Patents Examined by Ana M. Fortuna
  • Patent number: 11369925
    Abstract: The present invention addresses the problem of providing: a composite hollow-fiber membrane having high permeability and high membrane strength; and a production method therefor. The present invention pertains to a composite hollow-fiber membrane that at least has a layer (A) and a layer (B), wherein the layer (A) contains a thermoplastic resin, the layer (A) is provided with a co-continuous structure comprising voids and a phase containing the thermoplastic resin, the co-continuous structure has a structural cycle of 1-1000 nm, and the hole area rate HA of the layer (A) and the hole area rate HB of the layer (B) fulfill the relation: HA<HB.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: June 28, 2022
    Inventors: Koichi Takada, Gohei Yamamura, Hiroki Eimura
  • Patent number: 11339071
    Abstract: An apparatus, method and system is provided for treating sewage sludge by dewatering the sewage sludge, heating the sewage sludge being treated to destroy pathogens, and then reducing volatile solids in the sewage sludge being treated through biochemical decomposition to produce a treated biosolids product that meets government regulations for pathogen reduction and vector attraction reduction.
    Type: Grant
    Filed: May 3, 2019
    Date of Patent: May 24, 2022
    Assignee: RDP Technologies, Inc.
    Inventor: Richard W. Christy
  • Patent number: 11325074
    Abstract: The present invention provides a porous membrane for water treatment, comprising: a high molecular weight polyethylene, a water-soluble polymer and an antioxidant, the high molecular weight polyethylene having an average molecular weight of 1.0×105 to 10.0×106 and a density of 0.940 to 0.976 g/cm3; wherein, the weight of the water-soluble polymer is 5 to 50 parts, the weight of the antioxidant is 0.1 to 10 parts, based on 100 parts of the weight of the high molecular weight polyethylene. The porous membrane for water treatment prepared by the present invention has a thickness of 5 to 30 ?m, a pore size of 10 to 100 nm, a porosity of 20 to 60%, and a surface contact angle of 30° to 95°. The porous membrane according to the present invention has good durability, simple preparation process, and relatively thin thickness, a uniform pore size distribution and small pore size, good hydrophilicity, as well as good filtration and adsorption effect.
    Type: Grant
    Filed: May 21, 2018
    Date of Patent: May 10, 2022
    Assignee: Shanghai Energy New Materials Technology Co., Ltd.
    Inventors: Alex Cheng, Lei Xiong
  • Patent number: 11325077
    Abstract: A composite membrane including carbide-derived carbon (CDC) particles deposited onto a surface of an intermediate layer which is supported on a porous polysulfone substrate. The intermediate layer contains reacted units of a polyfunctional acyl halide (e.g. trimesoyl chloride) and polydopamine. Methods of making the composite membrane via techniques such as filtration-assisted deposition of CDC particles and interfacial polymerization are specified. Water flux and oil rejection (e.g. diesel) performances of the composite membrane are evaluated. A method of separating an organic compound, such as hydrocarbons, from an aqueous sample utilizing the membrane is also provided.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: May 10, 2022
    Inventor: Isam Hassan Aljundi
  • Patent number: 11318418
    Abstract: Provided herein is forward osmosis-based water purification process, that includes contacting a solution of a soluble draw agent with a dehydrated insoluble draw agent, separating the now hydrated insoluble draw agent from the now concentrated draw solution, and exerting a stimulus on the hydrated insoluble draw agent for extracting water therefrom, thereby regenerating a dehydrated insoluble draw agent, wherein the osmotic concentration (osmolality) of the insoluble draw agent is greater than the osmotic concentration of the diluted draw solution, and the insoluble draw agent is impermeable to the soluble draw agent.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: May 3, 2022
    Assignee: Technion Research & Development Foundation Limited
    Inventors: Alexander Kraytsberg, Yair Ein-Eli
  • Patent number: 11311656
    Abstract: A modular assembly for a portable hemodialysis system may include a dialysis unit, e.g., that contains suitable components for performing hemodialysis, such as a dialyzer, one or more pumps to circulate blood through the dialyzer, a source of dialysate, and one or more pumps to circulate the dialysate through the dialyzer, and a power unit having a housing that contains suitable components for providing operating power to the pumps of the dialysis unit. The power unit may be selectively connected to the dialysis unit and provide power (e.g., pneumatic power in the form of pressure and/or vacuum) to the dialysis unit for the pumps when connected to the dialysis unit, but may be incapable of providing power to the dialysis unit when disconnected from the dialysis unit. The dialysis unit and the power unit are sized and weighted to each be carried by hand by a human.
    Type: Grant
    Filed: October 7, 2019
    Date of Patent: April 26, 2022
    Assignee: DEKA Products Limited Partnership
    Inventors: Dean Kamen, Jason A. Demers, Michael J. Wilt, Kevin L. Grant, Shannon Prescott, David E. Collins
  • Patent number: 11291956
    Abstract: The hollow fiber membrane module contains a hollow fiber membrane bundle having bundled hollow fiber membranes, a housing with an internal space formed in which the hollow fiber membrane bundle is housed and a gas supply portion which disperses cleaning gas for the hollow fiber membrane in the internal space. The internal space has an upper space in which an upper-side part of the hollow fiber membrane is positioned and a lower space in which a lower-side part of the hollow fiber membrane is positioned. The gas supply portion is provided with pipe vent holes which disperse gas in the housing at a position in the upper space and diffusing vent holes which disperse gas in the housing at a position below the lower space.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: April 5, 2022
    Assignee: Kuraray Co., Ltd.
