Patents Assigned to Elf Atochem
  • Patent number: 5962146
    Abstract: The invention relates to a material including:a polymer A including:1) at least one product chosen from polyamides, polyamide blends and copolymers which have polyamide blocks and polyether blocks,2) at least one product chosen from polyethylene, ethylene copolymers, polypropylene and propylene copolymers, these products being grafted with an unsaturated dicarboxylic acid or its anhydride,the polymer A adhering essentially without adhesive to a vulcanized EPDM or EPM rubber.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: October 5, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Isabelle Betremieux, Christian Dousson, Philippe Marcq
  • Patent number: 5957363
    Abstract: A surgical stapling instrument for stapling a tubular tissue structure having at least one distal end to a luminal structure, such as a vascular lumen or another tubular tissue structure. The instrument comprises a rod having a circumference sufficient to pass within the tubular tissue structure, an anvil mounted on the rod, and a generally tubular staple cartridge for containing a plurality of staples. The anvil has an array of staple deforming theron and is of a size sufficient to pass through a sugically formed opening in and to be accommodated within the luminal structure. The inner passage of the staple cartridge is sufficient to axially accommodate the tubular tissue structure between the rod and the inner surface of the staple cartridge, and sufficient to allow the staple cartridge to be moved axially along the rod.
    Type: Grant
    Filed: June 19, 1997
    Date of Patent: September 28, 1999
    Assignee: Elf Atochem S.A.
    Inventor: Christopher Francis Heck
  • Patent number: 5958438
    Abstract: The invention relates to a Bordeaux mixture in which virtually all of the copper is in the form of brochantite and which, in dry form, contains not more than 20% by weight of bassanite.The absence of cupric complexes other than brochantite and a small amount of bassanite in the dry product makes it possible to avoid the drawbacks of standard Bordeaux mixtures.
    Type: Grant
    Filed: October 3, 1996
    Date of Patent: September 28, 1999
    Assignee: Elf Atochem Agri S.A.
    Inventors: Michael Courtade, Georges Ramel
  • Patent number: 5958586
    Abstract: Improved monodisperse spheroidal particle latices of vinyl chloride polymers, e.g., having particle sizes ranging from 0.17 to 0.8 .mu.m or from 0.5 to 1.2 .mu.m, are produced by aqueous emulsion polymerization of vinyl chloride monomer, whether in a single stage or in two stages, in the absence of surface-active agent, in the presence of at least 0.2% by weight of at least one water-soluble alkali metal or ammonium persulfate initiator, and also in the presence of at least one water-soluble auxiliary compound that is a solvent for vinyl chloride, in such amount that the solubility of vinyl chloride in the aqueous phase at 25.degree. C. at atmospheric pressure is at least 1.5 g/l.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: September 28, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Jacques Grossoleil, Patrick Kappler, Nicolas Krantz
  • Patent number: 5959042
    Abstract: A material is provided comprising: (a) a polyamide; (b) a polymer having PA blocks and polyether PEG blocks; (c) optionally a polyolefin; (d) a functionalized polyolefin; the various constituents being present in amounts by weight, a, b, c and d such that: a>0; b>0; c+d>0; a+b+c+d=100; with a/b>0.2; (a+b)/(c+d)>1; and b/(a+b+c+d)<0.5. A film which is non-porous but breathable, i.e. porous to water vapor but not to water, and an antistatic object obtained from this material are also provided.
    Type: Grant
    Filed: November 14, 1997
    Date of Patent: September 28, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Alain Bouilloux, Patrick Alex
  • Patent number: 5958992
    Abstract: Foam blowing agents blends of 10-90% of n- and/or i-pentane with 90-10% of 142b or 124 are provided, as are polyol premixes and polyurethane foam compositions containing such blends.
    Type: Grant
    Filed: November 24, 1998
    Date of Patent: September 28, 1999
    Assignee: Elf Atochem North America, Inc.
    Inventors: Jinhuang Wu, Douglas R. Dillon, Richard M. Crooker
  • Patent number: 5959055
    Abstract: An ethylene/polyalkyleneglycol(ether) (meth)acrylic ester copolymer and a nonporous breathable film obtained therefrom are provided, the polymer comprising the following monomer units:(i) from 99 to 50% by weight ethylene;(ii) from 1 to 50% by weight of a monomer of formula ICH.sub.2 .dbd.C(R.sub.1)--COO--?C.sub.m H.sub.2m --O!.sub.n --H(I)in which R1 is H or CH.sub.3, m is 2, 3 or 4; n is comprised between 2 and 25; and(iii) from 0 to 20% by weight of a third monomer;said copolymer having a mean molecular weight comprised between 5,000 and 65,000.
