Sulfur Containing Patents (Class 536/92)
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Publication number: 20150119568Abstract: This invention concerns the first environmentally benign heterogeneous modification of polysaccharide-based material in native solid state by thiol-ene “click chemistry”. The direct reaction of a thiol with an un-activated double or triple bond by thiol-ene and thiol-enyne click modification is thermally or photochemically catalyzed and is completely metal-free and allows for a highly modular approach to modifications of fibers and fiber-based materials.Type: ApplicationFiled: January 9, 2015Publication date: April 30, 2015Inventors: Armando CORDOVA, Jonas HAFREN
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Patent number: 8962823Abstract: This invention concerns the first environmentally benign heterogeneous modification of polysaccharide-based material in native solid state by thiol-ene “click chemistry”. The direct reaction of a thiol with an un-activated double or triple bond by thiol-ene and thiol-enyne click modification is thermally or photochemically catalyzed and is completely metal-free and allows for a highly modular approach to modifications of fibers and fiber-based materials.Type: GrantFiled: January 19, 2011Date of Patent: February 24, 2015Assignee: Organoclick ABInventors: Armando Cordova, Jonas Hafren
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Publication number: 20140371443Abstract: Forming multifunctional materials and composites thereof includes contacting a first material having a plurality of oxygen-containing functional groups with a chalcogenide compound, and initiating a chemical reaction between the first material and the chalcogenide compound, thereby replacing oxygen in some of the oxygen-containing functional groups with chalcogen from the chalcogen-containing compound to yield a second material having chalcogen-containing functional groups and oxygen-containing functional groups. The first material is a carbonaceous material or a macromolecular material. A product including the second material is collected and may be processed further to yield a modified product or a composite.Type: ApplicationFiled: February 15, 2013Publication date: December 18, 2014Inventors: Dong-Kyun Seo, Ki-Wan Jeon
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Patent number: 8779119Abstract: The invention provides a metal salt of a crosslinked cellulose derivative represented by the following formula (I), wherein the degree of substitution of the hydroxyl group of glucose unit of the crosslinked cellulose derivative by a functional group a is 1 or more. R—O—A??(I) {In the formula (I), R represents a crosslinked cellulose residue and A represents a functional group a having cation-exchange ability.Type: GrantFiled: December 26, 2007Date of Patent: July 15, 2014Assignee: JNC CorporationInventors: Naoyuki Yoshida, Kazushi Ishida, Shuji Sasaki, Ippei Yamaoka
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Publication number: 20140080214Abstract: A method of making a scaffold for 3 dimensional cell culture comprising the steps of conjugating a reducible disulfide bond onto a hydroxyl group at the side chain of a hydroxypropyl cellulose; forming a matrix of hydroxypropyl cellulose having the reducible disulfide bond conjugated onto the hydroxyl group such that a reducible disulfide bond exists adjacent to a double bond for crosslinking the matrix of hydroxypropyl cellulose.Type: ApplicationFiled: January 9, 2013Publication date: March 20, 2014Inventors: Bramasta Nugraha, Hanry Yu
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Patent number: 7919614Abstract: Synthetic polysaccharides are disclosed containing 8-24 monosaccharide units made up of a concatenation of disaccharides consisting of a uronic acid and a hexose, wherein the hydroxyl groups of the polysaccharides are etherified with a C1-6 alkyl group or esterified in the form of a sulpho group, each disaccharide being at least monoetherified; and salts thereof, are disclosed.Type: GrantFiled: October 2, 2003Date of Patent: April 5, 2011Assignees: Sanofi-Aventis, Azko NobelInventors: Philippe Duchaussoy, Jean Marc Herbert, Guy Jaurand, Maurice Petitou, Constant Van Boeckel
