Patents by Inventor Ricardo Pasaran Sayago

Ricardo Pasaran Sayago 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).

  • Method of etching stone materials
    Patent number: 5393377
    Abstract: The present invention relates to an improved method of engraving stone which comprises the steps of; applying to a stone material an acid resistant polymer or lacquer coating upon portions of said stone material that are not to be engraved; bathing the coated stone material with a sufficient amount of acid for a sufficient period of time to engrave said stone material; washing the stone material with a sufficient amount of base to neutralize the acid; and, removing the coating to obtain an engraved stone material.In particular the present invention relates to methods of engraving marble or onyx using nitric acid, hydrochloric acid or hydrofluoric acids.
    Type: Grant
    Filed: February 3, 1994
    Date of Patent: February 28, 1995
    Inventors: Ricardo Pasaran Sayago, Benigno Pasaran Sayago