Patents by Inventor Leonard L. Pearson

Leonard L. Pearson 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).

  • Preservation of structures
    Patent number: 4500568
    Abstract: For use in strengthening of natural or artificial structures, e.g. buildings, monuments, ruins, there is drawn under vacuum into the structure a liquid of low viscosity and comprising a monomer or monomers containing some polymer which may be polymerized in situ. The polymer may be obtained by polymerization of part of the monomer or monomers. The liquid resin is cured at ambient temperature. Acrylates and methacrylates are preferred.
    Type: Grant
    Filed: December 7, 1981
    Date of Patent: February 19, 1985
    Assignee: Cole Polymers Limited
    Inventors: Leonard L. Pearson, John Litchfield
  • Soil consolidation method
    Patent number: 4072019
    Abstract: A soil consolidation composition and method of use involving an aqueous composition of an alkali metal silicate and a gelling agent, the composition having a viscosity sufficiently low (about 1 or 2 cps) so that it can penetrate to a pre-determined depth in a friable sandstone substrate to consolidate the substrate with the concentration of the silicate being sufficient to be gelled by the gelling agent after achievement of the penetration into the substrate.
    Type: Grant
    Filed: June 10, 1975
    Date of Patent: February 7, 1978
    Assignee: Fosroc International Limited
    Inventor: Leonard L. Pearson