Patents by Inventor Lema Tadesse

Lema Tadesse 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).

  • Patent number: 7322927
    Abstract: Water soluble hybrid phthalocyanine derivatives useful in competitive and noncompetitive assays immunoassays, nucleic acid and assays are disclosed and claimed having (1) at least one donor subunit with a desired excitation peak, and (2) at least one acceptor subunit with a desired emission peak, wherein said derivative(s) is/are capable of intramolecular energy transfer from said donor subunit to said acceptor subunit. Such derivatives also may contain an electron transfer subunit. Axial ligands may be covalently bound to the metals contained in the water soluble hybrid phthalocyanine derivatives. Ligands, ligand analogues, polypeptides, proteins and nucleic acids can be linked to the axial ligands of the dyes to form dye conjugates useful in immunoassays and nucleic acid assays.
    Type: Grant
    Filed: June 6, 2006
    Date of Patent: January 29, 2008
    Assignee: Biosite, Inc.
    Inventors: Kenneth F. Buechler, Joseph B. Noar, Lema Tadesse
  • Publication number: 20060228748
    Abstract: Water soluble hybrid phthalocyanine derivatives useful in competitive and noncompetitive assays immunoassays, nucleic acid and assays are disclosed and claimed having (1) at least one donor subunit with a desired excitation peak, and (2) at least one acceptor subunit with a desired emission peak, wherein said derivative(s) is/are capable of intramolecular energy transfer from said donor subunit to said acceptor subunit. Such derivatives also may contain an electron transfer subunit. Axial ligands may be covalently bound to the metals contained in the water soluble hybrid phthalocyanine derivatives. Ligands, ligand analogues, polypeptides, proteins and nucleic acids can be linked to the axial ligands of the dyes to form dye conjugates useful in immunoassays and nucleic acid assays.
    Type: Application
    Filed: June 6, 2006
    Publication date: October 12, 2006
    Inventors: Kenneth Buechler, Joseph Noar, Lema Tadesse
  • Patent number: 7083984
    Abstract: Water soluble hybrid phthalocyanine derivatives useful in competitive and noncompetitive assays immunoassays, nucleic acid and assays are disclosed and claimed having (1) at least one donor subunit with a desired excitation peak; and (2) at least one acceptor subunit with a desired emission peak, wherein said derivative(s) is/are capable of intramolecular energy transfer from said donor subunit to said acceptor subunit. Such derivatives also may contain an electron transfer subunit. Axial ligands may be covalently bound to the metals contained in the water soluble hybrid phthalocyanine derivatives. Ligands, ligand analogues, polypeptides, proteins and nucleic acids can be linked to the axial ligands of the dyes to form dye conjugates useful in immunoassays and nucleic acid assays.
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: August 1, 2006
    Assignee: Biosite, Inc.
    Inventors: Kenneth F. Buechler, Joseph B. Noar, Lema Tadesse
  • Patent number: 6964844
    Abstract: Water soluble hybrid phthalocyanine derivatives useful in competitive and noncompetitive assays immunoassays, nucleic acid and assays are disclosed and claimed having (1) at least one donor subunit with a desired excitation peak; and (2) at least one acceptor subunit with a desired emission peak, wherein said derivative(s) is/are capable of intramolecular energy transfer from said donor subunit to said acceptor subunit. Such derivatives also may contain an electron transfer subunit. Axial ligands may be covalently bound to the metals contained in the water soluble hybrid phthalocyanine derivatives. Ligands, ligand analogues, polypeptides, proteins and nucleic acids can be linked to the axial ligands of the dyes to form dye conjugates useful in immunoassays and nucleic acid assays.
    Type: Grant
    Filed: April 24, 1998
    Date of Patent: November 15, 2005
    Assignee: Biosite, Inc.
