Gums Or Derivatives Patents (Class 536/114)
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Patent number: 5756720Abstract: Nonionic and cationic derivatized guar gum which demonstrates greater than 75% light transmission at a wavelength of from about 500-600 nanometers when dispersed in water in the amount of 0.5 parts per 100 parts water and the process for producing such guar gum is disclosed. The compositions are particularly useful for producing products having utility in personal care and industrial cleaning products.Type: GrantFiled: October 25, 1996Date of Patent: May 26, 1998Assignee: Rhodia Inc.Inventor: Manjit Singh Chowdhary
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Patent number: 5756721Abstract: A steam-stripping process suitable for the removal of impurities from polysaccharides, including soluble starch hydrolysates, is disclosed herein. This process may be used in combination with other purification processes, such as ultrafiltration, ion exchange, treatment with activated carbon, as well as bleaching process. Soluble starch hydrolysates may also be purified by a combination of ultrafiltration or activated carbon treatment and bleaching. In these processes, the polysaccharide or the soluble starch hydrolysate produced is bland in flavor, free of off-odor, optionally, lighter or white in color and suitable for use in systems requiring these characteristics.Type: GrantFiled: August 29, 1994Date of Patent: May 26, 1998Assignee: National Starch and Chemical Investment Holding CorporationInventors: James Eden, James Kasica, Leo Walsh, Morton W. Rutenberg, Norman Lacourse, Daniel Solarek, Timothy G. Koubek
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Patent number: 5728825Abstract: A composition comprising a mixture of xanthan gum, a surfactant and a chelating salt, wherein said surfactant is present in an amount of from about 0.1% to about 3.0% by weight of the total weight of the composition, and wherein said chelating salt is present in an amount of from about 0.1% to about 3.0% by weight of the total weight of the composition is provided.Type: GrantFiled: December 18, 1995Date of Patent: March 17, 1998Assignee: Rhone-Poulenc Inc.Inventor: Philip Wong
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Patent number: 5725605Abstract: A liquid dispersant concentrate stable against clouding at a temperature of 10.degree. C. to 35.degree. C. containing: (a) from 20% to 50% by weight of the degradation products of polysaccharides containing uronic acid units; and (b) the remainder, water, all weights being based on the weight of the concentrate.Type: GrantFiled: March 28, 1996Date of Patent: March 10, 1998Assignee: Gruenau Illertissen GmbGInventors: Birgit Maunz, Dieter Hietsch, Joerg Schad
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Patent number: 5726161Abstract: The invention deals with porous aggregates and a process for making same. The aggregates generally comprise discrete particles which are bound together, the aggregates having intra-aggregate volumes which may contain drug substances or other functional substances.Type: GrantFiled: July 12, 1996Date of Patent: March 10, 1998Assignee: Fuisz Technologies Ltd.Inventor: Roy L. Whistler
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Patent number: 5726031Abstract: A test method and medium for quantitatively identifying and distinguishing biological materials in a test sample. A first biological material has enzyme specificity for a first chromogenic substrate, a second biological material has enzyme specificity for a second chromogenic substrate, and a third biological material has specificity for one of the substrates. The chromogenic substrates form respective first and second colored water insoluble compounds upon reaction with specific enzymes. The first and second biological materials are capable of fermenting a sugar, and the third material does not ferment sugar. The test medium is adjusted to a pH conducive for color change of a pH indicator upon acidification due to fermentation, resulting in the formation of a zone of a third color around the water insoluble compounds of the sugar-fermenting materials.Type: GrantFiled: March 26, 1996Date of Patent: March 10, 1998Assignee: RCR Scientific, Inc.Inventors: Jonathan N. Roth, Gordon L. Bontrager
