Patents by Inventor Ewald Daltrozzo

Ewald Daltrozzo 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).

  • Fluorescence dyes and their use as fluorescence markers
    Patent number: 6552199
    Abstract: The subject matter of the invention are new xanthene derivatives of the formula I, wherein R1,R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, and X, Y, are as defined herein. The compounds according to the invention provide molecules that are—due to their spectral properties (absorption maxima in the range of approx. 650 nm and above as well as emission maxima above 670 nm)—very suitable for the use as dyes and in particular as fluorescence dyes. The compounds of the formula I according to the invention are used for the production of fluorescence conjugates, for their application in immunoassays, for DNA analytics, for in-vivo diagnostics or as a laser dye.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: April 22, 2003
    Assignee: Roche Diagnostics GmbH
    Inventors: Ewald Daltrozzo, Alexander Reiss
  • Methine dyes which have at least one heterocycle containing two nitrogen atoms and preparation thereof
    Patent number: 4960890
    Abstract: Methine dyes (I) which conform in one of their tautomeric forms to the general formula ##STR1## where Y.sup.1 is in both or either case an electron-attracting group and the other Y.sup.1 is hydrogen,Y.sup.2 is in each case, independently of the others, hydrogen, --CN, halogen, C.sub.1 -C.sub.6 -alkyl, C.sub.5 -C.sub.7 -cycloalkyl, phenyl, pyridyl or together with a further Y.sup.2 a five- or six-membered ring which may have a fused-on benzene ring,R is hydrogen, C.sub.1 -C.sub.20 -alkyl, C.sub.7 -C.sub.10 -aralkyl or .beta.
    Type: Grant
    Filed: October 5, 1989
    Date of Patent: October 2, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Ewald Daltrozzo, Werner Sulger
  • Methine dyes having a pyridyl group and a pyridyl or a quinolinyl group
    Patent number: 4876347
    Abstract: Methine dyes (I) which conform in one of their tautomeric forms to the general formula ##STR1## where Y.sup.1 is in both or either case an electron-attracting group and the other Y.sup.1 is hydrogen,Y.sup.2 is in each case, independently of the others, hydrogen, --CN, halogen, C.sub.1 -C.sub.6 -alkyl, C.sub.5 -C.sub.7 -cycloalkyl, phenyl, pyridyl or together with a further Y.sup.2 a five- or six-membered ring which may have a fused-on benzene ring,R is hydrogen, C.sub.1 -C.sub.20 -alkyl, C.sub.7 -C.sub.10 -aralkyl or .beta.
    Type: Grant
    Filed: March 24, 1988
    Date of Patent: October 24, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Ewald Daltrozzo, Werner Sulger
  • Methine dyes and preparation thereof
    Patent number: 4751309
    Abstract: Methine dyes (I) which conform in one of their tautomeric forms to the general formula ##STR1## where Y.sup.1 is in both or either case an electron-attracting group and the other Y.sup.1 is hydrogen,Y.sup.2 is in each case, independently of the others, hydrogen, --CN, halogen, C.sub.1 -C.sub.6 -alkyl, C.sub.5 -C.sub.7 -cycloalkyl, phenyl, pyridyl or together with a further Y.sup.2 a five- or six-membered ring which may have a fused-on benzene ring,R is hydrogen, C.sub.1 -C.sub.20 -alkyl, C.sub.7 -C.sub.10 -aralkyl or .beta.
    Type: Grant
    Filed: September 15, 1986
    Date of Patent: June 14, 1988
    Assignee: BASF Aktiengesellschaft
    Inventors: Ewald Daltrozzo, Werner Sulger