Patents Assigned to Rhone-Poulenc Recherches
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Patent number: 4900626Abstract: Selectively permeable, hollow composite fibers, well adapted for the dehumidification of air or carbon dioxide, are comprised of (a) an asymmetric, hollow, polymeric base fiber including both dense and porous component layers, and (b) a polymer layer coated onto the dense layer of said asymmetric hollow base fiber.Type: GrantFiled: July 28, 1987Date of Patent: February 13, 1990Assignee: Rhone-Poulenc RecherchesInventor: Albert Fabre
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Patent number: 4810384Abstract: Hydrophilic semipermeable membranes which retain their capacity for filtration, even after drying, and which are well adapted for either ultrafiltration or microfiltration, are comprised of at least 70% by weight of polyvinylidene fluoride (PVFD) and up to 30% by weight of a hydrophilic polymer compatible therewith, e.g., a cellulose acetate or sulfonated polysulfone.Type: GrantFiled: June 29, 1987Date of Patent: March 7, 1989Assignee: Rhone-Poulenc RecherchesInventor: Albert Fabre
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Patent number: 4805469Abstract: Apparatus for automatically taking and analyzing samples of substances made available in random manner, is of the type comprising an analysis assembly including at least two analysis stations having different characteristics, and a module delimiting temporary storage slots for receptacles containing different substances to be analyzed by different methods applicable to each of said substances, said apparatus comprising: receptacles each bearing a code identifying the substance contained therein, the analysis treatment to which is is to be subjected, and a treatment priority attributed thereto; means for detecting the in-use or available status of each analysis station; means for scanning the slots in the storage module for reading the codes of the receptacles and for storing them in priority order in conjuction with the characteristics of the corresponding treatment and the addresses of the slots; means for seeking in priority order correspondence between the treatments to be performed and a currently availabType: GrantFiled: June 17, 1987Date of Patent: February 21, 1989Assignee: Rhone-Poulenc RecherchesInventor: Roger Commarmot
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Patent number: 4785660Abstract: This invention relates to a process and installation for on-line analysis of a liquid product by liquid phase chromatography, the device for carrying out the process including a sampling and treatment probe disposed within the product and a chromatograph associated with the probe. An eluate detector disposed remote from the chromatograph and a monitoring unit takes into account the variations of appearance of a noteworthy peak with respect to the same peaks of an earlier chromatogram.Type: GrantFiled: March 10, 1987Date of Patent: November 22, 1988Assignee: Rhone-Poulenc RecherchesInventor: Claude Guillemin
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Patent number: 4756725Abstract: This invention relates to a trapping tube characterized in that it is constituted by a shaped tube comprising:a first section or zone of condensation of the separated gaseous phase delivered by the outlet of the chromatograph,a second section or zone of confinement of the condensate of the separated gaseous phase,and a third section or zone of evacuation of the vector gas of the separated gaseous phase. The invention is more particularly applicable to the obtaining of condensates in a small, even infinite quantity.Type: GrantFiled: August 27, 1986Date of Patent: July 12, 1988Assignee: Rhone-Poulenc RecherchesInventors: Jean-Paul Badey, Jean-Roger Desmurs, Michel Dumont
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Patent number: 4714653Abstract: Substrate composites, well adopted for the production of metallized printed circuits and facilely prepared by, e.g., papermaking procedures, include a central core layer comprising fibrous cellulosic material or flaked mica within a matrix of a thermosetting resin binder, said central core element having coextensively laminated to at least one of the face surfaces thereof, a lamina of a thermosetting resin comprising non-conductive metal oxide filler material distributed therethrough, and said metal oxide being borohydride reduceable and reactive to form unstable metal hydride intermediates.Type: GrantFiled: February 2, 1987Date of Patent: December 22, 1987Assignee: Rhone-Poulenc RecherchesInventor: Robert Cassat
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Patent number: 4709005Abstract: High molecular weight thermotropic aromatic polyesters having flow temperatures ranging from 200.degree. to 350.degree. C., and well adopted for molding into mechanically improved shaped articles, e.g., fibers and films, are comprised of recurring structural units of the formulae (I), (II), (III) and (IV), wherein (I) is the structural unit: ##STR1## in which R.sub.1 is methyl, ethyl, chlorine or bromine, said structural units (I) either being identical or different; (II) is the structural unit: ##STR2## (III) is the structural unit: ##STR3## (IV) is the structural unit: ##STR4## and further wherein the molar ratio of the structural units (I) relative to the total amount of the structural units (II)+(III) ranges from 0.95 to 1.Type: GrantFiled: January 13, 1986Date of Patent: November 24, 1987Assignee: Rhone-Poulenc RecherchesInventor: Jean-Pierre Quentin