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Patent number: 5723601Abstract: Porous material of a polysaccharide and a method for preparations of such a material, wherein a water-based solution of the polysaccharide is mixed, with controlled stirring, with an essentially water-immiscible organic phase to form an emulsion, which when allowed to solidify, just before or during the gelling process, forms a network of two continuous phases, an aqueous polysaccharide phase and a flow-pore-forming organic phase, resulting in a material with two types of pores: small diameter diffusion pores and large diameter flow through pores.Type: GrantFiled: September 16, 1994Date of Patent: March 3, 1998Assignee: Pharmacia Biotech ABInventor: Per Olof Larsson
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Patent number: 5707972Abstract: The present invention provides a pharmaceutical preparation for the treatment of a wound consisting essentially of 200-mesh or finer powder of one or more hydrophilic polysaccharides selected from the group consisting of glucomannan and guar gum. Also provided is a pharmaceutical preparation for prophylaxis and treatment of chapped skin consisting essentially of an aqueous solution of one or more hydrophilic polysaccharides selected from the group consisting of glucomannan and guar gum.Type: GrantFiled: March 5, 1996Date of Patent: January 13, 1998Assignee: Shimizu Chemical CorporationInventor: Hideki Shimizu
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Patent number: 5705368Abstract: The process comprises heat-treating a xanthan gum fermented broth, and consecutively treating the broth first with alkaline protease and then with lysozyme or in reverse order, and thereafter recovering xanthan gum from the treated broth. A clear aqueous solution of xanthan gum may be obtained without complex procedures.Type: GrantFiled: December 15, 1992Date of Patent: January 6, 1998Assignees: Shin-Etsu Chemical Co., Ltd., Shin-Etsu Bio, Inc.Inventors: Kanji Murofushi, Taira Homma, Shigehiro Nagura, Richard Armentrout
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Patent number: 5700917Abstract: Aldehyde cationic derivatives of galactose containing polysaccharides which are obtained by oxidizing galactose containing polysaccharides with the enzyme galactose oxidase. The enzyme oxidized products have an aldehyde function at a specific position of the polysaccharide, i.e., the C.sub.6 position, of the galactose unit, and the cationic derivatives thereof have unexpected and significantly improved properties when used as paper strength additives.Type: GrantFiled: April 5, 1996Date of Patent: December 23, 1997Assignee: National Starch and Chemical Investment Holding CorporationInventors: Chung-Wai Chiu, Roger Jeffcoat, Matthew Henley, Leroy Peek
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Patent number: 5688776Abstract: The invention relates to polysaccharides which are crosslinked with bifunctional crosslinkers and are no longer water-soluble but are still biodegradable, have a swelling of from 100 to 1000%, where the swelling, which means the percentage gain in weight, is determined by the following equation: ##EQU1## in which A is the percentage gain in weight, W.sub.o is the weight of the dry polymer and W.sub.t is the weight of the swollen polymer saturated with water. It likewise relates to a process for preparing the crosslinked polysaccharides and to the use of the crosslinked polysaccharides for coating and/or embedding medicinal active substances or drug compositions. The invention furthermore relates to a drug which contains an active substance which acts in the large intestine or an active substance which is broken down on passing through the stomach or small intestine, coated with or embedded in one of the crosslinked polysaccharides.Type: GrantFiled: September 16, 1994Date of Patent: November 18, 1997Assignee: BASF AktiengesellschaftInventors: Kurt Heinz Bauer, Juergen Betzing
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Patent number: 5683991Abstract: The invention concerns a pharmaceutical preparation which contains one or several galacturonides as the active substance with a degree of polymerization of .gtoreq.2 and a degree of esterification of <20% optionally together with common pharmaceutical carriers, diluents, auxiliary substances and fillers as well as the use of this preparation to block the attachment of germs to mammalian cells.Type: GrantFiled: March 8, 1996Date of Patent: November 4, 1997Assignee: Laevosan-GesellschaftInventors: Josef Peter Guggenbichler, Peter Meissner, Johann Jurenitsch, Andreas De Bettignies-Dutz
