Patents Assigned to Pharo Limited
  • Clay type liquid-resistant protective layer
    Patent number: 5620778
    Abstract: A liquid-resistant protective layer which at least consists of a material layer containing clay, has, adjacent at least one edge of the layer, at least one groove or slit which extends into the material layer containing the clay to enable sealed joints to be formed between contiguous protective layers.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: April 15, 1997
    Assignee: Pharo Limited
    Inventor: John Clatworthy
  • Method of manufacturing liquid-repellant covering layer
    Patent number: 5476625
    Abstract: Liquid-repellant covering layer, characterized in that it consists of at least a compact layer (2) which is formed by a mass of fibers (3) and a clay product (4).
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: December 19, 1995
    Assignee: Pharo Limited
    Inventor: John L. Clatworthy