Patents Represented by Attorney, Agent or Law Firm Katherine L. Carleton
-
Patent number: 8252219Abstract: Novel polymer shrink tubes, such as fluoropolymer shrink tubes and novel uses thereof. The polymer shrink tubes include at least one three-dimensional pattern formed along at least a portion of the inner surface of the tube. The polymer shrink tubes can be used for, for example, embossing a pattern into a polymer tube. Further use includes, for example, forming a catheter with at least one channel located in the catheter wall.Type: GrantFiled: April 15, 2010Date of Patent: August 28, 2012Assignee: W. L. Gore & Associates, Inc.Inventor: Benjamin M. Trapp
-
Patent number: 7927347Abstract: Methods and apparatus are provided for removing emboli during an angioplasty, stenting or surgical procedure comprising a catheter having an occlusion element, an aspiration lumen, and a blood outlet port in communication with the lumen, a guide wire having a balloon, a venous return sheath with a blood inlet port, and tubing that couples the blood outlet port to the blood inlet port. Apparatus is also provided for occluding the external carotid artery to prevent reversal of flow into the internal carotid artery. The pressure differential between the artery and the vein provides reverse flow through the artery, thereby flushing emboli. A blood filter may optionally be included in-line with the tubing to filter emboli from blood reperfused into the patient.Type: GrantFiled: June 20, 2005Date of Patent: April 19, 2011Assignee: Gore Enterprise Holdings, Inc.Inventors: Michael Hogendijk, Juan Carlos Parodi, Mark C. Bates
-
Patent number: 7736571Abstract: Novel polymer shrink tubes, such as fluoropolymer shrink tubes and novel uses thereof. The polymer shrink tubes include at least one three-dimensional pattern formed along at least a portion of the inner surface of the tube. The polymer shrink tubes can be used for, for example, embossing a pattern into a polymer tube. Further use includes, for example, forming a catheter with at least one channel located in the catheter wall.Type: GrantFiled: August 14, 2008Date of Patent: June 15, 2010Assignee: Gore Enterprise Holdings, Inc.Inventor: Benjamin M. Trapp
-
Patent number: 6245216Abstract: Process for the preparation of an aqueous tar suspoemulsion by mixing a mixture including (a) a viscous tar composition formed from a tar, from inorganic solids and, optionally, from water, (b) water (W), (c) a surface-active agent (SA) exhibiting an HLB of at least 10 and, optionally, (d) a thickening water-soluble polymer (TWP) with a molecular mass of greater than 10,000, the relative amounts of constituents (W), (SA) and, optionally, (TWP) being such that the viscosity of the (W)+(SA)+optional (TWP) mixture is preferably equal to or greater than the viscosity of the said tar, and then optional dilution of the mixture obtained with water or with an aqueous acidic solution. The process is particularly advantageous when applied to to the residues, containing sulphuric acid, resulting from the synthesis of white oils from petroleum fractions. The present invention further relates to a method for fluidizing acidic tars/sludges including contacting the tar/sludge with sulfuric acid and a surfactant.Type: GrantFiled: February 20, 1997Date of Patent: June 12, 2001Assignee: Rhodia Inc.Inventors: Philip Dean Hill, Thomas Edwin Pruitt, Forrest Lee Sanders, Gilles Guerin, Bruno Langlois
-
Patent number: 6197837Abstract: A process for the preparation of an aqueous tar suspoemulsion includes the steps of mixing a mixture including (a) a viscous tar composition formed from a tar, from inorganic solids and, optionally, from water; (b) water (W); (c) a surface-active agent (SA) exhibiting a hydrophilicity/lipophilicity balance (HLB) of at least 10; and, optionally, (d) a thickening water-soluble polymer (TWP) with a molecular mass of greater than 10,000. The relative amounts of constituents (W), (SA) and, optionally, (TWP) are such that the viscosity of the (W)+(SA)+optional (TWP) mixture is preferably equal to or greater than the viscosity of the tar. An optional embodiment of the process provides for dilution of the mixture obtained with water or with an aqueous acidic solution.Type: GrantFiled: March 5, 1999Date of Patent: March 6, 2001Assignee: Rhodia Inc.Inventors: Philip Dean Hill, Thomas Edwin Pruitt, Forrest Lee Sanders, Gilles Guerin, Bruno Langlois
-
Patent number: 6133194Abstract: The production of cerium oxides, zirconium oxides, (Ce,Zr)O.sub.2 mixed oxides and (Ce,Zr)O.sub.2 solid solutions having improved particle size distribution, surface area, oxygen storage capacity and pore volume by the addition of an additive, such as anionic surfactants, nonionic surfactants, polyethylene glycols, carboxylic acids, and carboxylate salts, during the formation of the oxides or precursors thereof.Type: GrantFiled: April 21, 1997Date of Patent: October 17, 2000Assignee: Rhodia Rare Earths Inc.Inventors: Jean-Pierre Cuif, Julie Lynn Shreeve Keyer, Steven Eric Deutsch