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Patent number: 5679556Abstract: A xanthan gum-containing fermented solution is subjected to an enzyme treatment for solubilizing the microbial cells present in the fermented solution. While the fermented solution having undergone the enzyme treatment is maintained at a temperature of 50.degree. C. to 80.degree. C., and xanthan gum is precipitated by adding an hydrophilic organic solvent incapable of dissolving xanthan gum to the fermented solution. When a rotary turbine is used, the precipitate can be cut with a shearing cutter to recover a finely-divided fibrous product.Type: GrantFiled: June 7, 1995Date of Patent: October 21, 1997Assignees: Shin-Etsu Chemical Co., Ltd., Shin-Etsu Bio, Inc.Inventors: Taira Homma, Kanji Murofushi, Shigehiro Nagura
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Patent number: 5670490Abstract: A porous aggregate having a high intraaggregate reticular volume for releasable containment of functional substances is described. The porous aggregates comprise discrete particles, preferably starch granules, bound together at least at their points of contact in the aggregates. The surfaces of the discrete particles cooperate to define an intraaggregate reticulate volume. The porous aggregate composition of this invention finds use as a high capacity carrier of functional substances for a wide variety of applications, in which the functional substance is released from the aggregate composition under the influence of mechanical compression/disintegration, by degradation or dissolution of the binder and/or particulate components, or by diffusion from the porous surface.Type: GrantFiled: January 16, 1996Date of Patent: September 23, 1997Assignee: Fuisz Technologies Ltd.Inventor: Roy L. Whistler
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Patent number: 5658893Abstract: A method is provided for inhibiting rotavirus infection of human cells by treating the rotavirus with a carrageenan. The most effective agent in inhibiting cellular rotavirus infection is lambda-carrageenan, which may be formulated in a liquid and ingested enterally. A composition containing lambda-carrageenan is an aspect of the invention.Type: GrantFiled: March 29, 1995Date of Patent: August 19, 1997Assignee: Abbott LaboratoriesInventors: Steven Neal Anderson, Joseph Paul Schaller, Terrence Bruce Mazer, Stephen John Kirchner
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Patent number: 5635492Abstract: A teat-treating composition comprising a biocide in an aqueous medium characterised in that it also comprises a pseudo-plastically- or thixotropically-effective amount of Rhamsan gum is disclosed, as is the production thereof by mixing the components.Such compositions may be used to counter mastitis, particularly in dairy cattle, by dipping or spraying cows' teats.Type: GrantFiled: September 3, 1991Date of Patent: June 3, 1997Assignee: Diversey Lever, Inc.Inventor: Michael P. Corby
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Patent number: 5621094Abstract: A method of preserving delicate biological substances or organic compounds (a) in a dry state and/or (b) at elevated temperatures and/or (c) under irradiation comprises incorporating in a system containing the said substances or compounds, a sugar or a sugar derivative selected from (i) a non-reducing glycoside of a polyhydroxy compound selected from sugar alcohols and other straight chain polyalcohols, or (ii) a non-reducing oligosaccharide selected from raffinose, stachyose and melezitose. In particular, methods for preserving dehydrated agarose gels comprising adding lactitol or glucopyranosyl-mannitol or glucopyranosyl-sorbitol to the gel during formation and prior to dehydration are disclosed.Type: GrantFiled: June 8, 1994Date of Patent: April 15, 1997Assignee: Quadrant Holdings Cambridge LimitedInventors: Bruce J. Roser, Camilo Colaco
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Patent number: 5612475Abstract: A process for sizing natural and synthetic yarns by contacting the yarns with a sizing agent containing alkali metal salts of carboxymethyl guar galactomannan having degrees of substitution below 0.15.Type: GrantFiled: December 20, 1995Date of Patent: March 18, 1997Assignee: Henkel Kommanditgesellschaft auf AktienInventors: Hans P. Miemietz, Kaspar Schlueter, Siegrid Waltenberger-Scharffetter, Bernhard Wuestnienhaus
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Patent number: 5591699Abstract: A non-acetylated but otherwise unmodified xanthan heteropolysaccharide polymer plus guar gum, is employed to impart viscosity to an aqueous particle transport fluid (such as a drilling fluid, a fracturing fluid, or a filter structure emplacement fluid) sufficient to suspend mineral particles. A cross linking agent can also be employed to decrease the amounts of xanthan heteropolysaccharide polymer and guar gum which are needed for particle suspension.Type: GrantFiled: December 21, 1994Date of Patent: January 7, 1997Assignee: E. I. du Pont de Nemours and CompanyInventor: Richard M. Hodge
