Patents by Inventor Joachim Armster

Joachim Armster 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).

  • Black pigmented UV hardening printing ink
    Patent number: 4164423
    Abstract: There are prepared black pigment containing UV-drying printing inks in which there is employed for the black pigmentation a carbon black having the following physical and chemical properties:______________________________________ BET surface area m.sup.2 /g 20-50 Particle diameter nm 30-80 DBP adsorption ml/100g 30-100 Volatile constituents % 3-10 pH 3-6 ______________________________________The carbon black is produced by post oxidation of a coarse particled furnace black having the properties. ______________________________________ BET surface area m.sup.
    Type: Grant
    Filed: August 2, 1978
    Date of Patent: August 14, 1979
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Wilhelm Schumacher, Lothar Rothbuhr, Joachim Armster