Patents by Inventor Detlef Mentzel

Detlef Mentzel 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).

  • Process for fireproofing cellulose-containing fiber material dyed with copper-complex azo dyes
    Patent number: 4237179
    Abstract: A process is provided for flameproofing cellulose containing fiber material which is dyed with copper-complex azo dyes. In this process the fiber material is heated with an aqueous composition containing(a) a dialkylated phosphono-propionic acid amide or its N-methylolated derivate(b) an alkanolamine such as a 2-amino-2-alkyl-1-alkanol(c) a water-soluble copper salt such as copper (II) chloride or sulphate(d) optionally an aminoplast precondensate or an etherified aminoplast pre-condensate such as methylolated or melamines or their alkyl ethers.The treated fiber material is dryed (e.g. up to 120.degree. C.) and then subjected to a heat treatment at e.g. 140.degree. to 200.degree. C.
    Type: Grant
    Filed: August 15, 1977
    Date of Patent: December 2, 1980
    Assignee: Ciba-Geigy Corporation
    Inventors: Detlef Mentzel, Hans-Rudolf Frei