Patents Examined by Everett White
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Patent number: 11939407Abstract: The present application discloses regioselectively substituted cellulose esters, films made from the regioselectively substituted cellulose esters and methods for making the same. The regioselectively substituted cellulose esters are synthesized using trifluoroacetic anhydride and cellulose with various acyl donors or acyl donor precursors.Type: GrantFiled: January 26, 2023Date of Patent: March 26, 2024Assignee: Eastman Chemical CompanyInventors: Casey Lynn Elkins, Robert Jacks Sharpe, Bin Wang
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Patent number: 11926714Abstract: The disclosure provides redispersible CNC. The CNC disclosed herein is redispersible in non-polar and polar organic solvents as well as polar and non-polar polymers such as polyethylene or polypropylene. The disclosure surprisingly also provides redispersible CNC bearing improved redispersion in aqueous systems and most particularly in high ionic strength aqueous systems which usually require significant mixing energy to achieve dispersion.Type: GrantFiled: May 15, 2018Date of Patent: March 12, 2024Assignee: CELLUFORCE INC.Inventors: Philippe Bourassa, Myriam Methot, Richard Berry
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Patent number: 11918966Abstract: The invention relates to a method for treating a nanofibrillar cellulose hydrogel, wherein the method comprises the steps of: providing a nanofibrillar cellulose hydrogel, wherein the nanofibrillar cellulose is oxidized nanofibrillar cellulose, wherein the oxidation has been carried out through N-oxyl mediated catalytic oxidation of cellulose-based raw material, and has at most 50 ?mol of aldehyde groups per gram of dry nanofibrillar cellulose; and subjecting the nanofibrillar cellulose hydrogel to a heat treatment.Type: GrantFiled: April 16, 2021Date of Patent: March 5, 2024Assignee: UPM-KYMMENE CORPORATIONInventor: Isko Kajanto
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Patent number: 11919974Abstract: Provided is an oxidized cellulose, a 13C solid-state NMR spectrum of the oxidized cellulose including a number of peaks in a range of from 165 ppm to 185 ppm, which can be produced by oxidizing a cellulose raw material with a hypochlorous acid or salt thereof having an available chlorine concentration of from 6% by mass to 14% by mass, while adjusting the pH in a range of from 5.0 to 14.0.Type: GrantFiled: August 2, 2019Date of Patent: March 5, 2024Assignee: TOAGOSEI CO., LTD.Inventors: Daisuke Kamiya, Shiroshi Matsuki, Jun Takada
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Patent number: 11905339Abstract: The invention relates to a method for producing a low-viscosity cellulose ether product, and to the use thereof.Type: GrantFiled: December 20, 2018Date of Patent: February 20, 2024Assignee: SE TYLOSE GMBH & CO. KGInventor: Mike Kleinert
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Patent number: 11905341Abstract: The present invention provides a process for producing a nanocellulose material, comprising: fractionating a lignocellulosic biomass feedstock in the presence of a solvent for lignin and water, but no acid catalyst, to generate cellulose-rich solids; and then mechanically treating the cellulose-rich solids to form a nanocellulose material comprising cellulose nanofibrils and/or cellulose nanocrystals. Many organic or inorganic solvents are possible. In some embodiments, the solvent for lignin is an oxygenated organic compound, such as a C1-C18 alcohol, e.g. ethanol, ethylene glycol, propanol, propanediol, glycerol, butanol, or butanediol. The solvent for lignin may be an aromatic alcohol, such as phenol, cresol, or benzyl alcohol. The solvent for lignin may be a ketone, an aldehyde, or an ether, such as methyl ethyl ketone or diethyl ether. The solvent for lignin may be a non-oxygenated alkane, olefin, or aromatic hydrocarbon. In some embodiments, the solvent for lignin is an ionic liquid.Type: GrantFiled: January 7, 2022Date of Patent: February 20, 2024Assignee: GranBio Intellectual Property Holdings, LLCInventors: Kimberly Nelson, Theodora Retsina, Vesa Pylkkanen, Ryan O'Connor
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Patent number: 11905340Abstract: Nanocellulose containing a sulfuric acid group and/or a sulfo group, each of which is derived from a sulfuric acid treatment, and an anionic functional group derived from a hydrophilization treatment. The total amount of the sulfuric acid group and/or the sulfo group and the anionic functional group is more than 0.1 mmol/g and not more than 4.0 mmol/g. Also disclosed is a product including a mixture containing the nanocellulose and a method for producing the nanocellulose.Type: GrantFiled: September 5, 2019Date of Patent: February 20, 2024Assignee: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Hideaki Nagahama, Yuuki Kinoshita, Toshiki Yamada
