Patents by Inventor Sam Leslie Leach

Sam Leslie Leach 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).

  • Lightweight aggregate and composition and method of making same
    Patent number: 3973973
    Abstract: A composition of a silica-containing material and an additive of organic and inorganic materials which decomposes to generate gases at low temperatures is disclosed along with a method of making a lightweight aggregate from the composition.
    Type: Grant
    Filed: June 27, 1974
    Date of Patent: August 10, 1976
    Inventor: Sam Leslie Leach