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Publication number: 20100324280Abstract: The present invention provides a sodium absorption inhibitor, a potassium absorption inhibitor, and a phosphorus absorption inhibitor, and a preventive agent, a therapeutic agent and a food for diseases caused by overconsumption of common salt, potassium and phosphorus or diseases which require restriction of ingestion of common salt, potassium and phosphorus to actively and safely excrete overconsumed common salt, potassium and phosphorus excreted outside the body. R—O-A ??(I) {In the formula (I), R represents a crosslinked cellulose residue and A represents a functional group a having cation-exchange ability.Type: ApplicationFiled: December 26, 2007Publication date: December 23, 2010Applicant: OTSUKA Pharmaceutical Factory, Inc.Inventors: Ippei Yamaoka, Naoyuki Yoshida, Kazushi Ishida, Shuji Sasaki
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Publication number: 20100317844Abstract: The invention provides a metal salt of a crosslinked cellulose derivative represented by the following formula (I), wherein the degree of substitution of the hydroxyl group of glucose unit of the crosslinked cellulose derivative by a functional group a is 1 or more. R—O-A??(I) {In the formula (I), R represents a crosslinked cellulose residue and A represents a functional group a having cation-exchange ability.Type: ApplicationFiled: December 26, 2007Publication date: December 16, 2010Inventors: Naoyuki Yoshida, Kazushi Ishida, Shuji Sasaki, Ippei Yamaoka
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Patent number: 6924369Abstract: The present invention relates to water-soluble ionic cellulose ethers from the group of the hydroxyalkylcelluloses which are substituted by on average from 0.001 to 1.0 alkyl group per anhydroglucose unit and which carry from 0.01 to 0.1 sulfoalkyl group per anhydroglucose unit, to processes for preparing them and to the use of water-soluble ionic cellulose ethers from the group of the hydroxyalkylcelluloses which are substituted by on average from 0.001 to 1.0 alkyl group per anhydroglucose unit and which carry from 0.01 to 0.4 sulfoalkyl group per anhydroglucose unit as protective colloids in polymerizations.Type: GrantFiled: June 25, 2002Date of Patent: August 2, 2005Assignee: SE Tylose GmbH & Co., KGInventors: Reinhard Doenges, Horst Wurm
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Patent number: 6764768Abstract: An alkanethiol of formula (1): HS—L—Q1—T—Q2—M—G—Z (1), may for a SAM. Under application of a potential to the surface, the leaving group —Z is released.Type: GrantFiled: February 28, 2001Date of Patent: July 20, 2004Assignee: Arch Development CorporationInventors: Milan Mrksich, Christian Hodneland
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Patent number: 6656922Abstract: Polysaccharides, which are widely used as an anticoagulation drugs, especially heparin, are clinically administered only by intravenous or subcutaneous injection because of their strong hydrophilicity and high negative charge. Amphiphilic heparin derivatives were synthesized by conjugation to bile acids, sterols, and alkanoic acids, respectively. These heparin derivatives were slightly hydrophobic, exhibited good solubility in water, and have high anticoagulation activity. These slightly hydrophobic heparin derivatives are efficiently absorbed in the gastrointestinal tract and can be used in oral dosage forms. Methods of using these amphiphilic heparin derivatives and similarly modified macromolecules for oral administration are also disclosed.Type: GrantFiled: April 30, 2001Date of Patent: December 2, 2003Assignee: Mediplex Corporation, KoreaInventors: Youngro Byun, Yong-Kyu Lee
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Publication number: 20030208063Abstract: Water-soluble sulfoalkyl-containing hydrophobically modified cellulose ethers, processes for preparing them, and their use in emulsion paintsType: ApplicationFiled: September 19, 2001Publication date: November 6, 2003Inventors: Reinhard Doenges, Juergen Kirchner
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Patent number: 6627751Abstract: A hydrophobically modified anionic cellulose ether obtainable by a process comprising reacting an alkali metal cellulose with at least three alkylating reagents A, B, and C. Reagent A is selected from the group of haloacetic acids, alkali metal haloacetates, alkali metal vinyl sulfonates, and vinyl sulfonic acid. Reagent B has the formula R1—(OCH2CH(R2))n—P, wherein R1 represents a C2-C7 group, R2 is hydrogen or a methyl group, n is 0-2, and P represents a glycidyl ether group, a 3-halo-2-hydroxypropyl ether group, a 1,2-epoxy group, or a halide, and reagent C has the formula R3—(OCH2CH(R2))m—P, wherein R3 represents a C8-C30 group, m is 0-10, and R2 and P have the meaning as described above.Type: GrantFiled: December 6, 1999Date of Patent: September 30, 2003Assignee: Akko Nobel N.V.Inventors: Jan Gerardus Batelaan, Berend Jan Dijk, Peter Marten Van Der Horst