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Patent number: 11890344Abstract: The application of a highly controlled, micron-sized, branched, porous architecture to enhance the handling properties and degradation rate of hydrogels is described in the instant invention. A previously described pattern created through one-step nucleated crystallization in a hydrogel film creates tunable mechanical properties and/or chemical stability for use in tissue engineering applications. The bulk mechanical properties and the degradation rate of the material can be tuned easily by the addition or subtraction of crystalline structure or by the addition and subtraction of backfill material, making this useful for a variety of applications. Relevant mechanical properties that can be tuned through the application of this unique porosity are moduli, elasticity, tensile strength, and compression strength. The method of the present invention can be applied to biopolymers and natural materials as well as synthetic materials.Type: GrantFiled: February 11, 2022Date of Patent: February 6, 2024Assignee: Board of Regents, The University of Texas SystemInventors: Sarah Mayes, Christine Schmidt
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Patent number: 11884754Abstract: [Object] An object is to provide a sulfonated fine cellulose fiber having excellent transparency, a sulfonated pulp fiber suitable for the sulfonated fine cellulose fiber, a method for producing these fibers, and a derivative pulp containing the sulfonated pulp fiber. [Means for achieving the object] The sulfonated pulp fiber of the present invention is a pulp fiber comprising a plurality of cellulose fibers, wherein a part of hydroxyl groups of the cellulose fibers of the pulp fiber is substituted with sulfo groups, an introduction amount of sulfur attributable to the sulfo groups is adjusted to be higher than 0.42 mmol/g while maintaining a fiber shape, and a water retention value of the pulp fiber is adjusted to 150% or more. Since the sulfonated pulp fiber has a predetermined water retaining property or more while maintaining the fiber shape, the degree of flexibility in handling can be improved.Type: GrantFiled: April 24, 2019Date of Patent: January 30, 2024Assignees: MARUSUMI PAPER CO., LTD., NATIONAL UNIVERSITY CORPORATION EHIME UNIVERSITYInventors: Shou Hiasa, Hiromi Uchimura, Tomoki Yabutani
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Patent number: 11879022Abstract: There is provided a method for producing a depolymerized cellulose ether having yellowness reduced. More specifically, there is provided a method for producing a depolymerized cellulose ether comprising a depolymerization step of depolymerizing a cellulose ether with an aqueous solution of acid in the presence of a polyhydric alcohol having 2 to 6 carbon atoms.Type: GrantFiled: October 20, 2021Date of Patent: January 23, 2024Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Shinnosuke Inada, Taishi Kitaguchi, Akira Kitamura, Mitsuo Narita
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Patent number: 11878088Abstract: The invention includes chitosan nanofibers having enhanced structural integrity, compositions comprising such chitosan nanofibers, and related methods of use. In a particular aspect, electrospun chitosan nanofibers can be reversibly acylated to enhance structural integrity and promote healing and the formation of tissues in a subject. In another aspect, electrospun chitosan nanofibers comprising at least a portion of the amino groups protected, such as through N-tert-butoxycarbonyl groups, demonstrate enhanced structural integrity and promote healing and the formation of tissues in a subject. The invention also includes compositions and methods for producing a modified chitosan material having anti-inflammatory and pro-healing characteristics and methods of using the modified chitosan materials in a film, a gel, a membrane, microfibers, nanofibers, nano- or micro-particles/spheres and/or sponges. In some aspects, microspheres and methods of producing microspheres comprising modified chitosan are included.Type: GrantFiled: December 1, 2021Date of Patent: January 23, 2024Assignee: The University of Memphis Research FoundationInventors: Joel D. Bumgardner, Hengjie Su, Tomoko Fujiwara, Daniel G. Abebe, Kwei-Yu Liu
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Patent number: 11872244Abstract: A method of treatment includes agitating a thixotropic oxidized cellulose solution; administering the agitated thixotropic oxidized cellulose solution to a target tissue site; and allowing the agitated thixotropic oxidized cellulose solution to gel at the target tissue site.Type: GrantFiled: July 31, 2019Date of Patent: January 16, 2024Assignee: Covidien LPInventors: Rachit Ohri, Phillip D. Blaskovich, Min-Shyan Sheu, Petra Brockfeld
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Patent number: 11873350Abstract: A process for dissolving modified cellulose is disclosed. The process includes contacting modified cellulose with a solvent in a mixture to form swelled modified cellulose and then contacting the mixture with a salt to dissolve the swelled modified cellulose.Type: GrantFiled: April 19, 2021Date of Patent: January 16, 2024Assignee: Covidien LPInventors: Valentino J. Tramontano, Joshua Kennedy, Philip D. Blaskovich, Rachit Ohri, Daniel S. Costa, Sajida Farooqi
