Patents by Inventor Claus R. Engel

Claus R. Engel 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).

  • Method for producing nitrocellulose-based carbon black concentrates in the form of chips
    Patent number: 4615852
    Abstract: The invention relates to a method for producing nitrocellulose-based carbon black in the form of chips. The recipe constituents are blended into a mixture and converted at an elevated temperature into a dispersion in a suitable device which achieves the desired degree of kneading such as a kneading machine or roller die extruder. The dispersion is then calendered into a film, the film is cooled and crushed into chips. The carbon black concentrates can be used as pigmentation agents for lacquers, paints and printing inks.
    Type: Grant
    Filed: February 6, 1984
    Date of Patent: October 7, 1986
    Assignee: Degussa Aktiengesellschaft
    Inventors: Claus R. Engel, Lutz Dworowy