Patents Assigned to Perlmooser Zementwerke A.G.
  • Cement, process and device for its production
    Patent number: 4083730
    Abstract: A cement and process of producing the cement is disclosed wherein the cement comprises at least two clinkers, one being a Portland cement clinker of conventional composition and at least one other clinker of low-calcium content or marl clinker. This marl clinker is heated between 450.degree. C and 1250.degree. C and contains hydratizable mineral phases of low-calcium content and 0-30% by weight related to the marl clinker of glass phases.
    Type: Grant
    Filed: July 20, 1976
    Date of Patent: April 11, 1978
    Assignee: Perlmooser Zementwerke A.G.
    Inventors: Ludwig Kwech, Fritz Jung