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Patent number: 11873351Abstract: There is provided a method for producing hydroxypropyl methyl cellulose phthalate (HPMCP), including an esterification step of reacting hydroxypropyl methyl cellulose with a carboxybenzoylating agent in the presence of an aliphatic carboxylic acid in a kneader reactor equipped with two or more stirring blades rotating around their own axes and orbitally revolving, to obtain a reaction product solution containing HPMCP; a precipitation step of precipitating the HPMCP by mixing the reaction product solution with water to obtain a suspension of the precipitated HPMCP; and a washing and recovery step of washing the HPMCP in the suspension and recovering the washed HPMCP. Further, there is provided HPMCP having yellowness at 20° C. of 10.0 or less, as determined in a 10% by mass solution of the HPMCP in acetone.Type: GrantFiled: October 29, 2020Date of Patent: January 16, 2024Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Taishi Kitaguchi, Junichi Matsubara, Mitsuhiro Yoshida
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Patent number: 11845810Abstract: A silicon glycan is provided. The silicon glycan comprises a glycoside moiety, independently selected organosilicon moieties, and beta-amino alcohol moieties joining the organosilicon moieties to the glycoside moiety. The glycoside moiety comprises independently selected saccharide moieties, which may be substituted with hydrocarbyl groups, ether moieties, and/or amine moieties. A method of preparing the silicon glycan is also provided. The method includes reacting (A) an aminoethyl polysaccharide and (B) an epoxide-functional organosilicon compound, to give the silicon glycan. The method may include preparing the aminoethyl polysaccharide (A) by first reacting (At) a hydroxyl-functional polysaccharide and (A2) an aziridinium halide compound to give the aminoethyl polysaccharide (A).Type: GrantFiled: December 26, 2019Date of Patent: December 19, 2023Assignees: DOW SILICONES CORPORATION, DOW GLOBAL TECHNOLOGIES LLCInventors: Marc-Andre Courtemanche, Michael Salvatore Ferritto, Emmett Partain, Wendy Xu
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Patent number: 11840583Abstract: The present application relates to cellulose nanocrystals and other anionic carbohydrates and methods of preparation thereof. Specifically, in certain embodiments, the cellulose nanocrystals are modified using ion exchange technology to yield thermally stable or task-specific, dispersible cellulose nanocrystals.Type: GrantFiled: April 22, 2021Date of Patent: December 12, 2023Assignee: AMERICAN UNIVERSITYInventor: Douglas Fox
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Patent number: 11834524Abstract: The application discloses a method for preparing chitin highly dispersible in aqueous phase and prepared chitin. After chitin is ground, dissolved, modified with glycidol and purified, a final product glycidol chitin is obtained. The glycidol chitin prepared according to this method has good solubility in purified water, and the concentration can reach 100 mg/mL, which is obviously different from common insoluble or poorly soluble chitin derivatives. Glycidol chitin may have a wide range of application prospects in biomedicine, cosmetics, absorbable materials, and other related aspects.Type: GrantFiled: May 31, 2022Date of Patent: December 5, 2023Assignee: Hangzhou Singclean Medical Products Co., LtdInventors: Jue Wang, Yaru Wu, Meiqin Zhu
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Patent number: 11833450Abstract: A method of recovering a bead support from an emulsion includes supplying an aqueous surfactant solution into a centrifuge tube; supplying a hydrophobic liquid over the surfactant solution in the centrifuge tube, wherein a ratio of the volume of the aqueous surfactant solution to the volume of the hydrophobic liquid is not greater than 0.5; and applying an emulsion over the hydrophobic liquid while centrifuging, the emulsion comprising a dispersed aqueous phase including the bead support, the emulsion breaking and material of the dispersed phase preferentially partitioning to the surfactant solution.Type: GrantFiled: December 30, 2021Date of Patent: December 5, 2023Assignee: Life Technologies CorporationInventors: Brian Reed, James A. Ball
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Patent number: 11834560Abstract: The present invention relates to a water degradable film comprising hyaluronic acid or a salt thereof and polyphenol compounds. The film of the present invention can transcribe nanofilms in the form of CNT (carbon nanotube), graphene and magnetic particles to various places. The film of the present invention can be dissolved by an aqueous solution or body fluid, and can be effectively used in the medical field since it is non-toxic and biocompatible. The film of the present invention can also be effectively used as a transcript that does not degrade the quality and performance of the device because no residue remains in the electronic device and the existing photolithography process.Type: GrantFiled: July 21, 2020Date of Patent: December 5, 2023Assignee: Korea Research Institute of Chemical TechnologyInventors: Jae-Hyeok Lee, Sun-Hyun Park, Ki-Suk Kim
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Patent number: 11813350Abstract: The invention relates to a composition comprising, as dermatological active principle, at least one polysaccharide consisting of a glucose and trehalose heteropolymer and a branched hydrogenated glucose homopolymer comprising ? (1-4) and ? (1-6) bonds), for use in the treatment of rosacea and/or telangiectasia.Type: GrantFiled: November 8, 2021Date of Patent: November 14, 2023Assignees: NAOS INSTITUTE OF LIFE SCIENCEInventor: Jean-Noël Thorel