    Type: Grant
    Filed: December 2, 1997
    Date of Patent: September 28, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Jean-Marc Le Blevec, Michel Degrand
  • Patent number: 5954886
    Abstract: The use of a mixture of cycloalkanes of general formula C.sub.n H.sub.2 (n+1-a) in which n is an integer ranging from 8 to 12 and a represents the number of rings as agent for cleaning and degreasing solid surfaces, e.g., printed circuits. The mixture has a flash point above 55.degree. C. (ASTM D56-70) and a distillation range of 175.degree. C. to 235.degree. C.
    Type: Grant
    Filed: February 10, 1998
    Date of Patent: September 21, 1999
    Assignee: ELF Atochem S.A.
    Inventors: Pascal Michaud, Jean-Jacques Martin
  • Patent number: 5951161
    Abstract: An apparatus for preparing a biofungicide mixture for application to harvested fruit. The apparatus includes a storage container for holding a dry biofungicide component. The storage container is attached to a conduit which has a screw conveyor rotatably disposed within it for transferring a desired amount of the dry biofungicide component to a preparation tank. A feed motor is attached to the conveyor and controls its rotation. An agitator mounted within the preparation tank mixes the biofungicide component with water to form a biofungicide mixture. A water level control device determines the level of the liquid within the tank. The water level control device controls flow of water into the preparation tank by actuating a valve along a water conduit. The water level control device also controls the startup of the feed motor. A transfer pump transfers biofungicide mixture from the preparation tank to an application tank.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: September 14, 1999
    Assignee: Elf Atochem North America, Inc.
    Inventor: Billy R. Blagg
  • Patent number: 5951830
    Abstract: To remove the olefinic impurities from a hydrochlorofluoroethane of formula: CF.sub.3 --CHClX (X=H, F, or Cl), it is subjected to a photochlorination stage.
    Type: Grant
    Filed: October 16, 1997
    Date of Patent: September 14, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Rene Bertocchio, Andre Lantz, Daniel Roland, Bertrand Collier
  • Patent number: 5948843
    Abstract: A lithographic printing ink contains an ester-modified carboxyl-containing copolymer as a pigment dispersant. The ester-modified carboxyl-containing copolymer is the reaction product of a long chain alcohol and a styrene maleic anhydride copolymer, wherein at least 35% of the carboxyl groups of the styrene maleic anhydride copolymer are esterified. The ink further includes a liquid carrier resin; a pigment; and a solvent selected from the group consisting of aliphatic hydrocarbons, aromatic hydrocarbons, and mixtures thereof and/or a modifying oil. The pigment dispersants improve color development when incorporated into the ink during the grinding stage.
    Type: Grant
    Filed: May 24, 1996
    Date of Patent: September 7, 1999
    Assignee: Elf Atochem North America, Inc.
    Inventors: Robert H. Boutier, Bruce K. McEuen, Michael F. Heilman
  • Patent number: 5948936
    Abstract: A method for the production of a sulfide group-containing thiol compound which comprises causing alkylene sulfide to react with a thiol compound in the presence of at least one basic catalyst selected from the group consisting of basic ion-exchange resins, quaternary ammonium compounds and alkyl pyridinium compounds, thereby inducing the ring-opening addition of the alkylene sulfide to the thiol compound. Further, a method for the production of a sulfide group-containing mercaptocarboxylic ester which comprises causing an alkylene sulfide to react with a mercaptocarboxylic ester.
    Type: Grant
    Filed: July 14, 1997
    Date of Patent: September 7, 1999
    Assignees: Nippon Shokubai Co. Ltd., Elf Atochem S.A.
    Inventors: Hirokazu Itoh, Kazuaki Abe, Takashi Tomita
  • Patent number: 5948920
    Abstract: Partially epoxidized compounds obtained from Diels Alder adducts of dicyclopentadiene with fatty oils having a iodine number of 70 or greater and their transesterification products with C.sub.1 to C.sub.10 alkanols are disclosed. 100% solids radiation and heat curable coating compositions containing the epoxidized compounds and/or their transesterification products are also disclosed.
    Type: Grant
    Filed: October 23, 1997
    Date of Patent: September 7, 1999
    Assignee: Elf Atochem North America, Inc.
    Inventors: Fred Budde, Mohammed R. Kazemizadeh, Walter P. Kosar, Jr.
