Patents by Inventor Engin U. Akkaya

Engin U. Akkaya 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).

  • Long-wavelength fluorescent probe compounds for calcium ions and their use in ratiometrically measuring calcium ion concentrations
    Patent number: 5409835
    Abstract: Fluorescent, calcium-binding probe compounds having visible-light excitation and emission wavelengths, and a method of usage for these probe compounds in making wavelength-ratiometric or intensity-ratiometric measurements of calcium ion concentration in samples. The probe compounds generally relate to a heterocyclic part as bonded to a Ca.sup.2+ binding unit, namely, BAPTA, via an ethylenically unsaturated group; preferred examples of the heterocyclic group include benzothiazole, naphthothiazole, thiaflavin, indolenine, chloroindolenine, methoxybenzothiazole, and methoxyindolenine.
    Type: Grant
    Filed: December 30, 1992
    Date of Patent: April 25, 1995
    Assignee: The University of Maryland at Baltimore
    Inventors: Joseph R. Lakowicz, Engin U. Akkaya