication number: 20060012861Abstract: An inverted microscope (1) equipped with an ergotube (9) is disclosed. The ergotube (9) substantially comprises an eyepiece (9a) and a tube housing (9b). The microscope beam path (30) defined by the inverted microscope (1) is of U-shaped configuration. The U-shaped microscope beam path (30) is deflected into the eyepiece (9a) by a single deflection element (74) that is embodied as a pivotable mirror.Type: ApplicationFiled: July 14, 2005Publication date: January 19, 2006Applicant: Leica Microsystems CMS GmbHInventors: Peter Euteneuer, Ralf Kruger
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Publication number: 20040105148Abstract: The present invention concerns a microscope and an illumination device for a microscope that ensure optimal illumination in the standard (10×-100×), scanning (1.6×-5×), and macro (1×-1.6×) ranges. The illumination system comprises only one condenser head that can be switched in or out and that can optimally illuminate the entire range from 1× to 100×, and a movably arranged focusing lens that ensures optimal adaptation of the illumination to the entrance pupil for all ranges.Type: ApplicationFiled: November 26, 2003Publication date: June 3, 2004Applicant: LEICA MICROSYSTEMS WETZLAR GmbHInventors: Ralf Kruger, Peter Euteneuer
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Patent number: 6346587Abstract: The present invention relates to a process for the production of partially fluorinated fluoropolymers, in accordance with which fluoromonomers are free-radically polymerized in the presence of polyfluoropropanes or polyfluorobutanes of the formulae CF3—CH2—CF2H, CF3—CHF—CF2—H, CF3—CH2—CF3, CHF2—CF2—CH2F, CF3—CH2—CF2—CH3 AND CF3—CHF—CF2—CH3 and optionally a chain-transfer agent.Type: GrantFiled: September 18, 2000Date of Patent: February 12, 2002Assignee: Bayer AktiengesellschaftInventors: Ralf Krüger, Gerhard Heilig, Claus Dieter Sommerfeld
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Patent number: 6211314Abstract: The present invention therefore provides a vulcanizable mixture comprising a low-viscosity fluorinated rubbers, in which at least one fluorine monomer is polymerized by free radicals in the presence of one or more compounds of the formula (I) or (II) wherein R1 represents a fluorine atom or a perfluoroalkyl radical having 1 to 4 carbon atoms and R2 represents a perfluoroalkyl radical having 1 to 4 carbon atoms and n=4 or 5, and, optionally, a molecular weight regulator.Type: GrantFiled: June 4, 1999Date of Patent: April 3, 2001Assignee: Bayer AktiengesellschaftInventors: Ralf Krüger, Wilhelm-Franz Biener
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Patent number: 5969064Abstract: The present invention therefore provides a new process for the preparation of low-viscosity fluorinated rubbers, in which at least one fluorine monomer is polymerized by free radicals in the presence of one or more compounds of the formula (I) or (II) ##STR1## wherein R.sup.1 represents a fluorine atom or a perfluoroalkyl radical having 1 to 4 carbon atoms and R.sup.2 represents a perfluoroalkyl radical having 1 to 4 carbon atoms and n=4 or 5, and, optionally, a molecular weight regulator.Type: GrantFiled: September 15, 1998Date of Patent: October 19, 1999Assignee: Bayer AktiengesellschaftInventors: Ralf Kruger, Wilhelm-Franz Biener
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Patent number: 5852125Abstract: The present invention relates to a new fluororubber, a process for its production and its use, as well as a process for producing fluororubber mouldings and/or coatings.Type: GrantFiled: May 30, 1997Date of Patent: December 22, 1998Assignee: Bayer AktiengesellschaftInventors: Ralf Kruger, Jurgen Ackermann, Dieter Wrobel, Helmut Steinberger
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Patent number: 5698635Abstract: A reactive and processable fluoropolymer, obtainable by mechanical shearing ofa fluoropolymer A) comprising polymerized monomer units of at least one fluorinated, optionally substituted, alkene with 2 to 8 carbon atoms andoptionally at least one member selected from the group consisting of a perfluorinated vinyl ether, non-fluorinated olefin and non-fluorinated vinyl ester, and0.3 to 7% of a compound B) which possessesa double bond (I) capable of adding to polymeric radical fragments anda II-electron system which is either conjugated with double bond (I) or has readily transferrable hydrogen atoms in the allyl or benzyl position andoptionally further double bonds or reactive groups andoptionally further auxiliary agents (C).The fluoropolymer is especially useful in radical addition or nucleophilic or electrophilic substitution or addition, e.g. cross-linking or grafting.Type: GrantFiled: November 2, 1995Date of Patent: December 16, 1997Assignee: Bayer AktiengesellschaftInventors: Ralf Kruger, David Harrison, Dieter Wrobel
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Patent number: 5696216Abstract: The present invention relates to peroxide crosslinkable fluororubbers prepared from polymerized units of vinylidene fluoride, at least one fluorinated propene and/or a fluorinated methyl vinyl ether, at least one perfluoro(polyoxaalkyl vinyl ether), optionally tetrafluoroethylene and crosslinking-active reactive sites, to a process for the production thereof and to the use thereof.Type: GrantFiled: November 12, 1996Date of Patent: December 9, 1997Assignee: Bayer AktiengesellschaftInventors: Ralf Kruger, Govert Woeste, Tatyana Alexandrovna Filchakova, Alexandr Nikolaevich Kollar, Sergey Vasilyevich Sokolov, Mark Peysakhovich Greenblat, Nikolay Vladimirovich Veretennikov