    Inventors: Kenneth F. Buechler, Joseph B. Noar, Lema Tadesse
  • Publication number: 20020061602
    Abstract: Water soluble hybrid phthalocyanine derivatives useful in competitive and noncompetitive assays immunoassays, nucleic acid and assays are disclosed and claimed having (1) at least one donor subunit with a desired excitation peak; and (2) at least one acceptor subunit with a desired emission peak, wherein said derivative(s) is/are capable of intramolecular energy transfer from said donor subunit to said acceptor subunit. Such derivatives also may contain an electron transfer subunit. Axial ligands may be covalently bound to the metals contained in the water soluble hybrid phthalocyanine derivatives. Ligands, ligand analogues, polypeptides, proteins and nucleic acids can be linked to the axial ligands of the dyes to form dye conjugates useful in immunoassays and nucleic acid assays.
    Type: Application
    Filed: February 1, 2001
    Publication date: May 23, 2002
    Inventors: Kenneth F. Buechler, Joseph B. Noar, Lema Tadesse
  • Patent number: 6251687
    Abstract: The invention describes the particles comprising an energy donor as a first component and a fluorescent dye as a second component positioned in said particles at an energy exchanging distance from one another, wherein the two components have a Stokes shift of greater than or equal to 50 nm, said particle having bound on its surface, a protein, polypeptide, nucleic acid, nucleotide or protein containing ligand analogue are disclosed and claimed. In addition, novel fluorescent dyes are described which exhibit intramolecular energy transfer for use to label various molecules, proteins, polypeptides, nucleotides and nucleic acids or to incorporate into particles.
    Type: Grant
    Filed: March 23, 1995
    Date of Patent: June 26, 2001
    Assignee: Biosite Diagnostics, Inc.
    Inventors: Kenneth F. Buechler, Joseph Barry Noar, Lema Tadesse
  • Patent number: 6238931
    Abstract: Particles and methods for the detection or visualization of analytes using fluorescence energy transfer. Particles comprising an energy donor as a first component and a fluorescent dye as a second component positioned in said particles at an energy exchanging distance from one another, wherein the two components have a Stokes shift of greater than or equal to 50 nm, said particle having bound on its surface, a protein, polypeptide, nucleic acid, nucleotide or protein containing ligand analogue are disclosed and claimed.
    Type: Grant
    Filed: July 12, 1994
    Date of Patent: May 29, 2001
    Assignee: Biosite Diagnostics, Inc.
    Inventors: Kenneth F. Buechler, Joseph Barry Noar, Lema Tadesse
  • Patent number: 5824799
    Abstract: Water soluble hybrid phthalocyanine derivatives useful in competitive and noncompetitive assays immunoassays, nucleic acid and assays are disclosed and claimed having (1) at least one donor subunit with a desired excitation peak; and (2) at least one acceptor subunit with a desired emission peak, wherein said derivative(s) is/are capable of intramolecular energy transfer from said donor subunit to said acceptor subunit. Such derivatives also may contain an electron transfer subunit. Axial ligands may be covalently bound to the metals contained in the water soluble hybrid phthalocyanine derivatives. Ligands, ligand analogs, polypeptides, proteins and nucleic acids can be linked to the axial ligands of the dyes to form dye conjugates useful in immunoassays and nucleic acid assays.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: October 20, 1998
    Assignee: Biosite Diagnostics Incorporated
    Inventors: Kenneth F. Buechler, Joseph B. Noar, Lema Tadesse
  • Patent number: 5763189
    Abstract: Particles comprising an energy donor as a first component and a fluorescent dye as a second component positioned in said particles at an energy exchanging distance from one another, wherein the two components have a Stokes shift of greater than or equal to 50 nm, said particle having bound on its surface, a protein, polypeptide, nucleic acid, nucleotide or protein containing ligand analogue are disclosed and claimed. In addition, novel fluorescent dyes are described which exhibit intramolecular energy transfer for use to label various molecules, proteins, polypeptides, nucleotides and nucleic acids or to incorporate into particles.
    Type: Grant
    Filed: September 23, 1994
    Date of Patent: June 9, 1998
    Assignee: Biosite Diagnostics Incorporated
    Inventors: Kenneth F. Buechler, J. Barry Noar, Lema Tadesse