    Inventors: Hiroki Nakanishi, Koji Miyake, Kazuma Inoue
  • Patent number: 11285442
    Abstract: The invention relates to a self-supporting highly moisture-permeable heat-insulating aerogel film and a preparation method thereof. The aerogel film is a self-supporting single-layer film with a SiO2 porous skeleton structure, having a thickness of 150 ?m to 300 ?m, which increases an exchange rate of vapor by 50% to 200%, and reduces a heat conductivity coefficient by 50% to 90%. The preparation method includes the following steps: (1) preparation of a template; (2) hydrolysis of nano-cellulose; (3) preparation of an aerogel film; and (4) post-treatment of the aerogel film.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: March 29, 2022
    Inventors: Lizhi Zhang, Qianwen Su
  • Patent number: 11279640
    Abstract: A wastewater treatment device has: an ozone generator which supplies ozone; a mixer which mixes ozone supplied from the ozone generator with wastewater and supplies ozone mixed wastewater; an ozone oxidation unit which progresses ozone oxidation in the ozone mixed wastewater while passing the ozone mixed wastewater therethrough and discharges wastewater in which the ozone has been consumed; a biological treatment unit which performs biological treatment on the wastewater discharged from the ozone oxidation unit using microorganisms; and an adjusting device which adjusts the amount of ozone to be mixed with the wastewater by the mixer so that ozone in an amount that inhibits the microorganisms of the biological treatment unit does not remain in the wastewater discharged from the ozone oxidation unit.
    Type: Grant
    Filed: March 13, 2020
    Date of Patent: March 22, 2022
    Inventors: Nobuhiko Kubota, Yuka Yoshida, Xia Huang, Chun Liu, Jing Zhang, Hong Zheng Zhou, Xiao Xuan Chen, Lei Zhang
  • Patent number: 11278827
    Abstract: Methods of filtering a liquid feed are disclosed. In one version, the method comprises passing a liquid feed through a single pass tangential flow filtration (SPTFF) system and recovering the retentate and permeate from the system in separate containers without recirculation through the SPTFF system. In another version, the method of filtering a liquid feed, comprises passing a liquid feed through a tangential flow filtration (TFF) system, recovering permeate and a portion of the retentate from the system in separate containers without recirculation through the TFF system, and recirculating the remainder of the retentate through the TFF system at least once. The methods can be performed using an SPTFF or a TFF system that comprises manifold segments to serialize the flow path of the feed and retentate without requiring diverter plates.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: March 22, 2022
    Assignee: EMD Millipore Corporation
    Inventors: Jonathan Steen, Mikhail Kozlov, Herbert Lutz, Joseph Parrella, Elizabeth M. Goodrich, Bala Raghunath
  • Patent number: 11278847
    Abstract: A reverse osmosis membrane is disclosed that has a hydrogel disposed on its surface, wherein the hydrogel is formed from a crosslinked polyvinylpyrrolidone or a copolymer of vinyl pyrrolidone. The hydrogel-coated membrane resists fouling by feed water contaminants. The permeate flux rate and salt rejection of the underlying membrane are not negatively affected by the hydrogel coating.
    Type: Grant
    Filed: July 30, 2019
    Date of Patent: March 22, 2022
    Inventors: Qun Song, Jane C. Li, Norman N. Li
  • Patent number: 11273412
    Abstract: A first adhesion-fixing-portion adhesively fixing hollow fiber membranes together and a hollow fiber membrane bundle and an inner wall of a housing together at an open end of the hollow fiber membranes, and a second adhesion-fixing-portion adhesively fixing the hollow fiber membranes together and the hollow fiber membrane bundle and the inner wall of the housing together at a closed end of the hollow fiber membranes are included. At least one of the second adhesion-fixing-portion and the housing around the second adhesion-fixing-portion has at least one through-hole for introducing liquid fed from the outside of the second adhesion-fixing-portion to a space in the housing. The total area of an opening or openings of at least one through-hole provided outside an outer perimeter of the hollow fiber membrane bundle is 80% or more of the total area of an opening or openings of all of the at least one through-hole.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: March 15, 2022
    Inventor: Naoyoshi Morita
  • Patent number: 11264143
    Abstract: Solid nanocomposite material comprising nanoparticles of a hexacyanometallate or octacyanometallate of an alkali metal and of a transition metal, of formula [Alk+x]Mn+[M?(CN)m]z? in which Alk is an alkali metal, x is 1 or 2, M is a transition metal, n is 2 or 3, M? is a transition metal, m is 6 or 8, z is 3 or 4, attached to at least one surface of a porous inorganic solid support, in which the nanoparticles are attached by adsorption to the at least one surface of the solid support, and in which the surface is a basic surface. Method for preparing this material. Method for extracting at least one metal cation from a liquid medium containing it, wherein the liquid medium is brought into contact with the material.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: March 1, 2022
    Inventors: Agnès Grandjean, Virginie Fremy, Alexandre Charlot, Yves Barre
  • Patent number: 11254589
    Abstract: A method of separating material, such as foam, sludge, oil or grease, at a fluid's surface, by applying acoustic pressure shock waves to the material and the fluid's surface such that acoustic pressure shock waves are propagated in liquid medium of the fluid and in gas medium above the fluid surface.