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Patent number: 6602994Abstract: A method for producing derivatized microfibrillar polysaccharide, including but not limited to cellulose, derivatized by steric and/or electrostatic forces, where the electrostatic forces are provided by anionic charge or by a combination of both anionic and cationic charge, by stabilizing and/or microfibrillating a polysaccharide starting material. A method of modifying the rheological properties of a composition of matter using derivatized microfibrillar polysaccharide. Method of improving coatings, paper manufacture, and the stability of emulsions, dispersions, and foams using a derivatized microfibrillar polysaccharide. Compositions that include derivatized microfibrillar polysaccharide, including paper compositions, comestible compositions, non-comestible spreadable compositions, and emulsions, dispersion, and foams.Type: GrantFiled: February 10, 1999Date of Patent: August 5, 2003Assignee: Hercules IncorporatedInventors: Mary Jean Cash, Anita N. Chan, Herbert Thompson Conner, Patrick Joseph Cowan, Robert Alan Gelman, Kate Marritt Lusvardi, Samuel Anthony Thompson, Frank Peine Tise
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Patent number: 6593468Abstract: This invention relates to a process for producing a substantially fiber-free carboxymethyl cellulose which predominantly exhibits elastic properties, to the use thereof as a superabsorbent material, and to the use thereof as an adjuvant substance for achieving suitable rheological and water retention properties for the cosmetics, pharmaceutical and food sectors, and for industrial applications, e.g. as an additive for coating materials, for the sealing of cables and for use in tunnelling and in civil and underground engineering.Type: GrantFiled: April 17, 2000Date of Patent: July 15, 2003Assignee: Wolff-Walsrode AGInventors: Werner Lange, Bernd Schriewer, Friedrich-Karl Lampert, Wilhelm Oppermann, Jörn-Bernd Pannek, René Kiesewetter
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Patent number: 6589943Abstract: Formulations for enhanced mucosal absorption of heparin are disclosed. In one embodiment, a powdered heparin composition is made by dissolving an amphiphilic heparin derivative including heparin covalently bonded to a hydrophobic agent in a water phase, dispersing the water phase in an organic phase such that an emulsion is formed, and drying the emulsion. In another embodiment, an amorphiphilic heparin derivative dispersed in an oil phase is made by dissolving the amphiphilic heparin derivative in water or a water/organic co-solvent, dispersing the water or co-solvent in the oil phase, and evaporating the water or co-solvent. In another embodiment, heparin-containing nanoparticles having surfactant molecules associated with a hydrophobic agent on the outside of the nanoparticles are made by dissolving the amphiphilic heparin derivative in an aqueous solvent, mixing the surfactant with the aqueous solvent, and disrupting nanoparticles of the amphiphilic heparin derivative.Type: GrantFiled: May 9, 2001Date of Patent: July 8, 2003Assignee: Mediplex Corporation, KoreaInventors: Youngro Byun, Yong-Kyu Lee
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Publication number: 20020188117Abstract: Water-soluble sulfoalkyl-containing hydrophobically modified cellulose ethers, processes for preparing them, and their use as protective colloids in polymerizationsType: ApplicationFiled: June 25, 2002Publication date: December 12, 2002Applicant: Clariant GmbHInventors: Reinhard Doenges, Horst Wurm
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Patent number: 6313287Abstract: Water-soluble sulfoalkyl-containing hydrophobically modified cellulose ethers, processes for preparing them, and their use in emulsion paints The present invention relates to water-soluble ionic cellulose ethers from the group of the hydroxyalkylcelluloses which are substituted by on average from 0.001 to 1.0 alkyl group per anhydroglucose unit and which carry from 0.01 to 0.1 sulfoalkyl group per anhydroglucose unit, to processes for preparing them and to the use of water-soluble ionic cellulose ethers from the group of the hydroxyalkylcelluloses which are substituted by on average from 0.001 to 1.0 alkyl group per anhydroglucose unit and which carry from 0.01 to 0.4 sulfoalkyl group per anhydroglucose unit in emulsion paints.Type: GrantFiled: October 26, 1999Date of Patent: November 6, 2001Assignee: Clariant GmbHInventors: Reinhard Doenges, Juergen Kirchner
