Patents by Inventor Michael Riedling
Michael Riedling 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: 20120247150Abstract: This invention relates to magnetic particles having a glass surface which are substantially spherical. This invention also relates to methods for making them, as well as to suspensions thereof and their uses for the purification of DNA or RNA in particular in automated processes.Type: ApplicationFiled: February 13, 2012Publication date: October 4, 2012Applicant: Roche Diagnostics GmbHInventors: Kurt Weindel, Michael Riedling, Albert Geiger
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Patent number: 8129118Abstract: This invention relates to magnetic particles having a glass surface which are substantially spherical. This invention also relates to methods for making them, as well as to suspensions thereof and their uses for the purification of DNA or RNA in particular in automated processes.Type: GrantFiled: May 11, 2005Date of Patent: March 6, 2012Assignee: Roche Diagnostics GmbHInventors: Kurt Weindel, Michael Riedling, Albert Geiger
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Publication number: 20120022246Abstract: Magnetic particles with an outer glass surface being essentially poreless or having pores of a diameter of less then 10 nm as well as ferromagnetic particles with a glass surface are preferentially useful for the isolation of biological material from samples. They provide a quick and reliable purification.Type: ApplicationFiled: October 7, 2011Publication date: January 26, 2012Applicant: ROCHE MOLECULAR SYSTEMS, INC.Inventors: Jorg Kleiber, Thomas Walter, Herbert Harttig, Christoph Lesniak, Martin Mennig, Michael Riedling, Helmut Schmidt
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Publication number: 20110117561Abstract: Magnetic particles with an outer glass surface being essentially poreless or having pores of a diameter of less then 10 nm as well as ferromagnetic particles with a glass surface are preferentially useful for the isolation of biological material from samples. They provide a quick and reliable purification.Type: ApplicationFiled: November 30, 2010Publication date: May 19, 2011Applicant: ROCHE DIAGNOSTICS GMBHInventors: Jörg Kleiber, Thomas Walter, Herbert Harttig, Christoph Lesniak, Martin Mennig, Michael Riedling, Helmut Schmidt
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Patent number: 7371830Abstract: Magnetic particles are prepared containing a magnetic core coated with a glass layer having a substantially pore-free glass surface or having pores with a diameter of less than 10 nm. The particles are used for separating biological material such as nucleic acids. A preferred process of preparing the particles is by forming a mixture of magnetic cores with a sol formed from an alcohol and a metal alkoxide, spray-drying the mixture to coat the cores with a layer of gelled sol, and heating the coated cores to obtain the magnetic glass particles. Preferably, the particles have an average particle size of less than 100 ?m. The magnetic core may be a composite material containing a mica core and magnetite particles immobilized on the mica core, and the glass layer may contain boron oxide. Magnetic core materials include magnetite (Fe3O4) and Fe2O3.Type: GrantFiled: January 24, 2005Date of Patent: May 13, 2008Assignee: Roche Diagnostics GmbHInventors: Jörg Kleiber, Thomas Walter, Herbert Harttig, Christop Lesniak, Martin Mennig, Michael Riedling, Helmut Schmidt
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Publication number: 20070082360Abstract: Magnetic particles with an outer glass surface being essentially poreless or having pores of a diameter of less then 10 nm as well as ferromagnetic particles with a glass surface are preferentially useful for the isolation of biological material from samples. They provide a quick and reliable purification.Type: ApplicationFiled: December 12, 2006Publication date: April 12, 2007Inventors: Jorg Kleiber, Thomas Walter, Herbert Harttig, Christoph Lesniak, Martin Mennig, Michael Riedling, Helmut Schmidt
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Publication number: 20050266462Abstract: This invention relates to magnetic particles having a glass surface which are substantially spherical. This invention also relates to methods for making them, as well as to suspensions thereof and their uses for the purification of DNA or RNA in particular in automated processes.Type: ApplicationFiled: May 11, 2005Publication date: December 1, 2005Inventors: Kurt Weindel, Michael Riedling, Albert Geiger
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Publication number: 20050266429Abstract: Magnetic particles with an outer glass surface being essentially poreless or having pores of a diameter of less then 10 nm as well as ferromagnetic particles with a glass surface are preferentially useful for the isolation of biological material from samples. They provide a quick and reliable purification.Type: ApplicationFiled: January 24, 2005Publication date: December 1, 2005Inventors: Jorg Kleiber, Thomas Walter, Herbert Harttig, Christoph Lesniak, Martin Mennig, Michael Riedling, Helmut Schmidt
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Patent number: 6919444Abstract: Preparations of particles having a glass surface, wherein more than 75% by weight of these particles have a particle size between 0.5 ?m and 15 ?m and a glass surface which contains between 2 and 6 mole % zinc oxide, have proven to be particularly advantageous in processes for the purification of nucleic acids. This in particular results in an increased nucleic acid yield.Type: GrantFiled: February 20, 2003Date of Patent: July 19, 2005Assignee: Roche Diagnostics GmbHInventors: Herbert Harttig, Michael Riedling, Martin Mennig, Helmut Schmidt