  • Patent number: 5944879
    Abstract: This invention relates to aqueous solutions containing Ni cation and hypophosphite anion which have a Ni cation concentration greater than 36 grams/liter. Such solutions have utility in electroless nickel plating baths and processes as make-up solutions and replenishing solutions. The increased concentration of Ni cation results from the addition of the nickel salt of an alkyl sulfonic acid to the solution.
    Type: Grant
    Filed: January 6, 1998
    Date of Patent: August 31, 1999
    Assignee: Elf Atochem North America, Inc.
    Inventor: Nicholas M. Martyak
  • Patent number: 5945492
    Abstract: The present invention relates to a process for the preparation of graft thermoplastic polymers in which at least one thermoplastic polymer (A) is grafted with a functional monomer in the presence of a substance which inhibits or reduces the crosslinking or the depolymerization of (A).This substance may be a stable nitroxide radical.Graft polymers are useful as compatibilizing agents in mixtures of polymers and as coextrusion binders. The invention also relates to multilayer structures including these binders.
    Type: Grant
    Filed: October 15, 1997
    Date of Patent: August 31, 1999
    Assignee: Elf Atochem S.A.
    Inventor: Patrice Robert
  • Patent number: 5939183
    Abstract: The invention provides a plastic film possessing improved permeability to water vapor and high heat shielding property. Said plastic film is characterized by water vapor permeability of 100 to 25,000 g/m.sup.2 /24 hr, light transmittance of 20 to 95% and infrared transmittance of 5 to 90% and made of at least one material selected from a group comprising polyetherpolyamide block copolymer, thermoplastic polyester elastomer and thermoplastic polyurethane and containing flat inorganic particles coated with a substance having high refractive index.
    Type: Grant
    Filed: February 19, 1997
    Date of Patent: August 17, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Takatoshi Kuratsuji, Jerome Maillet, Jun Yamamoto
  • Patent number: 5939196
    Abstract: The invention provides a coating for a metal surface comprising (i) a primer able to gel and set, (ii) an adhesive and (iii) a thermoplastic polymer, in which said adhesive contains a catalyst, as well as metal objects, particularly pipes, provided with this surface coating, and a method for applying the surface coating.
    Type: Grant
    Filed: March 4, 1997
    Date of Patent: August 17, 1999
    Assignee: ELF Atochem S.A.
    Inventors: Patrice Perret, Regis Jacquemet, Lucien Murino
  • Patent number: 5935541
    Abstract: The process of the present invention consists in bringing into contact, on the one hand, (A) gaseous phosphorus pentafluoride or a gaseous mixture comprising phosphorus pentafluoride and hydrochloric acid, and, on the other hand, (B) a solution of lithium fluoride in hydrofluoric acid, in a column (10) having a sufficient number of transfer units to carry out the reaction of PF.sub.5 with LiF under the chosen conditions of temperature, of pressure and of molar ratio of the two contrasting reactants and with complete or substantially complete absorption of the PF.sub.5 in the column. This process makes it possible to solve the problems of blockage by preventing recrystallizations of salts; to discharge the heat given off by the reaction by the evaporation of a portion of the HF; and to separate the HCl which may be contained in the starting PF.sub.5, without loss of PF.sub.5, thus allowing subsequent recovery/value enhancement of this HCl.
    Type: Grant
    Filed: June 3, 1998
    Date of Patent: August 10, 1999
    Assignee: Elf Atochem, S.A.
    Inventors: Philippe Bonnet, Sylvain Perdrieux, Steven G. Schon
  • Patent number: 5936131
    Abstract: The present invention relates to a process for obtaining .beta.-hydroxy carbonyl compounds and/or .alpha.,.beta.-unsaturated carbonyl compounds, characterized in that at least one aldehyde or one ketone is brought into contact with a solid catalyst of general formula (I):?(Mg.sup.2+).sub.1-x (Al.sup.3+).sub.x (OH.sup.-).sub.2 !.sup.x+ ?(OH.sup.-).sub.x !.sup.x- (H.sub.2 O).sub.n (I)with 0.20.ltoreq.x.ltoreq.0.33 and n<1.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: August 10, 1999
    Assignee: ELF Atochem S,A
    Inventors: Remy Teissier, Maurice Fournier
  • Patent number: 5935666
    Abstract: A recipient is provided comprising an outer rigid housing and an inner flexible bag under butane gas pressure, in which the inner flexible bag is a material comprising a mixture of polyamide forming a matrix and of functionalized ethylene polymer comprising a functionalized ethylene/(meth)acrylate copolymer.
    Type: Grant
    Filed: April 22, 1997
    Date of Patent: August 10, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Marie-Pierre Corbic Bellinger, Alain Bouilloux, Dominique Basset