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Patent number: 6245753Abstract: Polysaccharides, which are widely used as an anticoagulation drugs, especially heparin, are clinically administered only by intravenous or subcutaneous injection because of their strong hydrophilicity and high negative charge. Amphiphilic heparin derivatives were synthesized by conjugate to bile acids, sterols, and alkanoic acids, respectively. The hydrophobicity of the heparin derivatives depended on the feed mole ratio of heparin to hydrophobic agent. The heparin derivatives were slightly hydrophobic and exhibited good solubility in a water-acetone solvent, as well as water. The heparin derivatives have a high anticoagulant activity. These slightly hydrophobic heparin derivatives can be absorbed in gastric intestinal tract and can be used as oral dosage form. Also, the heparin derivatives can be used for the surface modification to prevent anticoagulation for medical devices such as extracorporeal devices and implanted devices.Type: GrantFiled: April 27, 1999Date of Patent: June 12, 2001Assignee: Mediplex Corporation, KoreaInventors: Youngro Byun, Yong-Kyu Lee
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Patent number: 6068697Abstract: A polysaccharide derivative prepared by replacing all or part of the hydroxyl hydrogen atoms of a polysaccharide or polysaccharide derivative by (A) a hydrophobic substituent having a C.sub.8 -C.sub.43 hydrocarbon chain as the partial structure and (B) an ionic hydrophilic substituent having at least one member selected from the group consisting of sulfonic, carboxyl phosphoric, and sulfate groups and salts thereof as the partial structure, wherein the average degree of replacement by the substituent (A) is 0.0001 or above but below 0.001 per constituent monosaccharide residue as determined by Zeisel's method or the diazomethane method and that by the substituent (B) is 0.01 to 2.0 per constituent monosaccharide residue as determined by colloidal titration. This polysaccharide derivative is useful as the admixture for hydraulic materials and can give stable hydraulic compositions excellent in dispersion.Type: GrantFiled: July 14, 1998Date of Patent: May 30, 2000Assignee: Kao CorporationInventors: Hotaka Yamamuro, Takeshi Ihara, Tomohito Kitsuki, Tetsuya Miyajima, Fujio Yamato, Makoto Kohama
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Patent number: 5986087Abstract: Sulfonated regenerated cellulose fiber obtained by adding a modifier to a viscose dope or alkali cellulose or cellulose solution and spinning fiber therefrom, wherefor the modifier is a starch etherified with C.sub.2 -C.sub.5 -alkylsulfonic acid radicals and having a degree of substitution of 0.1 to 3, a starch admixed with vinylsulfonic acid or a styrenesulfonic acid, or a polymeric styrenesulfonic acid or polymeric vinylsulfonic acid.Type: GrantFiled: November 21, 1997Date of Patent: November 16, 1999Assignee: DyStar Textilfarben GmbH & Co. Deutschland KGInventors: Andreas Schrell, Bernd Huber
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Patent number: 5866387Abstract: There is provided a method for immobilizing a ligand by reacting a solvent-insoluble carrier having aldehyde group with a compound shown by the general formula: ##STR1## wherein X is --S-- or --O--, R.sup.1, R.sup.2 and R.sup.6 are the same or different, each of which is hydrogen atom or an alkyl group having 1 to 4 carbon atoms, R.sup.3 is hydrogen atom or a substituent wherein an atom adjacent to nitrogen atom shown in the above-mentioned general formula has no unsaturated bond, R.sup.4, R.sup.5 and R.sup.7 are arbitrary substituents; provided that only one partial chemical structure of HX--C--C--NHR.sup.3 wherein X and R.sup.3 are the same as defined above or HX--C--C--C--NHR.sup.3 wherein X and R.sup.3 are the same as defined above is contained in one compound described above by which, a ligand or a compound to which a ligand is bonded can react specifically and effectively with aldehyde group in a solvent-insoluble carrier at a prescribed position to form a stable bond.Type: GrantFiled: August 28, 1997Date of Patent: February 2, 1999Assignee: Kanegafuchi Kagaku Kogyo Kabushiki KaishaInventors: Eiji Ogino, Kazuo Suzuki, Nobutaka Tani
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Patent number: 5808052Abstract: The present invention relates to water-soluble, particularly ternary, preferably ionic, cellulose mixed ethers, more particularly to anionic water-soluble cellulose mixed ethers, as additives for drilling fluid applications.Type: GrantFiled: June 10, 1996Date of Patent: September 15, 1998Assignee: Wolff Walsrode AGInventors: Klaus Szablikowski, Werner Lange, Jorn-Bernd Pannek, Rene Kiesewetter
