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| Number | Title | Issue Date |
| 5555936 | Scleroglucan gel applied to the oil industry The permeability of a subterranean reservoir can be more easily controlled by first injecting a crosslinking agent solution and then subsequently injecting a scleroglucan solution to thereby form, in situ, crosslinked scleroglucan gel. This reverse order ... | 09/17/1996 |
| 5536651 | Mutant strain of Xanthomonas campestris, process of obtaining xanthan, and non-viscous xanthan The present invention relates to a mutant strain of Xanthomonas campestris; a method of preparing xanthan by fermentation of said strain; and a non-viscous xanthan capable of being obtained by said method.... | 07/16/1996 |
| 5534239 | Process for the synthesis of a silica enriched crystalline aluminosilicate having the offretite structure, the aluminosilicate obtained and its use as a catalyst for the conversion of hydrocarbons Process for the synthesis of a silica-enriched crystalline aluminosilicate having the offretite structure from a nucleation gel A containing sources of silicon, aluminium, alkali metal ions, an organic structuring agent and water and a growth gel B contai... | 07/09/1996 |
| 5525587 | Application of muds containing scleroglucan to drilling large diameter wells The present inventors found that the addition of scleroglucan, in particular of unrefined scleroglucan, to the water employed as drilling fluid for drilling wells requiring a high flow rate made it possible to limit formation leaching and improved the rem... | 06/11/1996 |
| 5507897 | Process for the preparation of a target component for cathode sputtering A target element is formed by creating a precursor system which may yield an inorganic material at a temperature of 300-1600 C. which is lower than the melting point of said material. The precursor system contains an inorganic additive having a melting po... | 04/16/1996 |
| 5477001 | Recombinant DNA coding for a novel protein having ଲ-1,3-glucanase activity, bacteria containing this DNA, transformed plant cells and plants The invention provides a protein, isolated from soybean, having ଲ-1,3-glucanase activity and comprising the amino acid sequence of SEQ ID No: 1. DNA constructs encoding said protein, and transformed plants expressing the protein, are also provided.... | 12/19/1995 |
| 5451391 | Process for the synthesis of a crystalline aluminosilicate enriched in silica, having the structure of mazzite, the aluminosilicate obtained and its use as catalyst for the conversion of hycrocarbons Process for the preparation of a crystalline aluminosilicate enriched in silica, having the structure of mazzite, by hydrothermal crystallization of a gel containing sources of silicon, aluminum and alkali metal ions, in the presence of an organic structu... | 09/19/1995 |
| 5447709 | Process for the synthesis of zeolites belonging to the faujasite structural family Process for the synthesis of faujasite, having a Si/Al ratio greater than 1 and which can exceed 3, in the presence of a structuring agent consisting of at least one carbonaceous macrocycle having 10 to 24 atoms per ring and containing heteroatoms chosen ... | 09/05/1995 |
| 5446138 | Recombinant DNA coding for a protein with endochitinase activity Recombinant DNA which codes for a protein with endochitinase activity or for a precursor thereof, comprising the sequence (a1) (SEQ ID NO. 1).... | 08/29/1995 |
| 5434285 | Chiral phosphinite-boranes and their preparation and use The present invention relates, by way of novel industrial products, to the phosphinite-borane compounds of the general formula ##STR1## in which R1 and R2, which are identical or different, are each a C1 -C18 | 07/18/1995 |
| 5426201 | Preparation of manganous enolates and its applications 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.... | 06/20/1995 |
| 5401644 | Process of producing conventional or non-viscous xanthan by action of xanthomonas campestrisCNCM 1-956 The present invention relates to a mutant strain of Xanthomonas campestris; a method of preparing xanthan by fermentation of said strain; and a non-viscous xanthan capable of being obtained by said method.... | 03/28/1995 |
| 5395646 | Process for the protection of solid surfaces, particularly coastal areas, against pollution by hydrocarbons A process affording protection to solid surfaces and especially coastal areas against hydrocarbon pollution involves applying a protective layer composed of polysaccharides containing pendant carboxyl groups, such as alginates or lightly methylated pectin... | 03/07/1995 |
| 5393511 | Synthesis of zeolites of faujasite structure A process is provided for the preparation of zeolites belonging to the faujasite structural class and exhibiting a Si:Al ratio higher than 1 in which a reaction mixture is first produced, which has a pH higher than 10 and contains water, a source of tetra... | 02/28/1995 |