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Patent number: 5585366Abstract: A method for reducing the cholesterol level in mammalian blood by administering a water soluble cellulose ether thereto. The cellulose ethers have a viscosity, measured as a 2% aqueous solution at 20.degree. C., of at least about 35 cps. Oral administration is preferred, and, in one embodiment the high viscosity water soluble cellulose ether is hydroxypropyl methylcellulose, contained in a nutritious foodstuff.Type: GrantFiled: May 19, 1995Date of Patent: December 17, 1996Assignee: Regents of the University of MinnesotaInventors: Daniel D. Gallaher, Craig A. Hassel
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Patent number: 5583211Abstract: Disclosed herein are surface activated, organic polymers useful for biopolymer synthesis. Most preferably, aminated polypropylene is used for the synthesis of oligonucleotides thereto, and these devices are most preferably utilized for genetic analysis of patient samples.Type: GrantFiled: November 22, 1994Date of Patent: December 10, 1996Assignee: Beckman Instruments, Inc.Inventors: Peter J. Coassin, Robert Matson, Jang Rampal
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Patent number: 5580763Abstract: A method for the fermentation production of xanthan gum which comprises the step of carrying out culture by using a water-soluble inorganic nitrogen component alone as the nitrogen source of a production medium, and by mixing and using the water-soluble inorganic nitrogen component and a water-insoluble organic nitrogen component as the nitrogen sources of a seed fermentation medium.Type: GrantFiled: August 25, 1994Date of Patent: December 3, 1996Assignees: Shin-Etsu Chemical Co., Ltd., Shin-Etsu Bio, Inc.Inventors: Taira Honma, Shigehiro Nagura, Kanji Murofushi
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Patent number: 5554745Abstract: Aldehyde cationic derivatives of galactose containing polysaccharides which are obtained by oxidizing galactose containing polysaccharides with the enzyme galactose oxidase. The enzyme oxidized products have an aldehyde function at a specific position of the polysaccharide, i.e., the C.sub.6 position, of the galactose unit, and the cationic derivatives thereof have unexpected and significantly improved properties when used as paper strength additives.Type: GrantFiled: April 21, 1995Date of Patent: September 10, 1996Assignee: National Starch and Chemical Investment Holding CorporationInventors: Chung-Wai Chiu, Roger Jeffcoat, Matthew Henley, Leroy Peek
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Patent number: 5550224Abstract: Aerial spray or discharge drift is controlled 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: January 3, 1994Date of Patent: August 27, 1996Inventor: James L. Hazen
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Patent number: 5547863Abstract: Soil isolates, identified as strains of Bacillus polymyxa, NRRL B-18475 and NRRL B-18476, produce large quantities of a pure and uniform extracellular polysaccharide fructan (levan), in a sucrose medium. The levan consists entirely of fructose and the residues linked by .beta., 2-6 fructofuranoside linkage.Type: GrantFiled: August 14, 1989Date of Patent: August 20, 1996Assignee: The United States of America as represented by the Secretary of the AgricultureInventors: Youn W. Han, Margaret A. Clarke
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Patent number: 5541304Abstract: This invention provides a method of altering the water content of a hydrogel comprising treatment of said hydrogel with a liquid dehydrating composition. There is further provided a method of altering the water content of a hydrogel-containing medical device. The medical devices of the present invention comprise a hydrogel having a water level ex vivo lower than the thermodynamic equilibrium water level when in vivo. These medical devices comprise a hydrogel contacted with a liquid dehydrating agent, wherein said medical device has a lower water level ex vivo than the thermodynamic equilibrium water level when the medical device is in vivo.Type: GrantFiled: May 2, 1994Date of Patent: July 30, 1996Assignee: Hercules IncorporatedInventor: Samuel A. Thompson
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Patent number: 5536825Abstract: Derivatized guar gum which demonstrates greater than 75% light transmission at a wavelength of from about 500-600 nanometers when dispersed in water in the amount of 0.5 parts per 100 parts water and the process for producing such guar gum is disclosed.Type: GrantFiled: June 9, 1994Date of Patent: July 16, 1996Assignee: Rhone-Poulenc Inc.Inventors: Michael H. Yeh, Ian William Cottrell
