Patents Examined by Everett White
  • Method for producing alkyl cellulose
    Patent number: 10881124
    Abstract: Provided is a method for producing an alkyl cellulose having a high viscosity and not having an excessively high gel strength. More specifically, there is provided a method for producing an alkyl cellulose comprising the steps of: mixing a cellulose pulp with a first alkali metal hydroxide solution with stirring to obtain alkali cellulose; reacting the alkali cellulose with an alkylating agent to obtain a first reaction mixture; blending a second alkali metal hydroxide solution with the first reaction mixture with stirring, without further blending of the alkylating agent, to obtain a second reaction mixture; and purifying the second reaction mixture to obtain an alkyl cellulose. There is also provided an alkyl cellulose being produced by the above method and having a degree of substitution of alkyl group of 27 to 33% by weight.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: January 5, 2021
    Assignees: Shin-Etsu Chemical Co., Ltd., SE Tylose GmbH & Co. KG
    Inventors: Akira Kitamura, Atsushi Yamamoto, Mitsuo Narita, Heiko Nebel, Andreas Schultz
  • Cellulose acetate powder and method of producing cellulose acetate powder
    Patent number: 10875932
    Abstract: Provided is a cellulose acetate powder that makes it possible to reduce the formation of spotty patches on a formed article of the cellulose acetate and prevent lowering of the production process passability of the formed article. A cellulose acetate powder includes cellulose acetate having an acetylation degree of 53 to 56% and a 6% viscosity of 30 to 200 mPa·s. In the cellulose acetate powder, a cumulative pore volume is not less than 0.200 ml/g; a proportion of particles having a particle diameter of not less than 500 ?m is not higher than 40%; and an angle of repose is not greater than 51°.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: December 29, 2020
    Assignee: DAICEL CORPORATION
    Inventors: Akihiro Higuchi, Takehiro Matsumoto
  • Polysaccharide derivatives and cross-metathesis processes for preparing them
    Patent number: 10851179
    Abstract: Methods for the cross-metathesis of polysaccharides with one or more olefin-terminated side chains and cross-metathesized products are described. In an exemplary embodiment, a method for the synthesis of cellulose ?-carboxyesters via olefin cross-metathesis with acrylates is described. Conditions of the reactions were relatively mild and the olefin-substituted polysaccharides and the appropriate acrylate partners appear to follow Grubbs rules as summarized herein. Additionally, a method of hydrogenation of the cross-metathesized product is described. The compounds and methods may be useful for waterborne coating applications, adhesives, lubricants, or any product in need of dispersion in an aqueous media.
    Type: Grant
    Filed: March 16, 2015
    Date of Patent: December 1, 2020
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Kevin J. Edgar, Xiangtao Meng, Yifan Dong
  • Separating agent for optical isomer
    Patent number: 10836834
    Abstract: Provided is a complex obtained by reacting a polymer compound derivative obtained by modifying part of the hydroxy groups or amino groups of a polymer compound having the hydroxy groups or amino groups with a compound represented by the following general formula (I) with one or more kinds of compounds represented by the following general formulae (II) to (V): (I) A-X—Si(Y)nR3-n; (II) M(OR1)nR24-n; (III) Al(OR1)pR23-p; (IV) Mg(OR1)qR22-q; and (V) [Si(OR3)nR43-n]—(X)—[Si(OR5)nR63-n].
