Patents Examined by Dees, Carl F.
  • Conversion of cellulose into activated charcoal
    Patent number: 4425256
    Abstract: A process for converting wood stock or other cellulosic material into activated charcoal, use being made for this purpose of liquid anhydrous hydrogen chloride which converts the stock into a charcoal-like substance or charwood which is thereafter heated in a controlled atmosphere for a sufficient period to produce an activated charcoal.
    Type: Grant
    Filed: March 8, 1982
    Date of Patent: January 10, 1984
    Assignee: Marcoal Chemical Industries
    Inventor: Mark Pilipski