Patents by Inventor Michel Longuepee

Michel Longuepee 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).

  • Patent number: 4126469
    Abstract: Solution and procedure of depositing a coating on the surfaces of zinc-coated ferrous metal parts which protects against corrosion in the presence of water. The solution is made up by adding to water, perliter of final solution, of 1 to 40 grams of sodium metasilicate, 14 to 40 milliliters of phosphoric acid, specific gravity 1.71, from 1 to 40 grams of sodium nitrate, from 10 to 50 grams of anhydrous zinc chloride and the pH is adjusted to a value between 2.3 and 3.8. Preferably nickel chloride is added. For use, the solution is heated to a temperature ranging from 15.degree. to 75.degree. C and brought into contact with the parts to be treated for a period from 20 to 72 hours. The deposit is continuous, hard, resistant to shocks and abrasion and imparts an efficient and lasting protection to galvanized parts in corrosive waters. The invention is useful for the protection of piping in the building industry.
    Type: Grant
    Filed: December 23, 1977
    Date of Patent: November 21, 1978
    Assignee: International Lead Zinc Research Organization, Inc.
    Inventors: Michel Longuepee, Noel Dreulle
  • Patent number: 4110127
    Abstract: Solution and procedure of depositing a coating on the surfaces of zinc-coated ferrous metal parts which protects against corrosion in the presence of water. The solution is made up by adding to water, per liter of final solution, of 1 to 40 grams of sodium metasilicate, 14 to 40 milliliters of phosphoric acid, density 1.71 g/ml, from 1 to 40 grams of sodium nitrate, from 10 to 50 grams of anhydrous zinc chloride and the pH is adjusted to a value between 2.3 and 3.8. Preferably nickel chloride is added. For use, the solution is heated to a temperature ranging from 15.degree. to 75.degree. C and brought into contact with the parts to be treated for a period from 20 to 72 hours. The deposit is continuous, hard, resistant to shocks and abrasion and imparts an efficient and lasting protection to galvanized parts in corrosive waters. The invention is useful for the protection of piping in the building industry.
    Type: Grant
    Filed: June 21, 1976
    Date of Patent: August 29, 1978
    Assignee: International Lead Zinc Research Organization, Inc.
    Inventors: Michel Longuepee, Noel Dreulle
  • Patent number: 4110128
    Abstract: Solution and procedure for depositing a coating, comprising hydrated zinc pyrophosphate, on the surfaces of galvanized steel parts, to protect against corrosion in the presence of water. The aqueous solution contains, per liter of final solution, hexametaphosphate equivalent to 10 to 70 grams of sodium hexametaphosphate, metasilicate equivalent to 1 to 40 grams of sodium metasilicate, an amount of orthophosphoric acid equivalent to 15 to 40 milliliters of orthophosphoric acid having a density of 1.71 g/ml, zinc chloride in an amount equivalent to 10 to 50 grams of anhydrous zinc chloride, and calcium carbonate sufficient to bring the pH of the solution to between 2.0 and 3.0. Nickel, equivalent to 0.5 to 20 grams per liter of final solution of hexahydrated nickel chloride, and chlorate, equivalent to up to 20 grams of sodium chlorate per liter, may be added. The solution is used by contacting it with the parts to be treated for a time determined on the one hand by the solution temperature (between 10.degree.
    Type: Grant
    Filed: January 12, 1977
    Date of Patent: August 29, 1978
    Assignee: International Lead Zinc Research Organization, Inc.
    Inventors: Paule Dreulle, Michel Longuepee, Dominique Dhaussy