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: November 17, 2020
    Assignee: DAICEL CORPORATION
    Inventors: Yoshio Okamoto, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
  • Method for preparing a cellulose sponge
    Patent number: 10815313
    Abstract: A method for preparing a cellulose sponge, comprising: (A) providing a solution of hydroxypropyl cellulose having a self-crosslinkable substituent; and (B) adding an initiator and a catalyst into the solution of hydroxypropyl cellulose having the self-crosslinkable substituent for crosslinking, wherein a method for preparing the hydroxypropyl cellulose having the self-crosslinkable substituent comprises: (a) dissolving hydroxypropyl cellulose in dimethylformamide to form a hydroxypropyl cellulose solution; (b) dissolving a compound comprising the self-crosslinkable substituent in dimethylformamide and slowly adding it drop by drop into the hydroxypropyl cellulose solution; (c) adding an alcohol for reaction; and (d) reacting and drying at room temperature to form the hydroxypropyl cellulose having the self-crosslinkable substituent.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: October 27, 2020
    Assignee: SHANXI PISHON BIOMEDICAL TECHNOLOGY CO., LTD
    Inventor: Sheng-Tung Wen
  • Method for catalytic oxidation of cellulose and method for making a cellulose product
    Patent number: 10767307
    Abstract: A method for catalytic oxidation of cellulose using a heterocyclic nitroxyl radical as catalyst, main oxidant acting as oxygen source, and an activator of the heterocyclic nitroxyl radical, comprises—a preliminary activation step of the heterocyclic nitroxyl radical with hypochlorite to activated catalyst, and after the preliminary activation step, a cellulose oxidation step using the activated catalyst and hypochlorite as the main oxidant to oxidize cellulose. In the cellulose oxidation step, fibrous starting material is subjected to the oxidation to oxidize the cellulose, whereafter the oxidized fibrous raw material is disintegrated to nanofibrillar cellulose (NFC).
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: September 8, 2020
    Assignee: UPM-KYMMENE, CORPORATION
    Inventors: Timo Pääkkönen, Tapani Vuorinen, Markus Nuopponen
  • Regioselectively substituted cellulose esters and films made therefrom
    Patent number: 10759872
    Abstract: Regioselectively substituted cellulose esters having a plurality of pivaloyl substituents and a plurality of aryl-acyl substituents are disclosed along with methods for making the same. Such cellulose esters may be suitable for use in films, such as +A optical films, and/or +C optical films. Optical films prepared employing such cellulose esters have a variety of commercial applications, such as, for example, as compensation films in liquid crystal displays and/or waveplates in creating circular polarized light used in 3-D technology.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: September 1, 2020
    Assignee: Eastman Chemical Company
    Inventors: Matthew Allen Boone, Christopher Harlan Burk, Peter Borden Mackenzie, Jennifer A. Fish, Eduardo Gallas Cervo, Elaine Beatrice Mackenzie, Robert Joseph Maleski, Wesley McConnell, David William Norman, Tabatha Stearns, Bin Wang
  • Method of crosslinking of polysaccharides using photoremovable protecting groups
    Patent number: 10759878
    Abstract: The invention discloses a method of preparation of crosslinked materials based on polysaccharides using electromagnetic radiation in an aqueous solution containing a polysaccharide with a bound carbamate photoremovable protecting group (PPG with group —NH—CO—O—) and a polysaccharide containing an aldehyde group —CHO. The crosslinking process itself is carried out by means of a condensation reaction of the photochemically released amino group (—NH2) with the aldehyde group (—CHO) forming a bond of imine type (—N?CH—). Both processes proceed simultaneously and they can be performed under physiological conditions. The advantage of the suggested solution is the temporal and spatial control of crosslinking that allows the preparation of advanced materials for tissue engineering where the crosslink density and thus the mechanical properties in the material structure can be tailored.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: September 1, 2020
    Assignee: Contipro a.s.