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Patent number: 5807997Abstract: A method for the immobilization of an organic thiol compound, HS--R, in which R is an organic residue, to a water-insoluble polymer of non-polypeptide structure exhibiting a disulfide (--S--S--) group directly bound to a saturated carbon atom at each of its sulphur atoms, which comprising contacting the polymer with an oxidation agent in such an amount and of such a kind that it is capable of transforming the disulfide group (--S--S--) to an oxidized disulfide group capable of reacting with thiol groups, whereupon the polymer obtained exhibiting one or more oxidized disulfide groups is contacted with the organic thiol compound HS--R under conditions allowing reaction to the formation of one --S--S--R group and one --SO.sub.n (H) group per disulfide oxide group that undergoes the reaction, where n is 1 or 2.Type: GrantFiled: December 20, 1991Date of Patent: September 15, 1998Inventor: Francisco Batista
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Patent number: 5591844Abstract: The present invention relates to alkyl hydroxyalkyl cellulose ethers which contain a sulfoalkyl group as a further substituent, to a process for the preparation of these cellulose ethers and to building material mixtures which are based on gypsum, hydrated lime or cement and contain alkyl hydroxyalkyl cellulose ethers containing sulfoalkyl groups.Type: GrantFiled: November 28, 1994Date of Patent: January 7, 1997Assignee: Hoechst AktiengesellschaftInventors: Uwe Bartz, Reinhard D onges, Heiner Klehr
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Patent number: 5486606Abstract: A cellulosic polymer wherein at least a part of the hydroxyl groups of the cellulosic polymer is modified as represented by the following general formula [I]: ##STR1## wherein R.sup.1 and R.sup.2 may be the same or different and each represents a hydrogen atom or a C.sub.1 to C.sub.5 alkyl group, X is a strong negative atomic group, and Y is ##STR2## wherein R.sup.3 and R.sup.4 may be the same or different and each represents a member selected from the group consisting of a hydrogen atom, a C.sub.1 to C.sub.5 alkyl group and a C.sub.3 to C.sub.6 cycloalkyl group, or ##STR3## Y is wherein R.sup.5, R.sup.6 and R.sup.7 may be the same or different and each represents a member selected from the group consisting of a hydrogen atom, a C.sub.1 to C.sub.5 alkyl group, a C.sub.3 to C.sub.6 cycloalkyl group and a C.sub.6 to C.sub.10 aryl group, and n is from 1 to 10. Using the cellulosic polymer, a blood-treating device is assembled.Type: GrantFiled: May 4, 1993Date of Patent: January 23, 1996Assignee: Teijin LimitedInventors: Shingo Emi, Kyoji Suzuki, Yoshito Ikada
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Patent number: 5455341Abstract: The invention relates to certain highly substituted carboxymethyl sulfoethyl cellulose ethers (CMSEC), to a simplified and economic process for their production and to their use as thickeners in textile printing.Type: GrantFiled: December 1, 1993Date of Patent: October 3, 1995Assignee: Wolff Walsrode AktiengesellschaftInventors: Rene Kiesewetter, Reinhard Kniewske, Eugen Reinhardt, Klaus Szablikowski
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Patent number: 5441932Abstract: An inhibitor of the biosynthesis of sugar chains containing sialic acid that is excellent in the suppression of inflammation or allergy, which comprises as an active ingredient a sugar compound of the formula (1): ##STR1## wherein R.sup.1 is a hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group, a substituted or unsubstituted aromatic hydrocarbon group, a peptide residue or a glycoprotein, and R.sup.2 is a hydrogen atom, a sulfhydryl group, an acyloxy group, an acylthio group, an aryloxy group, an alkyloxy group or a glycothio residue. The inhibitor of the biosynthesis of sugar chains containing sialic acid may be used as a therapeutic agent for inflammation caused by sugar chains containing sialic acid.Type: GrantFiled: March 2, 1993Date of Patent: August 15, 1995Assignee: Japan Tobacco, Inc.Inventors: Hisashi Kodama, Hironobu Hashimoto, Yasuhiro Kajihara
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Patent number: 5442054Abstract: The present invention relates to sulphoalkylcellulose derivatives, in particular sulphoethylcellulose, with a degree of substitution by sulphoethyl groups of 1.2 to 2.0 using a one- to three-step, preferably two-step process and the use of the sulphoalkyl-cellulose derivatives as thickening agents or rheology improvers in textile printing.Type: GrantFiled: December 14, 1993Date of Patent: August 15, 1995Assignee: Wolff Walsrode AktiengesellschaftInventors: Rene Kiesewetter, Reinhard Kniewske, Eugen Reinhardt, Klaus Szablikowski
