Patents by Inventor Sigmund C. Catino, deceased

Sigmund C. Catino, deceased 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).

  • Stable, concentrated, aqueous compositions containing para-sulfophenyl-azo-substituted 1,4-phenylene-azo-para-2-hydroxypropoxyphenyl dyes
    Patent number: 4340385
    Abstract: Compounds of the formula ##STR1## wherein R.sub.1 is C.sub.1-4 alkyl,R.sub.2 is hydrogen, C.sub.1-4 alkyl or C.sub.1-4 alkoxy,R.sub.3 is hydrogen or C.sub.1-4 alkyl, andM is hydrogen or a monovalent non-chromophoric cation,and mixtures of such compounds, stable, concentrated, aqueous compositions consisting essentially of, by weight,5-20% Compound of said formula in salt form or a mixture thereof2-25% 2-(2-Methoxyethoxy)ethanol0-8% Propylene glycolBalance Water,and the use of such compounds, mixtures and stable, concentrated, aqueous compositions for dyeing and printing anionically dyeable substrates such as natural and synthetic polyamides, especially nylon carpet.
    Type: Grant
    Filed: February 23, 1981
    Date of Patent: July 20, 1982
    Assignee: Sandoz, Inc.
    Inventors: Silvio A. Rodriguez, Sigmund C. Catino, deceased