-
Patent number: 6111082Abstract: Stable Rare Earth carboxylate liquids having high concentrations of Rare Earths and suitable for use in forming active Ziegler Natta catalysts, are prepared with stabilizing agents such as water and/or acid. The liquids comprise from about 4.5% to about 20% Rare Earth element(s). A novel process for making is disclosed.Type: GrantFiled: April 17, 1998Date of Patent: August 29, 2000Assignee: Rhodia Rare Earths Inc.Inventors: Kenan Yunlu, Min He, Jean-Pierre Cuif, Michel Alas
-
Patent number: 6090926Abstract: Rare earth carboxylates in solid form are prepared or treated with a solubilizing agent to improve the solids solubility in aliphatic solvents. Other methods, such as treatment of the aliphatic solvent, to improve the solubility of solid rare earth carboxylates in aliphatic solvents are also described. Solubilizing agents identified for use include, but are not limited to, carboxylic acids, poly-acids, glycols, alcohols and mixtures thereof. These processes and treatments are particularly useful in regard to solid rare earth versatate, rare earth neodecanoate, rare earth octanoate, rare earth 2-ethyl hexanoate and rare earth naphthenate compositions.Type: GrantFiled: May 28, 1999Date of Patent: July 18, 2000Assignee: Rhodia Rare Earths Inc.Inventors: Julie Lynn Shreeve Keyer, Kenan Yunlu, Anne Nadine Forgeron, Jean-Pierre Cuif, Anne-Gaelle Morin
-
Patent number: 6054563Abstract: A process for producing solid, powdery carboxylates of Rare Earths (RE) elements, among them mainly Nd, La, Pr and Ce, where the ligands coordinated to the metal are long-chain, branched carboxylic acids is provided. Preferably, the carboxylic acids are selected from the group consisting of: 2-ethylhexanoic, neodecanoic, versatic and naphthenic acids.Type: GrantFiled: January 22, 1998Date of Patent: April 25, 2000Assignees: Rhodia Chimie, Rhodia Inc.Inventors: Michel Alas, Kenan Yunlu
-
Patent number: 6037305Abstract: The present invention relates to an improved active support, cerium/zirconium mixed oxides or cerium/zirconium solid solutions, for improved dehydrogenation catalysts useful in converting alkylaromatics to alkenylaromatics, e.g., ethylbenzene to styrene.Type: GrantFiled: March 3, 1997Date of Patent: March 14, 2000Assignees: Rhodia Chimie, Rhodia Inc.Inventors: Jean-Pierre Cuif, Anne-Marie Le Govic
-
Patent number: 5976476Abstract: The invention provides a catalytic composition which is based on a cerium oxide and on at least one other oxide chosen from iron, manganese and praseodymium oxides, which controls H.sub.2 S emissions in the catalysis of treatment of automobile exhaust gas.Type: GrantFiled: September 9, 1997Date of Patent: November 2, 1999Assignee: Rhodia ChimieInventors: Gilbert Blanchard, Eric Quemere, Olivier Touret, Valerie Visciglio
-
Patent number: 5961882Abstract: The invention relates to the use as a luminophor in plasma systems of a compound based on an yttrium, lanthanum, gadolinium or lutecium phosphate doped with at least one rare earth chosen from the group comprising terbium, praseodymium, europium and cerium.Type: GrantFiled: November 14, 1997Date of Patent: October 5, 1999Assignee: Rhone-Poulenc ChimieInventor: Denis Huguenin
-
Patent number: 5958127Abstract: The invention relates to a new process for the preparation of precipitated silica which has a good dispersibility and very satisfactory reinforcing properties. It also relates to new precipitated silicas which are in the form of powder, of substantially spherical beads or of granules, these silicas being characterized by the fact that they have a CTAB specific surface of between 90 and 250 m.sup.2 /g, a BET specific surface of between 90 and 250 m.sup.2 /g, a DOP oil uptake lower than 300 ml/100 g, a zinc content of between 1 and 5% by weight, and by the fact that the number N of stearic acid molecules consumed per nm.sup.2 of silica surface, when stearic acid is reacted with this silica in xylene for 2 hours at 120.degree. C., is at least 1. The invention also relates to the use of the said silicas as reinforcing fillers for elastomers, especially for improving their rheological properties.Type: GrantFiled: March 3, 1997Date of Patent: September 28, 1999Assignee: Rhone-Poulenc ChimieInventors: Yves Bomal, Yvonick Chevallier, Evelyne Prat
-
