Patents by Inventor Rolf Urtel

Rolf Urtel 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).

  • Azo dyes
    Patent number: 4116953
    Abstract: Compounds of the formula ##STR1## in which K is the radical of a coupling component;X is hydrogen, chloro, bromo, methyl or nitro; andY is hydrogen, chloro, bromo or methyl.The compounds are eminently suitable as pigments for coloring printing inks, surface coatings and resins with exceptional fastness properties.
    Type: Grant
    Filed: September 16, 1976
    Date of Patent: September 26, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Peter Dimroth, Helmut Junge, Peter Tonne, Rolf Urtel
  • Azo pigments derived from 2-hydroxy-3-carboxynaphthalene containing a substituted or unsubstituted phthalimide
    Patent number: 3953420
    Abstract: Azo pigments derived from 2-hydroxy-3-carboxy-naphthalene and containing a substituted or unsubstituted phthalimide radical. The majority give red colorations and due to their excellent fastness properties are particularly valuable for use in surface coatings and resins.
    Type: Grant
    Filed: January 26, 1973
    Date of Patent: April 27, 1976
    Assignee: Badische Anilin- & Soda-Fabrik Aktiengesellschaft
    Inventors: Peter Dimroth, Frank Dost, Rolf Urtel