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Patent number: 4698170Abstract: Disclosed is a process for preparing very highly alkaline, calcium-based, detergent-dispersant additives for lubricating oils and products produced by such a process. The process includes the steps of reacting an alkylbenzenesulfonic acid, an alkylphenol, diluent oil, halogen ions and lime, removing water formed during the reaction, sulfurizing the resultant product in the presence of glycol and at least one additional alcohol having a boiling point in excess of about 155.degree. C., carbonating the sulfurized product, removing the glycol and heavy alcohol from the sulfurized, carbonated reaction product, and filtering to remove sediment and to obtain a reaction product comprising a highly-alkaline, calcium-based detergent-dispersant additive for lubricating oils.Type: GrantFiled: July 9, 1984Date of Patent: October 6, 1987Assignee: Rhone-Poulenc RecherchesInventor: Jean-Louis Le Coent
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Patent number: 4675384Abstract: The plasma proteins contained in a plasma solution thereof are chromatographically fractioned, e.g., to obtain a high purity therapeutic grade albumin product, by successively contacting said plasma solution with at least one anion exchanger and at least one cation exchanger in fixed bed chromatography columns, the contact and exchange medium of chromatography therein also comprising a plurality of at least partially hydrophobic support particulates and a plurality of hydrophilic ion exchanger support particulates.Type: GrantFiled: April 2, 1984Date of Patent: June 23, 1987Assignees: Rhone-Poulenc Recherches, Institut MerieuxInventors: Adrien Dromard, Michel Exertier, Claude Rollin, Jean-Louis Tayot, Michel Tardy
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Patent number: 4668824Abstract: Essentially pure tri-(m-sulfophenyl)-phosphine, well suited as a ligand for the formation of, e.g., rhodium-based olefin hydroformylation catalysts, is facilely prepared by (i) sulfonating triphenylphosphine with oleum, H.sub.2 SO.sub.4 /SO.sub.3, wherein the temperature of sulfonation ranges from 15.degree. to about 25.degree. C., the molar ratio of SO.sub.3 /triphenylphosphine is at least 8, and the amount by weight of SO.sub.3 in the mixture (SO.sub.3 +H.sub.2 SO.sub.4 +triphenylphosphine) at the beginning of said sulfonation reaction is at least 33%; and (ii) thence terminating said sulfonation reaction via hydrolysis of the reaction mixture.Type: GrantFiled: July 30, 1984Date of Patent: May 26, 1987Assignee: Rhone-Poulenc RecherchesInventors: Jean Jenck, Didier Morel
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Patent number: 4665985Abstract: Porous, subterranean oil bearing formations penetrated by at least one wellbore are temporarily and reversibly plugged/sealed, by injecting therein a solution of an alkali metal silicate and a gelling agent therefor, permitting said alkali metal silicate and said gelling agent to harden into a relatively impermeable gel, maintaining said gel for period of plugging/sealing time desired, and thence disintegrating said relatively impermeable gel to substantially restore the initial porosity of said formation.Type: GrantFiled: February 19, 1985Date of Patent: May 19, 1987Assignee: Rhone-Poulenc RecherchesInventors: Gerard Berrod, Robert Maurer, Jean-Louis Brun, Philippe Bosc, Pierre Allemand
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Patent number: 4655898Abstract: Electrophoretic fractionation apparatus well adopted for separating solutions containing diverse substances dissolved therein, e.g.Type: GrantFiled: June 26, 1986Date of Patent: April 7, 1987Assignee: Rhone-Poulenc RecherchesInventors: Marie-Andree Poulhes, Jean-Pierre Lafaille, Jacques Pourrat, Victor Sanchez
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Patent number: 4636552Abstract: Novel silicone/polylactone graft copolymers, well suited as polymer composition additives, especially those destined for biomedical applications, have the average general formula: ##STR1## in which p is an integer or decimal ranging from 1.5 to 6, q is an integer or decimal ranging from 0 to 20, A is a divalent hydrocarbon having from 2 to 20 carbon atoms, n is an integer ranging from 3 to 12, m is an integer ranging from 2 to 25, the radicals R', which may be identical or different, are each hydrogen or C.sub.1 -C.sub.4 alkyl, and R is a hydrocarbon having up to 24 carbon atoms.Type: GrantFiled: May 30, 1985Date of Patent: January 13, 1987Assignee: Rhone-Poulenc RecherchesInventors: Michel Gay, Claude Millet
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Patent number: 4565606Abstract: Electrically insulating polyimide/aromatic polyamide film substrates are conductively metallized, e.g.Type: GrantFiled: April 16, 1984Date of Patent: January 21, 1986Assignee: Rhone-Poulenc RecherchesInventor: Robert Cassat
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Patent number: 4564424Abstract: Electrically insulating polymeric film substrates are conductively metallized, e.g.Type: GrantFiled: April 16, 1984Date of Patent: January 14, 1986Assignee: Rhone-Poulenc RecherchesInventors: Robert Cassat, Maurice Alliot-Lugaz