Patents by Inventor Pierre Le Tirant

Pierre Le Tirant 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).

  • Propping agent and method of propping open fractures in the walls of a bored well
    Patent number: 4072193
    Abstract: A propping agent for fractures produced in the walls of a bored well comprising a granular or particulate product containing on the basis of its oxide content up to 85% by weight zirconium oxide (ZrO.sub.2) in a quantity which is such that the weight ratio of ZrO.sub.2 /SiO.sub.2 is equal to or greater than 1.5, alumina (Al.sub.2 O.sub.3) in a quantity which is such that the weight ratio Al.sub.2 O.sub.3 /SiO.sub.2 is between 0 and 1.5 and sodium oxide (Na.sub.2 O) in a quantity which is such that the weight ratio Na.sub.2 O/SiO.sub.2 is between 0 and 0.04.
    Type: Grant
    Filed: March 19, 1976
    Date of Patent: February 7, 1978
    Assignees: Institut Francais du Petrole, Societe Europeene de Produits Refractaires
    Inventors: Jean-Paul Sarda, Pierre Le Tirant