Patents by Inventor Sylvia Baum

Sylvia Baum 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).

  • Indicators for determining the proton concentration of strongly alkaline aqueous solutions
    Patent number: 5747656
    Abstract: The invention relates to indicators for determine the proton concentration of strongly alkaline aqueous solutions which contain compounds of the formula (I) ##STR1## in which ##STR2##
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: May 5, 1998
    Assignee: Merck Patent Gesellschaft Mit Beshrankter Haftung
    Inventors: Wolfgang Fischer, Sylvia Baum, Thorsten Hartig, Michael Schleehahn