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Patent number: 5536651Abstract: The present invention relates toa mutant strain of Xanthomonas campestris;a method of preparing xanthan by fermentation of said strain; anda non-viscous xanthan capable of being obtained by said method.Type: GrantFiled: March 15, 1995Date of Patent: July 16, 1996Assignees: Sanofi, Societe Nationale Elf AguitaineInventor: Marc Salome
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Patent number: 5532350Abstract: A solid composition of matter comprising one or more polysaccharides which has been cross-linked with either titanium or zirconium cross-linking agents is provided. The composition demonstrates absorbent properties and is useful in absorbent articles of manufacture. Also provided is a method for preparing the compositions.Type: GrantFiled: February 15, 1994Date of Patent: July 2, 1996Assignee: Rhone-Poulenc Inc.Inventors: Ian W. Cottrell, Animesh Goswami, Manjit S. Chowdhary
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Patent number: 5525368Abstract: A degradation product of a polysaccharide derivative comprising a mixture of oligomers of the polysaccharide derivative, the majority of said oligomers having a molecular weight such that the oligomer conforms to a rod-like configuration.Type: GrantFiled: June 6, 1994Date of Patent: June 11, 1996Assignee: Alko Group Ltd.Inventors: ChoKyun Rha, Timo Vaara, Maritta Timonen, Tarja Lahtinen, Marja Turunen, Martti Vaara, Lindsey Bagley, Sarah Bosdet, Michael Lindley
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Patent number: 5514792Abstract: Chemically modified succinoglycan polysaccharides, e.g., acidic or enzymatic hydrolysates, have a reduced content of pyruvic acid and succinic acid structural units relative to the unmodified such succinoglycans, and are well suited, whether in fibrous, powdery or gel state, for use, e.g., as thickening stabilizing or suspending agents, in foodstuff, cosmetic and a variety of other compositions.Type: GrantFiled: February 17, 1995Date of Patent: May 7, 1996Assignee: Rhone-Poulenc ChimieInventors: Magali Knipper, Michele Raffart, Alain Senechal
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Patent number: 5514791Abstract: Variant xanthan gums are provided which include a water-soluble polysaccharide polymer comprising repeating pentamer units having a D-glucose:D-mannose:D-glucuronic acid ratio of about 2:2:1, and a water-soluble polysaccharide polymer comprising repeating tetramer units having a D-glucose:D-mannose:D-glucuronic acid ratio of about 2:1:1. The D-glucose moieties are linked in a beta- 1,4! configuration. The inner D-mannose moieties are linked in an alpha- 1,3! configuration, generally to alternate glucose moieties. The D-glucuronic acid moieties are linked in a beta- 1,2! configuration to the inner mannose moieties. The outer mannose moieties are linked to the glucuronic acid moieties in a beta- 1,4! configuration. Processes for preparing the polysaccharide polymers are also provided.Type: GrantFiled: April 25, 1994Date of Patent: May 7, 1996Assignee: Getty Scientific Development CompanyInventors: Daniel H. Doherty, Donna M. Ferber, John D. Marrelli, Rebecca W. Vanderslice, Randal A. Hassler
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Patent number: 5504079Abstract: Modified yeast cell wall glucans are administered to patients who are at risk for infection due to imminent surgery, chemotherapy or other treatment which affects the immune system, in order to mobilize the cellular defense mechanisms and boost the immune response of the patient before, during and after the surgery, chemotherapy or other treatment.Type: GrantFiled: November 14, 1994Date of Patent: April 2, 1996Assignee: Alpha-Beta Technology, Inc.Inventors: Spiros Jamas, D. Davidson Easson, Jr., Gary R. Ostroff
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Patent number: 5502179Abstract: A carrageenan product which is useful as an emulsifyer and for thickening or gelling aqueous systems is made by subjecting a carrageenan-containing material in which 6-sulphated galactose units have been converted into 3,6-anhydro galactose units to a shear stress treatment, e.g., by means of an extruder. The starting seaweed material, typically originating from Gigartinaceae and Solieriaceae, has been subjected to a treatment in a substantially homogeneous mixture of a solvent in which carrageenan is substantially insoluble, and a basic aqueous phase. The base-treated carrageenan-containing product is also useful per se. The shear stress treated carrageenan product shows a maximum swelling temperature of at the most 85.degree. C. and exhibits a light transmission of at least 5% and has a cellulose content of at least 0.5% by weight.Type: GrantFiled: July 12, 1994Date of Patent: March 26, 1996Assignee: Grinsted Products A/S (Danisco A/S)Inventor: Peter F. Larsen