| 5385717 | Process for the synthesis of zeolites having an aluminosilicate framework belonging to the faujasite structural family, products obtained and their use in adsorption and catalysis An aluminosilicate gel containing a structuring agent ST and having a composition appropriate for crystallizing as a zeolite of the faujasite structural family is prepared and then subjected to a crystallization to form a zeolite precursor consisting of t... | 01/31/1995 |
| 5370858 | Process for the synthesis of zeolites having an aluminosilicate framework belonging to the faujasite structural family, products obtained and their use in adsorption and catalysis An aluminosilicate gel containing a structuring agent ST and having a composition appropriate for crystallizing as a zeolite of the faujasite structural family is prepared, and then subjected to a crystallization to form a zeolite precursor consisting of ... | 12/06/1994 |
| 5330015 | Application of scleroglucan muds to drilling deviated wells A method for drilling deviated or horizontal wells is facilitated by the use of a scleroglucan-containing aqueous drilling mud. The use of such drilling muds is environmentally and economically advantageous over the use of oil-based drilling muds and is s... | 07/19/1994 |
| 5323857 | Process for enhancing oil recovery using scleroglucan powders The present invention is directed to a process for improving the dispersibility and the filterability of scleroglucan powders, in which a surfactant is incorporated in the coagulated polymer. The powder obtained according to the process has a dispersibili... | 06/28/1994 |
| 5314674 | Process for the synthesis of a zeolite of MTT type, products obtained and their application in adsorption and catalysts Process for the synthesis of a zeolite of MTT type in the absence of any nitrogenous organic agent, from a reaction mixture containing water, a source of tetravalent silicon and ethanol and optionally a source of trivalent aluminium and a source of hydrox... | 05/24/1994 |
| 5306340 | Scleroglucan-based compositions and their use as a cementation spacer Use of scleroglucan alone or of mixtures of scleroglucan with a polyalcohol or a dialdehyde as cementation spacers during oil drilling operations.... | 04/26/1994 |
| 5304601 | Catalysts based on a faujasite and its application A catalyst is provided which contains 1 to 99 wt. % of an inorganic binder and 99 to 1% of a zeolite consisting of a faujasite having an Si:Al synthesis ratio at least equal to 3 and 30 and the compensation cations of this zeolite consist partly or wholly... | 04/19/1994 |
| 5302810 | Method for rapid and uniform heating of a multilayer assembly comprising at least one thin layer based on an ion-conducting macromolecular material interleaved between two structures with high electronic conduction Between the high electronic conduction structures of the multilayer assembly an electric voltage signal is applied of which at least one portion includes an alternating component which has an amplitude between 0.05 and 100 volts and a frequency lower than... | 04/12/1994 |
| 5299638 | Process for transporting particles in a porous medium The invention relates to an improved method for injecting and transporting small particles in a natural porous medium. The method is characterized in that, in a first step, the porous medium is conditioned by means of an aqueous solution containing a hydr... | 04/05/1994 |
| 5294348 | Process for removing ammonia from waste waters A method for removing ammonia, or ammonia and phosphates from industrial agricultural or household effluents by causing precipitation as magnesium ammonium phosphate by means of a liquid reagent containing magnesium and phosphate ions and an acid. The eff... | 03/15/1994 |
| 5277791 | Zeolite from the class of mazzite, process for its synthesis, and its use as a catalyst This invention relates to a new zeolite from the class of mazzite, containing a fraction of non-exchangeable potassium cations, and also to a process for its synthesis. The crystallinity and the adsorption capacity of the protonated form of this zeolite a... | 01/11/1994 |
| 5273945 | Zeolite catalyst of hexagonal structure and its application A catalyst is provided which contains 1 to 99 wt. % of a zeolite related to faujasite and having a hexagonally symmetrical structure and an Si:Al ratio between 3 and 30. The compensation cations of this zeolite consist partly or wholly of cations of one o... | 12/28/1993 |