Patent number: 5916482Abstract: The invention relates to the use as a luminophor in plasma systems of a compound based on an yttrium, lanthanum, gadolinium or lutecium phosphate doped with at least one rare earth chosen from the group comprising terbium, praseodymium, europium and cerium.Type: GrantFiled: November 14, 1997Date of Patent: June 29, 1999Assignee: Rhone-Poulenc ChimieInventor: Denis Huguenin
-
Patent number: 5914040Abstract: The present invention relates to a process for the purification of a medium containing organic waste. The process according to the present invention is characterized in that the starting medium (or effluent) containing the organic waste is subjected to the following stages: (i) treatment with at least one oxidizing agent; (ii) treatment with at least one flocculating agent; (iii) treatment with at least one polyelectrolyte, and in that the effluent obtained on conclusion of all of these stages is subjected to a filtration stage (iv), whereby a filtration cake and a filtrate are obtained. The process according to the present invention is more particularly useful for the treatment of pig manure.Type: GrantFiled: October 14, 1997Date of Patent: June 22, 1999Assignee: Rhone-Poulenc ChimieInventors: Yvette Pescher, Jean-Paul Raes, Sylvain Danda, Bernard Castelas, Fran.cedilla.ois Rabatel, Jose Morales, Jean Bonfill
-
Patent number: 5897997Abstract: A reactor comprises a cylindrical body (1) with a lower cylindrical portion (5) and an upper cylindrical portion (6) of greater diameter than the lower portion, mutually connected by a connecting ring (7), a filtering ring (2) arranged in the lower part of the upper portion (6) and supported by the connecting ring (7), and an inner cylindrical member (3) having, at the lower end thereof, a flange (8) bearing on the filtering ring (7) and providing a gap (9) between the outer periphery of the flange (8) and the inner wall of the upper portion (6), wherein all the rotary elements are coaxially disposed.Type: GrantFiled: November 13, 1997Date of Patent: April 27, 1999Assignee: Rhone-Poulenc ChimieInventor: Luc Louvel
-
Patent number: 5858242Abstract: An agent for recovering heavy metal cations from an aqueous effluent, including a silicate or aluminosilicate type compound, e.g. an alkali metal silicate or aluminosilicate, and a carbonate type compound, e.g. an alkali metal carbonate, and preferably a carrier such as a lay. The agent may also form a cation stabilizer. Said agent is useful for removing or stabilizing heavy metal cations in the water used for cleaning flue gases from waste incineration, particularly household refuse and industrial waste incineration.Type: GrantFiled: May 20, 1997Date of Patent: January 12, 1999Assignee: Rhone-Poulenc ChimieInventors: Jean-Yves Chane-Ching, Yves Mottot
-
Patent number: 5856577Abstract: The instant invention relates to a process for the preparation of fluoroanilines of formula (I) wherein a fluorinated nitrated benzene compound of formula (II) is subjected to a catalytic hydrogenation in a liquid medium containing a catalyst, under hydrogen pressure, carrying out a catalytic reduction reaction and, optionally, a hydrogenolysis reaction, wherein the compound of formula (II) is introduced gradually into the said medium so that the content of compound of formula (II) in the liquid remains less than or equal to 1000 ppm by mass, in order selectively to form the compound of formula (I).Type: GrantFiled: May 28, 1997Date of Patent: January 5, 1999Assignee: Rhone-Poulenc ChimieInventors: Georges Cordier, Gilbert Guidot, Philippe Marion, Claude Mercier
-
Patent number: 5824797Abstract: Aerial spray or discharge drift is reduced, deposition improved and bioefficacy enhanced in aqueous compositions via the use of selected non-visco-elastic amounts of guar, one or more derivatives of guar or combinations thereof.Type: GrantFiled: June 26, 1995Date of Patent: October 20, 1998Assignee: Rhone-Poulenc Inc.Inventor: James Lyle Hazen
-
Patent number: 5817878Abstract: The present invention concerns a process for the acylation of an aromatic ether.Preferably, the invention relates to a process for the acylation of an unsubstituted aromatic ether, in particular anisole.The acylation process of the invention consists of reacting the ether with an acylation agent in the presence of a zeolitic catalyst, and is characterized in that the acylation reaction is carried out in the presence of an effective quantity of a catalyst comprising a beta zeolite with an atomic ratio denoted "global Si/Me.sup.1 " between the number of atoms of the element silicon and the number of atoms of every trivalent element Me.sup.1 contained in the zeolite of no less than 15, preferably in the range 15 to 55, and more preferably in the range 18 to 35.Type: GrantFiled: January 9, 1997Date of Patent: October 6, 1998Assignee: Rhone-Poulenc ChimieInventors: Michel Spagnol, Laurent Gilbert, Eric Benazzi, Christian Marcilly