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Patent number: 5395930Abstract: The present invention relates to alkyl hydroxyalkyl cellulose ethers which contain a sulfoalkyl group as a further substituent, to a process for the preparation of these cellulose ethers and to building material mixtures which are based on gypsum, hydrated lime or cement and contain alkyl hydroxyalkyl cellulose ethers containing sulfoalkyl groups.Type: GrantFiled: June 7, 1993Date of Patent: March 7, 1995Assignee: Hoechst AGInventors: Uwe Bartz, Reinhard Donges, Heiner Klehr
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Patent number: 5385607Abstract: The invention relates to a new class of water-soluble ionic cellulose derivatives and their use as additive for gypsum- and cement-containing compounds.Type: GrantFiled: January 27, 1993Date of Patent: January 31, 1995Assignee: Wolff Walsrode AGInventors: Rene Kiesewetter, Klaus Szablikowski, Werner Lange
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Patent number: 5358561Abstract: The invention relates to water-soluble ionic cellulose derivatives and their use as additives for gypsum- and cement-containing compounds.Type: GrantFiled: January 27, 1993Date of Patent: October 25, 1994Assignee: Wolff Warlsrode AGInventors: Rene Kiesewetter, Klaus Szablikowski, Werner Lange
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Patent number: 5278304Abstract: The invention relates to water-soluble sulfoethyl cellulose ethers, more particularly methyl sulfoethyl cellulose ether (MSEC), of very high solution quality, to a process for its production and to the use of these products as thickeners, dispersants or binders.Type: GrantFiled: April 20, 1992Date of Patent: January 11, 1994Assignee: Bayer AktiengesellschaftInventors: Reinhard Kniewske, Rene Kiesewetter, Klaus Szablikowski
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Patent number: 5245024Abstract: This invention relates to an improved cellulose chromatography support and, in particular, to substantially spherical, high density cellulose particles. This invention also relates to a method of making these spherical, high density cellulose particles and, in particular, to a method for forming spherical cellulose from a high molecular weight viscose in a stable emulsion of a liquid carrier and emulsifying agents.Type: GrantFiled: December 30, 1991Date of Patent: September 14, 1993Assignee: Loyola University of ChicagoInventors: Ioannis Scarpa, Anita Beavins
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Patent number: 5196527Abstract: This invention relates to ion-exchanged fine cellulose particles, porous fine cellulose particles which can be advantageously used as an affinity carrier, and methods of production thereof. These fine particles of the invention have the advantage that they possess excellent pressure-resistant strength and can treat treatment liquors under pressure at a high flowing velocity. Thus, they can be advantageously used industrially in various separation and purification processes.Type: GrantFiled: February 4, 1992Date of Patent: March 23, 1993Assignee: Kanebo Ltd.Inventors: Shigeru Ookuma, Kouei Igarashi, Masami Hara, Kazuhiro Aso, Hideo Yoshidome, Hiroshi Nakayama, Keizo Suzuki, Kazuhiko Nakajima
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Patent number: 5182380Abstract: Water-soluble, reversibly gelable cellulose ethers containing sulphoethyl groups (DS-sulphoethyl) and dihydroxpropyl groups (MS-dihydroxypropyl).Type: GrantFiled: July 30, 1991Date of Patent: January 26, 1993Assignee: Wolff Walsrode AktiengesellschaftInventors: Jorn Breckwoldt, Klaus Szablikowski
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Patent number: 5177199Abstract: Water-soluble hydroxypropyl sulfoethyl cellulose derivatives having an average degree of substitution (DS) with sulfoethyl groups of <0.3 and a molar degree of substitution (MS) with hydroxypropyl or <2.Type: GrantFiled: November 15, 1991Date of Patent: January 5, 1993Assignee: Wolff Walsrode AktiengesellschaftInventors: Rene Kiesewetter, Klaus Szablikowski
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Patent number: 5093489Abstract: A modified cellulose and/or chitin for biocompatible dialysis membranes having a structure represented by the formula ##STR1## wherein Cell is cellulose or chitin, in each case without hydroxyl groups, s=3 in the case of cellulose and s=2 in the case of chitin, R' is CH.sub.3 and/or C.sub.2 H.sub.5 and/or C.sub.3 H.sub.7, X denotes specified functional groups, R" is H or R, Z corresponds to the following groups of atoms: SR", SO.sub.3 H and salts thereof, SO-R, SONR".sub.2, SO.sub.2 -R, SO.sub.2 NR".sub.2, SO.sub.2 H and salts thereof, F, Cl, Br, I, NR".sub.2, PR".sub.2, PO.sub.3 H.sub.2 and salts thereof, PO.sub.2 H(OR), PO(OR).sub.2, PO.sub.2 HR" and salts thereof, POR"(OR) and POR".sub.2, x+t=0.75 to 2.85, t=0 to 2.85, x=0 to 2.85, and z=0.01 to 0.45. A process for preparation of the cellulose and/or chitin derivatives is also disclosed.Type: GrantFiled: October 19, 1990Date of Patent: March 3, 1992Assignee: Akzo N.V.Inventor: Michael Diamantoglou