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Patent number: 6870047Abstract: Magnetic particles are prepared containing a magnetic core coated with a glass layer having a substantially pore-free class surface or having pores with a diameter offices than 10 nm. The particles are used for separating biological material such as nucleic acids. A preferred process of preparing the particles is by forming a mixture of magnetic cores with a sol formed from an alcohol and a metal alkoxide, spray-drying the mixture to coat the cores with a layer of gelled sol, and heating the coated cores to obtain the magnetic glass particles. Preferably, the particles have an average particle size of less than 100 ?m. The magnetic core may be a composite material containing a mica core and magnetite particles immobilized on the mica core, and the glass layer may contain boron oxide. Magnetic core materials include magnetite (Fe3O4) and Fe2O3.Type: GrantFiled: January 10, 2001Date of Patent: March 22, 2005Assignee: Roche Diagnostics GmbHInventors: Jörg Kleiber, Thomas Walter, Herbert Harttig, Christoph Lesniak, Martin Mennig, Michael Riedling, Helmut Schmidt
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Publication number: 20030224366Abstract: This invention relates to magnetic particles having a glass surface which are substantially spherical. This invention also relates to methods for making them, as well as to suspensions thereof and their uses for the purification of DNA or RNA in particular in automated processes.Type: ApplicationFiled: May 16, 2002Publication date: December 4, 2003Inventors: Kurt Weindel, Michael Riedling, Albert Geiger
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Publication number: 20030135038Abstract: Magnetic particles with an outer glass surface being essentially poreless or having pores of a diameter of less then 10 nm as well as ferromagnetic particles with a glass surface are preferentially useful for the isolation of biological material from samples. They provide a quick and reliable purification.Type: ApplicationFiled: July 23, 2002Publication date: July 17, 2003Applicant: Roche Diagnostics GmbH.Inventors: Jorg Kleiber, Thomas Walter, Herbert Harttig, Christoph Lensniak, Martin Mennig, Michael Riedling, Helmut Schmidt
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Publication number: 20030125542Abstract: Preparations of particles having a glass surface, wherein more than 75% by weight of these particles have a particle size between 0.5 &mgr;m and 15 &mgr;m and a glass surface which contains between 2 and 6 mole % zinc oxide, have proven to be particularly advantageous in processes for the purification of nucleic acids. This in particular results in an increased nucleic acid yield.Type: ApplicationFiled: February 20, 2003Publication date: July 3, 2003Applicant: Roche Molecular Systems, Inc.Inventors: Herbert Harttig, Michael Riedling, Martin Mennig, Helmut Schmidt
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Patent number: 6545143Abstract: Preparations of particles having a glass surface, wherein more than 75% by weight of these particles have a particle size between 0.5 &mgr;m and 15 &mgr;m and a glass surface which contains between 2 and 6 mole % zinc oxide, have proven to be particularly advantageous in processes for the purification of nucleic acids. This in particular results in an increased nucleic acid yield.Type: GrantFiled: January 9, 2002Date of Patent: April 8, 2003Assignee: Roche Diagnostics, GmbHInventors: Herbert Harttig, Michael Riedling, Martin Mennig, Helmut Schmidt
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Publication number: 20020137920Abstract: Magnetic particles with an outer glass surface being essentially poreless or having pores of a diameter of less then 10 nm as well as ferromagnetic particles with a glass surface are preferentially useful for the isolation of biological material from samples. They provide a quick and reliable purification.Type: ApplicationFiled: January 10, 2001Publication date: September 26, 2002Applicant: Boehringer Mannheim GmbH.Inventors: Jorg Kleiber, Thomas Walter, Herbert Harttig, Christoph Lesniak, Martin Mennig, Michael Riedling, Helmut Schmidt
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Patent number: 6255477Abstract: Magnetic glass particles are prepared containing a magnetic core coated with a glass layer having a substantially pore-free glass surface. The particles are used for separating biological material such as nucleic acids. A preferred process of preparing the particles is by forming a mixture of magnetic cores with a sol formed from an alcohol and a metal alkoxide, spray-drying the mixture to coat the cores with a layer of gelled sol, and heating the coated cores to obtain the magnetic glass particles. Preferably, the particles have an average particle size of less than 100 &mgr;m and any pores of the glass surface have a diameter of less than 10 nm. The magnetic core may be a composite material containing a mica core and magnetite particles immobilized on the mica core, and the glass layer may contain boron oxide. Magnetic core materials include magnetite (Fe3O4) and Fe2O3.Type: GrantFiled: March 11, 1998Date of Patent: July 3, 2001Assignee: Roche Diagnostics GmbHInventors: Jörg Kleiber, Thomas Walter, Herbert Harttig, Christoph Lesniak, Martin Mennig, Michael Riedling, Helmut Schmidt