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Patent number: 5498702Abstract: A process for manufacturing a treated polyuronic acid. The process involves heating an aqueous dispersion of a polyuronic acid, such as a pectin, at a temperature above about 100.degree. C. for an amount of time sufficient to obtain a hydrolyzed, or treated, polyuronic acid mixture which separates upon standing and cooling into a clear solution, which is the hydrolyzed polyuronic acid phase, and a precipitate. The hydrolyzed polyuronic acid phase includes at least 25% of the polyuronic acid substance polymers having a degree of polymerization (DP) in the range of about DP1 to about DP20. The hydrolyzed polyuronic acid, or the treated polyuronic acid, then is recovered for use in a food product.Type: GrantFiled: December 16, 1993Date of Patent: March 12, 1996Assignee: California Natural ProductsInventors: Cheryl R. Mitchell, Pat R. Mitchell
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Patent number: 5498705Abstract: Disclosed is a method for producing a surface-crosslinked, modified polysaccharide having improved absorption properties. The method involves forming a mixture of water and a crosslinking agent, adding a generally water-soluble, modified polysaccharide to said mixture wherein the surface of the polysaccharide becomes crosslinked, and drying the modified polysaccharide. Also described is a surface-crosslinked, modified polysaccharide having improved absorption properties.Type: GrantFiled: February 22, 1995Date of Patent: March 12, 1996Assignee: Kimberly-Clark CorporationInventor: Jian Oin
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Patent number: 5493015Abstract: A method for reducing the number of contaminative live bacteria in xanthan gum which comprises the step of washing a mixture of 100 parts by weight of water-containing isopropanol having an isopropanol concentration of 50 to 100% by weight and 1 to 100 parts by weight of the xanthan gum under heating conditions.Type: GrantFiled: April 11, 1994Date of Patent: February 20, 1996Assignees: Shin-Etsu Chemical Co. Ltd., Shin-Etsu Bio, Inc.Inventors: Kanji Murofushi, Shigehiro Nagura
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Patent number: 5490978Abstract: Polysaccharides (e.g., dextran) of different molecular weights were substituted at the anomeric carbon with polyalkylene oxides of different molecular weights to give novel diblock copolymers. The copolymers inhibit bacterial aggregation. The copolymers are useful as antiplaque agents, as agents to prevent bacterial aggregation in an aqueous system or in a fermentation system.Type: GrantFiled: November 28, 1994Date of Patent: February 13, 1996Assignee: Chesebrough-Pond's USA Co., Division of Conopco, Inc.Inventors: Suree M. Spaltro, Kavssery Ananthapadmanabhan, Michael P. Aronson, Michael Frushour
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Patent number: 5486507Abstract: A porous aggregate having a high intraaggregate reticular volume for releasable containment of functional substances is described. The porous aggregates comprise discrete particles, preferably starch granules, bound together at least at their points of contact in the aggregates. The surfaces of the discrete particles cooperate to define an intraaggregate reticulate volume. The porous aggregate composition of this invention finds use as a high capacity carrier of functional substances for a wide variety of applications, in which the functional substance is released from the aggregate composition under the influence of mechanical compression/disintegration, by degradation or dissolution of the binder and/or particulate components, or by diffusion from the porous surface.Type: GrantFiled: January 14, 1994Date of Patent: January 23, 1996Assignee: Fuisz Technologies Ltd.Inventor: Roy L. Whistler