    Inventors: Tomas Bobula, Radovan Buffa, Pavlina Prochazkova, Vladimir Velebny
  • Oxidation of alkanes to alcohols
    Patent number: 10745340
    Abstract: The invention provides processes and materials for the efficient and cost-effective functionalization of alkanes, such as methane from natural gas, to provide esters, alcohols, and other compounds. The method can be used to produce liquid fuels such as methanol from a natural gas methane-containing feedstock. The soft oxidizing electrophile, a compound of a main group, post-transitional element such as Tl, Pb, Bi, and I, that reacts to activate the alkane C—H bond can be regenerated using inexpensive regenerants such as hydrogen peroxide, oxygen, halogens, nitric acid, etc. Main group compounds useful for carrying out this reaction includes haloacetate salts of metals having a pair of available oxidation states, such as Tl, Pb, Bi, and I.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: August 18, 2020
    Assignee: The Scripps Research Institute
    Inventors: Roy A Periana, Brian G Hashiguchi, Michael M Konnick, Steven M Bischof
  • Method of producing purified stilbene compounds
    Patent number: 10730815
    Abstract: The present invention is directed to provide a precipitate obtained by adding ?-cyclodextrin to a liquid containing a stilbene compound. The precipitate according to the present invention is used as the precipitate obtained by adding ?-cyclodextrin to the liquid containing a stilbene compound.
    Type: Grant
    Filed: October 16, 2015
    Date of Patent: August 4, 2020
    Assignee: MORINAGA & CO., LTD.
    Inventors: Masahiro Umehara, Ikuko Kurita, Koji Yanae, Masahiko Sai
  • Process for producing a water-soluble cellulose derivative having a reduced content of water-insoluble particles
    Patent number: 10730956
    Abstract: A process for producing a water-soluble cellulose derivative of a reduced content of water-insoluble particles comprises the steps of a) reacting cellulose with an alkaline material to produce alkali cellulose, b) reacting the produced alkali cellulose with one or more derivatizing agents to produce a water-soluble cellulose derivative, c) washing the produced cellulose derivative with an aqueous liquid once or several times to provide a moist cellulose derivative having a water content of 25 to 85 percent, based on the total weight of the moist cellulose derivative, d) subjecting the moist cellulose derivative to homogenization to form the moist cellulose derivative to a paste, and e) pressing the paste through a filter of a pore size of up to 200 ?m.
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: August 4, 2020
    Assignee: Dow Global Technologies LLC
    Inventors: Roland Bayer, Oliver Petermann
  • Method for producing cellulose ether
    Patent number: 10723808
    Abstract: Provided is a method for producing a cellulose ether including a drying step capable of continuously and stably drying a highly adhesive wet cellulose ether with high thermal efficiency without causing adhesive growth and solidification of the wet cellulose ether in a dryer. More specifically, the method for producing a cellulose ether includes a step of drying a wet cellulose ether having water content of more than 50% by weight in a rotary type through-flow dryer.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: July 28, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventor: Mitsuhiro Yoshida
  • Nanocellulose
    Patent number: 10704197
    Abstract: A nanocellulose material of plant origin comprising nanocellulose particles or fibres derived from a plant material having a hemicellulose content of 30% or higher (w/w) (calculated as a weight percentage of the lignocellulosic components of the material). The nanocellulose may have an aspect ratio of greater than 250. The nanocellulose may be derived from plant materials having C4 leaf morphology. The plant material may be obtained from arid Spinifex. The nanocellulose can be made using mild processing conditions.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: July 7, 2020
    Assignee: The University of Queensland
    Inventors: Darren James Martin, Pratheep Kumar Annamalai, Nasim Amiralian
  • Cellulose ethers with temporary cross-links, a process to make them, and their use
    Patent number: 10618980
    Abstract: The invention relates to temporary cross-linked cellulose ethers, a process to make them, as well as their use to influence the rheological profile of an aqueous medium in which they are dissolved. The temporary cross-linked cellulose ethers are characterized in that they are cellulose ethers that are Cross-linked with at least one or more compounds of the formula (C1-4 alkyl)-OC(O)CHOHO—(C1-4 alkyl).
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: April 14, 2020
    Assignee: NOURYON CHEMICALS INTERNATIONAL B.V.
