Patents by Inventor Christian Birkmayer

Christian Birkmayer 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).

  • Functional vitamin D derivatives and method of determining 25-hydroxy- and 1?, 25-dihydroxy vitamin D
    Patent number: 8133694
    Abstract: The preparation of vitamin D compounds of formula (I) with a label attached to a spacer group in the 3 position is disclosed. In the above formula (I), O represents the oxygen atom of an ether group; Y represents hydrogen or hydroxy; A represents a label such as biotin, digoxigenin, or another vitamin D group; R represents a substituted hydrocarbon side-group of vitamin D or a vitamin D metabolite. Also disclosed is a method of measuring 25-hydroxy vitamin D metabolite and a 1?,25-dihydroxy vitamin D metabolite in a sample.
    Type: Grant
    Filed: March 3, 2004
    Date of Patent: March 13, 2012
    Assignees: Immundiagnostik AG, Biomedica GmbH
    Inventors: Franz Paul Armbruster, Wolfgang Voelter, Jens Tampe, Christian Birkmayer
  • Functional vitamin D derivatives and method of determining 25-hydroxy- and 1alpha, 25-dihydroxy vitamin D
    Publication number: 20050014211
    Abstract: The preparation of vitamin D compounds of formula (I) with a label attached to a spacer group in the 3 position is disclosed. In the above formula (I), O represents the oxygen atom of an ether group; Y represents hydrogen or hydroxy; A represents a label such as biotin, digoxigenin, or another vitamin D group; R represents a substitured hydrocarbon side-group of vitamin D or a vitamin D metabolite. Also disclosed is a method of measuring 25-hydroxy vitamin D metabolite and a 1?,25-dihydroxy vitamin D metabolite in a sample.
    Type: Application
    Filed: March 3, 2004
    Publication date: January 20, 2005
    Inventors: Franz Armbruster, Wolfgang Voelter, Jens Tampe, Christian Birkmayer
  • Functional vitamin D derivatives and a method for determining 25-hydroxy-vitamin D and 1&agr;, dihydroxy-vitamin D
    Patent number: 6787660
    Abstract: Vitamin D compounds of formula (I) with a label attached to a spacer group in the 3 position are disclosed. In the above formula (I), X is an optionally substituted hydrocarbon group with a length of 0.8-4.2 nm, optionally containing the heteroatoms S, O, N or P; Y is H or OH; A is a label capable of binding with high affinity to a protein; R is an optionally substituted hydrocarbon side chain of a D vitamin or a D vitamin metabolite. Also disclosed is the preparation of formula (I).
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: September 7, 2004
    Assignees: Immundiagnostik AG, Biomedica GmbH
    Inventors: Franz Paul Armbruster, Wolfgang Voelter, Jens Tampe, Christian Birkmayer