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Patent number: 5093488Abstract: A modified cellulose and/or chitin for biocompatible dialysis membranes having a structure represented by the formula ##STR1## wherein cell is cellulose or chitin, in each case without hydroxyl groups, s=3 in the case of cellulose and s=2 in the case of chitin, R' is CH.sub.3 and/or C.sub.2 H.sub.5 and/or C.sub.3 H.sub.7, X denotes specified functional groups, R" is H or R, R"' denotes R, x+t=0.75 to 2.85, t=0 to 2.85, x=0 to 2.85, and r=0 to 1. A process for preparation of the cellulose and/or chitin derivatives is also disclosed.Type: GrantFiled: October 19, 1990Date of Patent: March 3, 1992Assignee: Akzo N.V.Inventor: Michael Diamantoglou
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Patent number: 5093486Abstract: A modified cellulose and/or chitin for biocompatible dialysis membranes having a structure represented by the formula ##STR1## wherein cell is unmodified cellulose or chitin, in each case without hydroxyl groups, s=3 in the case of cellulose and s=2 in the case of chitin, R' is CH.sub.3 and/or C.sub.2 H.sub.5 and/or C.sub.3 H.sub.7, X denotes specified functional groups, m=0.75 to 2.85, and x=0.005 to 2.10. A process for preparation of the cellulose and/or chitin derivatives is also disclosed.Type: GrantFiled: October 19, 1990Date of Patent: March 3, 1992Assignee: Akzo N.V.Inventor: Michael Diamantoglou
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Patent number: 5008385Abstract: Cellulose derivatives are disclosed which have the following formula: ##STR1## wherein Z is selected from the group consisting of alkylene, alkenylene, alkynylene, cycloalkylene or benzylene or xylylene radicals, which may or may not be substituted;X is selected from the group consisting of --H, --NR.sub.2, --N.sup.+ R.sub.3, --CN, --COOH, --SO.sub.3 H, --SO.sub.3 H, --PO(OR).sub.2, CONR.sub.2 or --Si(OR).sub.3 ;R is selected from the group consisting of hydrogen, alkyl and alkenyl groups having from 1 to 25 carbon atoms, and cycloalkyl, tolyl and phenyl groups;Y is selected from the group consisting of alkyl, alkenyl, alkynyl groups having from 1 to 36 carbon atoms, which may or may not be substituted, cycloalkyl, phenyl, tolyl and benzyl groups, ##STR2## (--CH.dbd.CH--COOH), and NHR, where R has the same meaning as in X, andm=0 to 2.5n=0.01 to 2.95,with the provision that, when m=0, n.gtoreq.1.55, if Y is an alkyl radical with 1 to 5 carbon atoms, 3-(CH.sub.2).sub.Type: GrantFiled: July 15, 1988Date of Patent: April 16, 1991Assignee: Akzo N.V.Inventor: Michael Diamantoglou
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Patent number: 5001232Abstract: Improved water soluble carboxymethylsulphoethyl celluloses may be obtained by suspending cellulose, adding compounds which transfer sulphoalkyl and carboxymethyl and then etherifying after alkalization.Type: GrantFiled: December 9, 1988Date of Patent: March 19, 1991Assignee: Wolff Walsrode AGInventors: Dieter Herzog, Klaus Balser, Klaus Szablikowski
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Patent number: 4992538Abstract: Silated polysaccharides having 0.0005 to 2.0 silyl molar substitution per anhydrosaccharide unit form water resistant films when cast from aqueous solution and dried in the presence of atmospheric carbon dioxide. These films are soluble in aqueous caustic. A preferred water soluble polymer is a cellulose ether with 0.005 to 1.0 silyl substitution.Type: GrantFiled: June 5, 1989Date of Patent: February 12, 1991Assignee: Aqualon CompanyInventor: Arjun C. Sau
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Patent number: 4990609Abstract: Sulfoethyl cellulose prepared by addition of an alkylating agent and subsequent addition of alkali shows particularly valuable properties.Type: GrantFiled: December 9, 1988Date of Patent: February 5, 1991Assignee: Wolff Walsrode AGInventors: Dieter Herzog, Klaus Balser, Klaus Szablikowski
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Patent number: 4972007Abstract: Cellulose derivatives which are substituted in a specified manner by both carboxyalkyl groups and sulphoalkyl groups which are suitable in drilling fluids.Type: GrantFiled: December 9, 1988Date of Patent: November 20, 1990Assignee: Wolff Walsrode AGInventors: Dieter Herzog, Bernd Schriewer