| 5264602 | Chiral phosphinite-boranes, their preparation and uses This invention is concerned with new chiral diphosphinite-borane compound of the formula ##STR1## wherein R1 and R2, identical or different, represent each a C1 -C18 alkyl, C5 -C18 cyc... | 11/23/1993 |
| 5262525 | Method for the chemical modification of proteins Method for the chemical modification of proteins using a reagent of general formula ##STR1## obtained from the diene ##STR2## and maleic anhydride by Diels-Alder addition.... | 11/16/1993 |
| 5262373 | Process for the synthesis of metal oxides of high specific surface area and high porosity, oxides obtained and catalysts containing the said oxides A process is provided for the synthesis for metal oxides of high specific surface area and high porosity which are particularly useful as catalyst supports. The process comprises forming a mixture of a salt of at least one metal and a molten salt medium c... | 11/16/1993 |
| 5260145 | Production of organic cation radicals in an electrochemical cell Process for producing organic cation radicals using anodic oxidation of an organic molecule in an electrochemical cell containing two electrodes upon which opposite polarity may be established and a liquid electrolyte which is an ion conductive material c... | 11/09/1993 |
| 5256821 | Method of synthesis of sulphonylimides Method for the synthesis of sulfonylimidides having the formula M((RSO2)2 N)y, wherein M is a metal or an ammonium radical quaternary or not, the Rs, which may be identical or similar are organic monovalent radicals, parti... | 10/26/1993 |
| 5250784 | Method and device for cutting a multilayer assembly composed of a plurality of thin films and comprising a thin film electrochemical generator or a component part thereof At least one laser beam is focused on one side of an assembly to be cut at a point on the side which is part of the cutting profile and which is called the point of impact of the beam on side side, in order to cause at that point a disintegration of the m... | 10/05/1993 |
| 5246902 | Synthetic microporous solids containing gallium and phosphorous, their synthesis and their use as catalysts and adsorbents This invention relates to a crystalline synthetic microporous solid containing gallium and phosphorus, whose crystal structure is of the LTA type. After calcination at a temperature above 200° C. the solid obtained can be employed as a catalyst for conve... | 09/21/1993 |
| 5243409 | Apparatus for measuring optical density in situ A device for measuring in situ, the optical density of a sample in a medium, in which the immersed sample has a main part with a slot at one end. A mobile part can be lodged in this slot. This mobile part has an open chamber which moves with the mobile pa... | 09/07/1993 |
| 5224988 | Process for improving the dispersibility and filterability of scleroglucan powders Process for improving the dispersibility and the filterability of scleroglucan powders, in which a surfactant is incorporated in the coagulated polymer. The powder obtained according to the process has a dispersibility and a filterability after drying of ... | 07/06/1993 |
| 5215681 | Concentrated liquid solutions of scleroglucan The invention relates to new concentrated liquid solutions of polysaccharides, characterized in that they are prepared by ultrafiltration of a dilute solution of polymer to which a surface-active agent has been added. The solutions can be employed, after ... | 06/01/1993 |
| 5192520 | Synthesis of aluminosilicate zeolites of faujasite structure An aluminosilicate gel containing an ST structuring agent whose composition is suitable for crystallization into a zeolite of the faujasite structural family is prepared. The gel then undergoes crystallization in order to form a zeolite precursor which co... | 03/09/1993 |
| 5165906 | Zeolite from the class of mazzite, process for its synthesis, an its use as a catalyst This invention relates to a new zeolite from the class of mazzite, containing a fraction of non-exchangeable potassium cations, and also to a process for its synthesis. The crystallinity and the adsorption capacity of the protonated form of this zeolite a... | 11/24/1992 |
| 5162177 | Ion conductive material composed of a salt in solution in a liquid electrolyte Ionically conductive material consisting essentially of a salt diluted in a liquid aprotic solvent. The salt is represented by one of the following formulas: ##STR1## where M is an alkaline or alkaline earth metal, a transition metal or a rare e... | 11/10/1992 |
| 5158757 | Synthesis of gallosilicate zeolites having faujasite structure Disclosed is a process for the preparation of zeolites having a gallosilicate skeleton and belonging to the structural class of faujasite in which there is first formed a precursor of the zeolite which entraps a structuring agent which is thereafter destr... | 10/27/1992 |
