Patents by Inventor Andre Lepain

Andre Lepain 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 for treating oil slicks
    Patent number: 4623468
    Abstract: A method for reducing oil slick on seawater comprising applying to the oil slick a dispersing compositions containing at least one surface-active agent, at least one solvent, and a nitrogen-containing compound which is a nutrient for the micro-organisms which are active in oil metabolism. The nitrogen-containing compound is a monoalkylguanidinium salt ##STR1## wherein R is an aliphatic hydrocarbon radical, saturated or unsaturated, containing from about 8 to about 20 carbon atoms, and X is a halogen or an acid anion.
    Type: Grant
    Filed: March 18, 1985
    Date of Patent: November 18, 1986
    Assignee: Labofina, S.A.
    Inventors: Andre Lepain, Robert D. E. M. Bronchart
  • Compositions and method for treating oil slicks
    Patent number: 4512914
    Abstract: Compositions for treating oil slicks on seawater said dispersing compositions containing at least one surface-active agent, at least one solvent, and a nitrogen-containing compound which is a nutrient for the micro-organisms which are active in oil metabolism. The nitrogen-containing compound is a monoalkylguanidinium salt ##STR1## wherein R is an aliphatic hydrocarbon radical, saturated or unsaturated, containing from about 8 to about 20 carbon atoms, and X is a halogen or an acid anion.
    Type: Grant
    Filed: February 3, 1983
    Date of Patent: April 23, 1985
    Assignee: Labofina, S.A.
    Inventors: Andre Lepain, Robert D. E. M. Bronchart
  • Surface-active compositions and method for dispersing oil slicks
    Patent number: 4469603
    Abstract: Surface active compositions for dispersing oil slicks consisting essentially of specified proportions of a fatty acid sorbitan monoester, a polyalkyleneoxide adduct of a fatty acid sorbitan monoester, an aqueous solution of a dialkylsulfosuccinate salt, a glycol monoether and water and a method for dispersing an oil slick on water comprising applying a surface active composition of the above-described type to the surface of the oil slick.
    Type: Grant
    Filed: August 6, 1982
    Date of Patent: September 4, 1984
    Assignee: Cosden Technology, Inc.
    Inventors: Andre Lepain, Alain G. R. Charlier
  • Oil slick dispersants using diguanidinium salt
    Patent number: 4462910
    Abstract: A process for disposing of oil slicks on seawater comprises treating the polluted seawater with a liquid dispersing composition and a nitrogen-containing nutrient for the seawater micro-organisms which are active in oil metabolization. The nutrient is a diguanidinium salt having the general formula:XH.H.sub.2 N--C(.dbd.NH)--NH--R--NH--C(.dbd.NH)--NH.sub.2 HXwherein R is preferably an alkyl radical containing from 2 to 12 carbon atoms and X is a halogen or an acid anion.
    Type: Grant
    Filed: February 3, 1983
    Date of Patent: July 31, 1984
    Assignee: Cosden Technology, Inc.
    Inventors: Andre Lepain, Robert D. E. M. Bronchart
  • System for the rapid analysis of water-borne oil spills
    Patent number: 4430888
    Abstract: A system is disclosed for rapid on-site analysis of a water-borne oil-slick, which system utilizes a combination of devices designed to permit on-site determination of the water content and specific gravity of the oil/water mixture, and the initial boiling point of the water-free oil.
    Type: Grant
    Filed: November 12, 1982
    Date of Patent: February 14, 1984
    Assignee: Labofina, S.A.
    Inventors: Andre Lepain, Robert Bronchart, Roger Remacle
  • Process and apparatus for the rapid determination of the characteristics of a petroleum pollutant
    Patent number: 4388407
    Abstract: Process and apparatus for on the site determination of the characteristics of an oil-pollutant containing water. The determinaton includes the use of a combination of devices designed to permit the on-site determination of the water content and specific gravity of the mixture of water and pollutant, and the initial boiling point of water-free pollutant.
    Type: Grant
    Filed: February 2, 1981
    Date of Patent: June 14, 1983
    Assignee: Labofina, S.A.
    Inventors: Andre Lepain, Robert Bronchart, Roger Remacle