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Patent number: 5480785Abstract: A process of producing xanthan gum using a Xanthomonas microorganism is provided. Increased yields of xanthan gum are obtained by using mannose as part of the carbohydrate component of the fermentation feedstock. Preferably, the carbohydrate component of the feedstock is a mixture of mannose and glucose. More preferable is a mixture comprising 5 to 60% by weight mannose, particularly 20 to 45% by weight mannose, the balance being glucose although minor amounts of other sugars, e.g. maltose, may also be present. The carbohydrate component of the feedstock may be in the form of a raffinate stream from a glucose epimerization.Type: GrantFiled: January 21, 1994Date of Patent: January 2, 1996Assignee: Cerestar Holding B.V.Inventors: Jean-Claude M. G. de Troostembergh, Roland H. F. Beck, Benedicte L. T. De Wannemaeker
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Patent number: 5480984Abstract: Hydroxyethylcellulose (HEC), hydrophobically modified hydroxyethylcellulose (HMHEC), hydroxypropylcellulose (HPC), methylhydroxypropylcellulose (MHPC), carboxymethylhydroxyethylcellulose (CMHEC), guar, starch, xanthan, hydroxypropylguar (HP Guar) or carboxymethylhydroxypropylguar (CMHP Guar) are stepwise or continuously reacted with hydrogen peroxide to produce aqueous compositions with a solids content greater than 5% by weight at a viscosity at 25.degree. C. below 9500 mPa.s. It is preferred to use 30 to 50% hydrogen peroxide to depolymerize the polysaccharide.Type: GrantFiled: February 11, 1992Date of Patent: January 2, 1996Assignee: Aqualon CompanyInventors: John D. Angerer, Jashawant J. Modi, Robert C. Szafranski
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Patent number: 5473062Abstract: There is disclosed a process for producing purified xanthan gum, which comprises (i) adding a hydrophilic organic solvent to an aqueous solution containing crude xanthan gum with pH 0.5 to 2.5, and (ii) neutralizing the mixture with a base to precipitate the xanthan gum. The xanthan gum thus obtained has low contents of ash and remaining organic solvent, as well as a high quality with little impurities, and can advantageously be used in the fields of foods, cosmetics, medicaments and the like.Type: GrantFiled: October 29, 1993Date of Patent: December 5, 1995Assignee: Takeda Chemical Industries, Ltd.Inventors: Akira Haze, Kunihiro Ito, Norio Okutani
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Patent number: 5473059Abstract: Water soluble quaternary ammonium ethers of polysaccharides or polyols wherein the quaternary ammonium ether substituents correspond to the formula ##STR1## wherein R.sub.1 is a monohydroxylated or polyhydroxylated alkyl group containing between about one and about six carbon atoms; R.sub.2 and R.sub.3 are independently, alkyl groups containing between about one and about six carbon atoms; R.sub.4 is an alkyl group containing between about six and about 24 carbon atoms; and X is a halide, wherein the degree of substitution of said ethers ranges from about 0.001 to about 0.5. is provided. The composition have multiple uses as thickeners and are particularly suited for use in personal care products.Type: GrantFiled: October 13, 1994Date of Patent: December 5, 1995Assignee: Rhone-Poulenc Inc.Inventor: Michael H. Yeh
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Patent number: 5470964Abstract: Disclosed is a method for producing a surface-crosslinked, modified polysaccharide having improved absorption properties. The method involves forming a mixture of water and a crosslinking agent, adding a generally water-soluble, modified polysaccharide to said mixture wherein the surface of the polysaccharide becomes crosslinked, and drying the modified polysaccharide. Also described is a surface-crosslinked, modified polysaccharide having improved absorption properties.Type: GrantFiled: September 2, 1993Date of Patent: November 28, 1995Assignee: Kimberly-Clark CorporationInventor: Jian Qin
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Patent number: 5455342Abstract: A method and apparatus for the modification of the physical properties of polymers through pressure processing techniques. The apparatus is comprised of a piston device which acts on the polymer substrate charged within the confines of a compression chamber. The piston delivers an abrupt pressure change to the substrate for the purpose of effecting the desired modification of physical properties including altered thermal, viscosity, solubility, turbidity and hardness profiles. Predictable characteristics may be imparted to the substrate through variation of pressure duration and intensity as well as the number of piston strokes applied. Modification of the physical properties of starch and gum arabic, in particular, is disclosed.Type: GrantFiled: September 10, 1993Date of Patent: October 3, 1995Inventor: Bruce K. Redding, Jr.