    Inventor: Hans Jonas Karlsson
  • Di- or tristyrylphenol monogycidyl ether adduct of maltodextrin
    Patent number: 10604590
    Abstract: The present invention relates to a compound which is a di- and/or a tristyrylphenol monoglycidyl ether adduct of the compound of Formula I: where m is from 1 to 60. The compound of the present invention is useful as an open time additive in coatings formulations.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: March 31, 2020
    Assignees: Dow Global Technologies LLC, Rohm and Haas Company
    Inventors: David J. Brennan, Gregoire Cardoen, Jonathan DeRocher, Robert E. Hefner, Jr., Antony K. Van Dyk, Tianlan Zhang
  • System and method for emulsion breaking
    Patent number: 10576396
    Abstract: 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: Grant
    Filed: December 12, 2016
    Date of Patent: March 3, 2020
    Assignee: LIFE TECHNOLOGIES CORPORATION
    Inventors: Brian Reed, James A. Ball
  • Hydroxypropyl methyl cellulose having high thermal gel strength, method for producing the same, and food containing the same
    Patent number: 10570217
    Abstract: Hydroxypropyl methyl cellulose having a high thermal gel strength even at a low viscosity is provided and utilized. Specifically provided is hydroxypropyl methyl cellulose having such properties that a 2% by weight aqueous solution of the hydroxypropyl methyl cellulose has a viscosity at 20° C. of 300 to 2,000 mPa·s and a storage elastic modulus at 85° C. of 2,000 to 4,500 mPa. Also provided is a food comprising the hydroxypropyl methyl cellulose. Further provided is a method for producing the hydroxypropyl methyl cellulose, the method comprising a step of depolymerizing, with an acid, high-viscosity hydroxypropyl methyl cellulose having such a property that a 2% by weight aqueous solution of the high-viscosity hydroxypropyl methyl cellulose has a viscosity at 20° C. of 70,000 to 100,000 mPa·s to obtain the hydroxypropyl methyl cellulose.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: February 25, 2020
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Tatsuya Yamashita, Akira Kitamura, Atsushi Yamamoto, Mitsuo Narita
  • Method for preparing hydroxypropyl methylcellulose acetate succinate (HPMCAS) grains having controlled grain size distribution, and HPMCAS powder
    Patent number: 10562983
    Abstract: Disclosed are a method for preparing hydroxypropyl methylcellulose acetate succinate (HPMCAS) grains and HPMCAS grains. The disclosed method for preparing HPMCAS grains comprises: a step of esterifying hydroxypropyl methylcellulose (HPMC), acetic anhydride, and succinic anhydride in a reaction medium in the presence of a catalyst so as to obtain a reaction solution containing HPMCAS (esterification step); and a step of continuously or intermittently putting the reaction solution into water so as to form grains (granulating step).
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: February 18, 2020
    Assignee: LOTTE FINE CHEMICAL CO., LTD.
    Inventors: Sung Hwan Bang, Ju Hee Shin, Jin Ryul Son, Kyung Yeol Park, Jeong Hee Chun, Ji Seon Jeong, Sang Youb Lee
  • Hydroxyalkyl alkyl cellulose, method for producing the same, and solid preparation
    Patent number: 10550202
    Abstract: There is provided is a hydroxyalkyl alkyl cellulose exhibiting good flowability and high compressibility. More specifically, provided are a hydroxyalkyl alkyl cellulose having a volume-based average particle diameter, determined by dry laser diffractometry, of 50 to 100 ?m, and having, on a basis of a dynamic image analysis to divide all particles into fine particles, spherical particles and fibrous particles, a volume fraction of the fibrous particles consisting of long and short fibrous particles relative to all of the particles of 45 to 70%, and a volume fraction of the fine particles relative to all of the particles of less than 2.0%; a solid preparation including the hydroxyalkyl alkyl cellulose; and others.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: February 4, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takuya Yokosawa, Taishi Kitaguchi, Yasuyuki Hirama, Akira Kitamura
  • Binder
    Patent number: 10508172
    Abstract: The present invention relates to binder compositions with an improved amine component, and a method of manufacturing a collection of matter bound by said binder compositions.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: December 17, 2019
    Assignees: Knauf Insulation, Inc., Knauf Insulation SPRL
    Inventor: Benedicte Pacorel