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Patent number: 5654373Abstract: Peroxide curable fluororubbers, which contain no cure-site units in addition to the fluoromonomers forming the polymer chain, and a process for their production.Type: GrantFiled: April 18, 1995Date of Patent: August 5, 1997Assignee: Bayer AktiengesellschaftInventors: Ralf Kruger, David Harrison, Dieter Wrobel
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Patent number: 5648566Abstract: Monomers of the formula (I) (for example, 3,3,4,4,5,5,6,6-octafluoromethylenecyclopentane) are described, as well as copolymers prepared from them and from one or more monomers copolymerizable with them. ##STR1## wherein n=3 to 5 The compounds are suitable for the production of a multiplicity of thermoplastically processable copolymers having various sets of properties which permit applications both as compact moulded parts and as coatings.Type: GrantFiled: May 31, 1995Date of Patent: July 15, 1997Assignee: Bayer AktiengesellschaftInventors: Ralf Kruger, Michael Negele, Norbert Lui, Albrecht Marhold
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Patent number: 5447994Abstract: Thermoplastic fluoroelastomer graft polymers formed from a fluorine-containing graft polymer formed from a rubber like (Tg<0.degree. C.), uncrosslinked fluorine-containing copolymer containing double bonds as the graft base onto which is grafted a fluorine-containing monomer that gives an at least partly crystalline polymer are produced from the rubber-like uncrosslinked copolymer by radical polymerization in solution, suspension or emulsion under elevated pressure at about -15.degree. to +120.degree. C., and grafting thereon a monomer which forms an at least partly crystalline polymer the grafting onto the rubber-like copolymer taking place by radical solution, suspension or emulsion graft polymerization under elevated pressure at about -15.degree. to +120.degree. C.Type: GrantFiled: September 2, 1994Date of Patent: September 5, 1995Assignee: Bayer AktiengesellschaftInventors: Ralf Kruger, David B. Harrison, Leo Morbitzer
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Patent number: 5426165Abstract: The present invention relates to fluoropolymers with improved temperature resistance and dimensional stability in the heat based on fluoroethylenes, using perfluoro-(cycloalkyl-vinyl ethers) and optionally other monomers as comonomers. The invention also relates to the perfluor-(cycloalkyl-vinyl ethers) which impart the advantageous thermal properties to the fluoropolymers according to the invention.Type: GrantFiled: May 12, 1994Date of Patent: June 20, 1995Assignee: Bayer AktiengesellschaftInventors: Ralf Kruger, Karl-Erwin Piejko, Michael Negele, Ulrich Eisele, Albrecht Marhold
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Patent number: 5399645Abstract: A 2-allyl-perfluoroalkyl-trifluorovinyl ether of the formula ##STR1## wherein R.sup.1.sub.F and R.sup.2.sub.F represent either --CF.sub.3 or, together, (CF.sub.2).sub.n where n=2 or 3,is produced bya) reacting hexafluoropropene oxide with a 2-allyl-substituted perfluorocycloketone or perfluoroketone,b) subjecting the resulting 2-(allylperfluorocycloalkoxy)- or 2-(allylperfluyoro-alkoxy)-perfluoropropanoic acid fluoride to alkaline saponification thereby to form the corresponding sodium salt,c) and decarboxylating the sodium salt at about 150.degree.-350.degree. C.Polymers thereof produce amorphous, transparent coatings or molded items with glass transition temperatures between 60.degree. and 150.degree. C. and have good solubility characteristics in a number of organic solvents.Type: GrantFiled: May 20, 1994Date of Patent: March 21, 1995Assignee: BAYER AktiengesellschaftInventors: Ralf Kruger, Michael Negele, Albrecht Marhold
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Patent number: 5385981Abstract: Thermoplastic fluoroelastomer graft polymers formed from a fluorine-containing graft polymer formed from a rubber like (Tg<0.degree. C.), uncrosslinked fluorine-containing copolymer containing double bonds as the graft base onto which is grafted a fluorine-containing monomer that gives an at least partly crystalline polymer are produced from the rubber-like uncrosslinked copolymer by radical polymerization in solution, suspension or emulsion under elevated pressure at about -15.degree. to +120.degree. C., and grafting thereon a monomer which forms an at least partly crystalline polymer the grafting onto the rubber-like copolymer taking place by radical solution, suspension or emulsion graft polymerization under elevated pressure at about -15.degree. to +120.degree. C.Type: GrantFiled: July 20, 1993Date of Patent: January 31, 1995Assignee: Bayer AktiengesellschaftInventors: Ralf Kruger, David B. Harrison, Leo Morbitzer
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Patent number: 5313003Abstract: A 2-allyl-perfluoroalkyl-trifluorovinyl ether of the formula ##STR1## wherein R.sup.1.sub.F and R.sup.2.sub.F represent either --CF.sub.3 or, together, (CF.sub.2).sub.n where n=2 or 3.Type: GrantFiled: June 10, 1993Date of Patent: May 17, 1994Assignee: Bayer AktiengesellschaftInventors: Ralf Kruger, Michael Negele, Albrecht Marhold