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Patent number: 5454973Abstract: Mineral acid slurries of benzidine derivatives having high stability are provided by incorporating into such slurries a polysaccharide.Type: GrantFiled: October 14, 1993Date of Patent: October 3, 1995Assignee: Wakayama Seika Kogyo Co., Ltd.Inventors: Fumio Koseki, Kenjiro Fujiki, Motonori Takeda, Katsutoshi Tao
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Patent number: 5434078Abstract: The present invention relates to the unexpected discovery that xanthan gum can be produced from filtered whey or milk products, including whey permeates and milk permeates, by a fermentation process which uses organisms which are capable of converting lactose to xanthan gum.Type: GrantFiled: May 11, 1993Date of Patent: July 18, 1995Assignees: Shin-Etsu Bio, Inc., Shin-Etsu Chemical Co., Ltd.Inventors: Thomas J. Pollock, Richard W. Armentrout
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Patent number: 5424300Abstract: An agent for treatment of chronic fatigue syndrome, which comprises a polysaccharide having a .beta.-1,3-glucoside bond in the main chain as an effective ingredient.Type: GrantFiled: October 13, 1993Date of Patent: June 13, 1995Assignee: Kaken Pharmaceutical Co.Inventor: Atsushi Uchida
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Patent number: 5416077Abstract: There is disclosed liquid nutritionals with improved physical stability. The nutritionals are pourable yet able to hold minerals in suspension without sedimentation or sag. The invention comprises the use of iota-carrageenan of a concentration of between 50-1500 parts per million. The nutritional may also comprise kappa carrageenan at a concentration of less than 25% of the total concentration of iota- and kappa-carrageenan. There is further disclosed a method for preparing the liquid nutritional through the use of ultra-high temperature heat treatment.Type: GrantFiled: May 20, 1994Date of Patent: May 16, 1995Assignee: Abbott LaboratoriesInventors: Shie-Ming Hwang, Timothy W. Schenz, James N. Chmura
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Patent number: 5416206Abstract: A modified xanthan gum has a viscosity of not less than 800 cP as determined on a 0.5% by weight solution thereof in a 12% by weight aqueous sodium chloride solution at 20.degree. C. and a ratio of this viscosity to that determined on a 0.5% by weight solution thereof in distilled water of not less than 1.5. The modified xanthan gum can be prepared by a method comprising the steps of mixing an organic solvent which does not dissolve xanthan gum and is hydrophilic with an aqueous solution of xanthan gum in a mixer, cutting, into fine fibrous materials, deposites formed in the mixed solution together with the mixed solution with a cutter, separating and recovering the suspended fine fibrous materials from the mixed solution and then drying the materials at a temperature of not more than 80.degree. C. The modified xanthan gum can directly be dissolved in aqueous solutions of salts such as common salt even at room temperature and can thus easily show a desired effect of thickening the aqueous salt solutions.Type: GrantFiled: November 30, 1992Date of Patent: May 16, 1995Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Shigehiro Nagura, Kanji Murofushi, Kazumasa Maruyama