Patents by Inventor Olga Daskalakis

Olga Daskalakis 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).

  • Determination of urea
    Patent number: 4474888
    Abstract: A colorimetric urea determination method, reagent, and reagent kit useful in end point and kinetic urea determination is disclosed. Urea in a liquid sample reacts with o-phthalaldehyde and a chromogenic compound in the presence of a linear long hydrocarbon chain amidobetaine to produce an intensely colored reaction product, the concentration of which is linearly related to the urea concentration in the sample.
    Type: Grant
    Filed: October 28, 1982
    Date of Patent: October 2, 1984
    Assignee: Sherwood Medical Company
    Inventors: E. Melvin Gindler, Olga Daskalakis
  • Colorimetric urea determination in presence of long hydrocarbon chain amidobetaine
    Patent number: 4357144
    Abstract: A colorimetric urea determination method, reagent, and reagent kit useful in end point and kinetic urea determination. Urea in a liquid sample reacts with o-phthalaldehyde and chromotropic acid or one of its salts in the presence of a linear long hydrocarbon chain amidobetaine to produce an intensely colored reaction product, the concentration of which is linearly related to the urea concentration in the sample.
    Type: Grant
    Filed: August 14, 1981
    Date of Patent: November 2, 1982
    Assignee: Sherwood Medical Industries Inc.
    Inventors: E. Melvin Gindler, Olga Daskalakis