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Patent number: 4822681Abstract: A chemically modified and activated, hydroxyl-group-containing, natural or synthetic, polymeric solid body surface is disclosed, as well as a process for the activation of such solid body surfaces by means of organo-silanes and, if necessary, homo- or heterobifunctional reagent. The surfaces are used for the stable, simple and economical binding of proteins, nucleic acids, low-molecular ligands, cells, microorganisms and other biological materials, in biology, biotechnology and medicine.Type: GrantFiled: January 29, 1987Date of Patent: April 18, 1989Assignee: Veb Leipziger ArzeimittelwerkInventors: Werner Schossler, Hans-Friedrich Boeden, Martin Holtzhauer, Fritz Loth, Falk Hiepe, Dieter Bertram, Frank Mielke, Reinhard Muller, Dagmar Konjuchowa
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Patent number: 4694077Abstract: Novel cellulose derivative, process for preparing the same and sulfur dioxide gas permselective membrane comprising said derivative.Hydrocarbysulfinylethyl cellulose represented by the formula (I): ##STR1## wherein, X may be the same or different and represents hydrogen atom or hydrocarbylsulfinylethyl group represented by the formula (II): ##STR2## wherein, R may be the same or different and represents an alkyl group having 1 to 6 carbon atoms or a phenyl group,with the average substitution degree with the hydrocarbylsulfinylethyl group of the formula (II) per glucose unit being at least 0.05, and sulfur dioxide gas permeation membrane comprising said cellulose derivative. This membrane is excellent in sulfur dioxide gas permselectivity.Type: GrantFiled: September 2, 1986Date of Patent: September 15, 1987Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Kiyokazu Imai, Tomoo Shiomi, Yasuyuki Tezuka
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Patent number: 4272526Abstract: The present invention relates to a chloral derivative having the general formula ##STR1## in which Y' is a polysaccharide consisting of a chain of anhydroglucose, modified anhydroglucose or uronic acid units as substituent group and in which R is selected from --H, --COCH.sub.2 OH, --[(CH.sub.2).sub.n 0].sub..chi. --H in which n is 2 to 5 and .chi. is 1 to 7; --CH.sub.2 OSO.sub.2 X' or --CH.sub.2 COOX' in which X' is NH.sub.4 or a single equivalent of a non-toxic metallic cation, --(CH.sub.2).sub.n H where n is 1 to 7, --(CH.sub.2).sub.n (OH).sub..chi. Y where Y is --H or --CH.sub.3 n is 1 to 7, .chi. is 1 to 12 and the --OH groups are attached to any or all of the carbon atoms by substitution and wherein when Y.sup.1 is a chain of unmodified anhydroglucose units, these units have the following configurations:.alpha.-D-glucopyranosyl units having a predominantly 1-4 linkage.beta.-D-glucopyranosyl units having a predominantly 1-4 linkage and/or.beta.Type: GrantFiled: May 8, 1979Date of Patent: June 9, 1981Assignee: Macarthys Pharmaceuticals LimitedInventors: David E. Simpkins, John B. O. Taylor
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Patent number: 4178439Abstract: The invention relates to a novel sulphated cationic ion exchanger and to a method for preparation thereof. In addition it relates to a method of improving the capacity of an exchange matrix to receive sulphated groups. Although the general attraction of sulphate groups to proteins is known we have found that sulphated ion exchangers selectively bind lipoproteins in blood serum or plasma under suitable conditions. We have also discovered that when hydroxyalkyl groups are introduced into the ion exchanger matrix its capacity for taking up sulphate groups is unexpectedly increased. A method of use of the ion exchanger is also described.Type: GrantFiled: March 1, 1977Date of Patent: December 11, 1979Assignee: Development Finance Corporation of New ZealandInventors: John S. Ayers, David R. Husbands
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Patent number: RE30459Abstract: A polysaccharide or polyvinyl alcohol containing a mixture of nitrite ester groups with sulfate or nitrate ester groups with the mixture of ester groups being substantially uniformly distributed among the polymer units of the polysaccharide or polyvinyl alcohol.A nitrite ester of a polysaccharide alcohol having a degree of substitution of less than about 2.0. A nitrite ester of polyvinyl alcohol having a degree of substitution of 1.0 or less.Type: GrantFiled: April 26, 1979Date of Patent: December 23, 1980Inventor: Richard G. Schweiger