    Type: Grant
    Filed: July 8, 2019
    Date of Patent: February 22, 2022
    Assignee: SANUWAVE, INC.
    Inventors: Iulian Cioanta, John Jackson
  • Patent number: 11247182
    Abstract: Fiber webs which are used in filter media are described herein. In some embodiments, the fiber webs include fibrillated fibers and optionally non-fibrillated fibers, amongst other optional components (e.g., binder resin). In some embodiments, the fiber webs include limited amounts of, or no, glass fiber. The respective characteristics and amounts of the fibrillated fibers are selected to impart desirable properties including mechanical properties and filtration properties (e.g., dust holding capacity and efficiency), amongst other benefits.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: February 15, 2022
    Assignee: Hollingsworth & Vose Company
    Inventors: Howard Yu, Sneha Swaminathan
  • Patent number: 11241660
    Abstract: A hand-carry gravity-driven water filter with high throughput and water disinfection performance is formed. Membranes used for this water filter can be fabricated using electrospun method and non-solvent induced phase inversion method. A novel composite membrane structure (interwoven composite structure) was designed for further enhances water permeability and mechanical strength. The composite membrane can be composed of nanofibers with different diameter from the same polymer or different polymers. Membrane porosity and surface pore size can be controlled. Silver nanoparticles can be in-situ loaded on the surface of the membranes. The developed filter is effective for removal of a wide range of contaminants (e.g., pathogens, suspended solids and heavy metals). The purification process can be carried out under the drive of gravity (with an option for mechanically-enhanced filtration) without electricity.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: February 8, 2022
    Inventors: Jianqiang Wang, Xiaonan Shi, Zhe Yang, Chuyang Tang
  • Patent number: 11224686
    Abstract: A filter material and a manufacturing method thereof are provided. The manufacturing method includes hydrophilizing the filter material by supercritical fluid processing technology, so as to filter out white blood cells in the blood.
    Type: Grant
    Filed: October 28, 2019
    Date of Patent: January 18, 2022
    Assignee: Sangtech Lab Inc.
    Inventors: Cheng-Sheng Liang, Po-Ju Lin, Yu-Ping Chen, Chun-Hung Chen, Pei-Chieh Chuang
  • Patent number: 11208735
    Abstract: A method for controlling fiber cross-alignment in a nanofiber membrane, comprising: providing a multiple segment collector in an electrospinning device including a first and second segment electrically isolated from an intermediate segment positioned between the first and second segment, collectively presenting a cylindrical structure, rotating the cylindrical structure around a longitudinal axis proximate to an electrically charged fiber emitter; electrically grounding or charging edge conductors circumferentially resident on the first and second segment, maintaining intermediate collector electrically neutral; dispensing electrospun fiber toward the collector, the fiber attaching to edge conductors and spanning the separation space between edge conductors; attracting electrospun fiber attached to the edge conductors to the surface of the cylindrical structure, forming a first fiber layer; increasing or decreasing rotation speed of the cylindrical structure to alter the angular cross-alignment relationship b
    Type: Grant
    Filed: April 13, 2021
    Date of Patent: December 28, 2021
    Inventor: Maurice Haff
  • Patent number: 11207803
    Abstract: Method for preparing a membrane from fibril cellulose includes supplying fibril cellulose dispersion on a filter layer, draining liquid from a fibril cellulose dispersion by the effect of reduced pressure through the filter layer that is impermeable to fibrils of the fibril cellulose but permeable to the liquid to form a membrane sheet on the filter fabric, applying heat on the opposite side of the membrane sheet to the membrane sheet while continuing draining of the liquid through the filter layer by pressure difference over the filter layer, and removing the membrane sheet from the filter layer as a freestanding membrane.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: December 28, 2021
    Inventors: Marko Bessonoff, Jouni Paltakari, Antti Laukkanen
  • Patent number: 11202979
    Abstract: A device for reducing pressure fluctuation of a pressure filter frame and a pressure filter. The device includes a pressure filter frame that is a cylindrical housing. An inner wall of the pressure filter frame is further provided with a buffer plate. A plurality of openings are provided in the buffer plate. A gap is remained between the buffer plate and the inner wall of the pressure filter frame. A plurality of supporting posts are disposed in the gap, which fixedly connect the inner wall of the pressure filter frame with the buffer plate.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: December 21, 2021
    Inventors: Xu Zhao, Zhongxin Sun, Wanyao Zhang, Xiangnan Zhai, Guohai Zhang, Yu Guo, Xiaopeng Feng