Patents Assigned to Mandoval Vermiculite (Proprietary) Limited
  • Vermiculite products produced by exfoliation pulverization and calcination
    Patent number: 3953357
    Abstract: A process for the preparation of vermiculite particles having enhanced properties which comprises exfoliating crude vermiculite without substantially changing its structural strength, pulverizing the exfoliated particles and subjecting them to a heat treatment so as to cause at least partial calcination.
    Type: Grant
    Filed: March 14, 1974
    Date of Patent: April 27, 1976
    Assignee: Mandoval Vermiculite (Proprietary) Limited
    Inventors: Ian Preston, John Charles Davidtz