Patents by Inventor Jean-Alex Laffitte

Jean-Alex Laffitte 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: 8425688
    Abstract: The present invention relates to the acidic cleaning in the beer industry, and more particularly an improved process for acidic cleaning of the various elements and vessels that are used in the preparation of beer and other related fermented beverages, said cleaning being carried out by using a formulation comprising at least one alkane sulphonic acid.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: April 23, 2013
    Assignee: Arkema France
    Inventors: Jean-Alex Laffitte, Bernard Monguillon, Pierre Stachura
  • Patent number: 8197605
    Abstract: The present invention relates to the use of at least one alkanesulfonic acid of formula R—SO3H, in which R represents a saturated, linear or branched, hydrocarbon chain containing 1 to 4 carbon atoms, as agent for cleaning cement, mortar, concrete, lime, laitance and other derived products. The invention also relates to a method of cleaning cement, mortar, concrete, lime, laitance and other derived products using at least one alkanesulfonic acid.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: June 12, 2012
    Assignee: Arkema France
    Inventors: Jean-Alex Laffitte, Bernard Monguillon
  • Publication number: 20110315168
    Abstract: The present invention relates to the field of cleaning in general, and in particular that of industrial cleaning and of domestic cleaning. More specifically, the invention aims to remove scale, oxalate scale, comprising salts of oxalic acid, and mainly mineral salts of oxalic acid, by means of a mixture of acids comprising at least one alkanesulphonic acid and at least one other mineral acid.
    Type: Application
    Filed: June 28, 2011
    Publication date: December 29, 2011
    Inventors: Jean-Alex Laffitte, Vijay R. Srinivas
  • Publication number: 20110214690
    Abstract: The present invention relates to the use of at least one alkane sulphonic acid, with formula R—SO3H, where R represents a saturated, linear or branched hydrocarbon chain, comprising 1 to 4 atoms of carbon for removing rust from all types of surface, in particular from metal surfaces, specifically iron, steel and others. The invention also relates to a method for cleaning rust from all types of surfaces using at least one alkane sulphonic acid.
    Type: Application
    Filed: November 27, 2009
    Publication date: September 8, 2011
    Applicant: ARKEMA FRANCE
    Inventors: Jean-Alex Laffitte, Bernard Monguillon
  • Publication number: 20100313908
    Abstract: The present invention relates to the use of at least one alkanesulfonic acid of formula R—SO3H, in which R represents a saturated, linear or branched, hydrocarbon chain containing 1 to 4 carbon atoms, as agent for cleaning cement, mortar, concrete, lime, laitance and other derived products. The invention also relates to a method of cleaning cement, mortar, concrete, lime, laitance and other derived products using at least one alkanesulfonic acid.
    Type: Application
    Filed: November 30, 2009
    Publication date: December 16, 2010
    Inventors: Jean-Alex Laffitte, Bernard Monguillon
  • Publication number: 20100229898
    Abstract: The invention relates to a method for cleaning surfaces of polyolefin-based materials soiled with food, particularly dairy products. More specifically, the invention relates to a method for cleaning materials based on one or more halogenated or non-halogenated polyolefins and soiled with food, particularly dairy products, which method is particularly safe for the environment, but also for the soiled polyolefin-based material with minimal wear and tear. According to the invention, the soiled material is brought into contact with an aqueous composition based on alkane sulfonic acids having between 1 and 4 carbon atoms.
    Type: Application
    Filed: May 19, 2008
    Publication date: September 16, 2010
    Applicant: ARKEMA FRANCE
    Inventors: Jean-Alex Laffitte, Bernard Monguillon
  • Publication number: 20090139546
    Abstract: The present invention relates to the acidic cleaning in the beer industry, and more particularly an improved process for acidic cleaning of the various elements and vessels that are used in the preparation of beer and other and other related fermented beverages, said cleaning being carried out by using a formulation comprising at least one alkane sulphonic acid.
    Type: Application
    Filed: November 14, 2008
    Publication date: June 4, 2009
    Applicant: Arkema France
    Inventors: Jean-Alex Laffitte, Bernard Monguillon, Pierre Stachura
  • Patent number: 5614641
    Abstract: The present invention concerns a process for enantioselective catalytic hydrogenation of the ketone C.dbd.O double bond to a secondary alcohol function, said process using a neutral ruthenium complex as the catalyst and a compound containing a C.dbd.O group as the substrate to be hydrogenated, characterised in that it comprises hydrogenation of the substrate using a diallyl (diphosphino) ruthenium compound with formula ##STR1## where al preferably represents CH.sub.2 CH.dbd.CH.sub.2 or CH.sub.2 C(CH.sub.3).dbd.CH.sub.2,Q represents a hydrocarbon bridge containing at least two catenary carbon atoms and which can contain one to four catenary heteroatoms selected from O, S, N and Si,R.sup.1 to R.sup.4 may be identical or different and each represents a C.sub.1 -C.sub.18 alkyl, C.sub.5 -C.sub.7 cycloalkyl or C.sub.6 -C.sub.12 aryl group.
    Type: Grant
    Filed: March 9, 1995
    Date of Patent: March 25, 1997
    Assignee: Elf Aquitaine
    Inventors: Jean-Pierre Genet, Sylvain Juge, Jean-Alex Laffitte, Catherine Pinel, Serge Mallart
  • Patent number: 5426201
    Abstract: A method of preparing manganous enolates by the treatment of alkali metal or alkaline earth metal enolates with manganous compounds in a solvent for the Mn enolate to be prepared.
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: June 20, 1995
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Gerard Cahiez, Patrick Clery, Jean-Alex Laffitte
  • Patent number: 5264602
    Abstract: This invention is concerned with new chiral diphosphinite-borane compound of the formula ##STR1## wherein R.sup.1 and R.sup.2, identical or different, represent each a C.sub.1 -C.sub.18 alkyl, C.sub.5 -C.sub.18 cycloalkyl, C.sub.7 -C.sub.18 aralkyl or C.sub.6 -C.sub.14 aryl group which can bear functional groups,R.sup.3 represents a C.sub.1 -C.sub.18 alkyl, C.sub.5 -C.sub.18 cycloalkyl, C.sub.7 -C.sub.18 aralkyl, C.sub.6 -C.sub.14 aryl, C.sub.1 -C.sub.18 alkoxy, C.sub.5 -C.sub.18 cycloalkyloxy, C.sub.7 -C.sub.18 aralkyloxy or C.sub.6 -C.sub.14 aryloxy group,Z represents a bridge linking the two phosphinite P atoms, said bridge being (i) a hydrocarbon chain having from 1 to 12 catenary C atoms or (ii) a heterohydrocarbon chain comprising from 1 to 12 catenary C atoms and at least one catenary heteroatom selected from the group consisting of O, S, Si, P and N.These chiral compounds are useful in the manufacture of chiral diphosphine compounds.
    Type: Grant
    Filed: January 9, 1992
    Date of Patent: November 23, 1993
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Sylvain Juge, Jean-Pierre Genet, Jean-Alex Laffitte, Massoud Stephan