Patents Examined by Everett White
  • Patent number: 10968284
    Abstract: The present invention is a multilayered composite comprising porous metal oxide particles that are covalently bonded by way of inorganic ether groups to one or more sites of a first polyhydroxyl-functionalized polymer. This first polymer is in turn covalently bonded by way of inorganic ether groups to one or more sites of a second polyhydroxyl-functionalized polymer. The multilayered composites can be prepared by contacting porous inorganic-oxide particles with a sufficient amount of OH-reactive crosslinking agent to form metal oxide particles imbibed with the crosslinking agent, and then contacting the inorganic-oxide particles with a solution of polyhydroxyl-functionalized polymer under reactive conditions.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: April 6, 2021
    Assignees: The Regents of the University of California, Dow Global Technologies LLC, Rohm and Haas Company
    Inventors: Joseph Jankolovits, Alexander S. Katz, Oz M. Gazit, James C. Bohling, John A. Roper, III
  • Patent number: 10968283
    Abstract: A method for producing functionalized nanocrystalline cellulose, the method comprising the steps of providing cellulose, mixing said cellulose with a peroxide, thereby producing a reaction mixture, and heating the reaction mixture, and/or exposing the reaction mixture to UV radiation is provided. Functionalized nanocrystalline cellulose produced by this method is also provided.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: April 6, 2021
    Assignee: Anomera Inc.
    Inventors: Mark P. Andrews, Timothy Morse
  • Patent number: 10961323
    Abstract: Provided is a method for producing HPMCP capable of reducing the average particle size of HPMCP particles to an intended range without a pulverization step. Specifically provided is a method for producing hypromellose phthalate, comprising an esterification step of reacting hypromellose with an esterification agent in the presence of a catalyst to obtain a reaction solution containing crude hypromellose phthalate, a precipitation step of mixing the reaction solution with water to precipitate the crude hypromellose phthalate, thereby obtaining a hypromellose phthalate suspension, a liquid removal step of removing a liquid from the hypromellose phthalate suspension with a centrifugal decanter to obtain liquid-removed hypromellose phthalate, and a drying step of drying the liquid-removed hypromellose phthalate.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: March 30, 2021
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Mitsuhiro Yoshida, Junichi Matsubara
  • Patent number: 10954314
    Abstract: A method of disintegrating pulp for use in cellulose acetate production includes: a primary disintegration step of disintegrating a pulp sheet into pulp pieces having an average area of not more than 45 cm2; and a secondary disintegration step of disintegrating the pulp pieces with an impact shock exerted by a jet mill (20). The jet mill (20) includes: a cylindrical casing (21) provided with an inlet (21d) and an outlet (21e); and a rotor (25) including a plurality of blades (25a) provided on its outer peripheral portion, the plurality of blades (25a) facing an inner peripheral surface of the casing (21).
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: March 23, 2021
    Assignee: DAICEL CORPORATION
    Inventors: Mitsuteru Hosaka, Toshinori Okano, Yuji Ida
  • Patent number: 10934367
    Abstract: Provided is a method for producing HPMCAS capable of reducing the average particle size of HPMCAS particles to an intended range without a pulverization step. Specifically provided is a method for producing hypromellose acetate succinate, comprising an esterification step of reacting hypromellose with an esterification agent in the presence of a catalyst to obtain a reaction solution containing crude hypromellose acetate succinate, a precipitation step of mixing the reaction solution with water to precipitate the crude hypromellose acetate succinate, thereby obtaining a hypromellose acetate succinate suspension, a liquid removal step of removing a liquid from the hypromellose acetate succinate suspension with a centrifugal decanter to obtain liquid-removed hypromellose acetate succinate, and a drying step of drying the liquid-removed hypromellose acetate succinate.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: March 2, 2021
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Mitsuhiro Yoshida, Junichi Matsubara, Kazuki Kikuchi
  • Patent number: 10906992
    Abstract: There is provided a method for producing a low polymerization degree cellulose ether having a less yellowish appearance and having excellent long-term storage stability through depolymerization of a high polymerization degree cellulose ether with an acid and without requiring an additive other than the acid. More specifically, there is provided a method for producing a low polymerization degree cellulose ether, including a step of depolymerizing a high polymerization degree cellulose ether with an acid to obtain a low polymerization degree cellulose ether mixture and a step of neutralizing the acid present in the low polymerization degree cellulose ether mixture, wherein ultraviolet is applied in the step of depolymerizing or between the steps of depolymerizing and neutralizing.
    Type: Grant
    Filed: October 5, 2017
    Date of Patent: February 2, 2021
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Taishi Kitaguchi, Akira Kitamura, Shintaro Matsusue, Mitsuhiro Yoshida
  • Patent number: 10889916
    Abstract: Provided are a cellulose acetate fiber and a cellulose acetate fiber molded article which are excellent in water solubility and biodegradability and are small in load onto the natural environment even when allowed to stand still in the environment. The invention provides a cellulose acetate fiber containing cellulose acetate having a total degree of acetyl substitution of 0.4 to 1.3 and a compositional distribution index (CDI) of 2.0 or less as well as a cellulose acetate fiber molded article.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: January 12, 2021
    Assignee: DAICEL CORPORATION
    Inventors: Shu Shimamoto, Shizuka Okada, Hiroki Taniguchi, Toshikazu Nakamura
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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