Patents Assigned to CELLUTECH AB
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Patent number: 11602872Abstract: A transparent wood comprising at least one polymer and a wood substrate comprising more than 15% lignin, measured as Klason lignin, and having an optical transmittance of at least 60%, as well as a method for its preparation.Type: GrantFiled: March 29, 2018Date of Patent: March 14, 2023Assignee: Cellutech ABInventors: Yuanyuan Li, Ramiro Rojas, Lars Berglund
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Patent number: 11091877Abstract: The present invention relates to cellular solid materials comprising cellulose nanofibers (CNF) and an anionic or non-ionic surfactant, a method for preparation of such materials, as well as their use.Type: GrantFiled: April 21, 2015Date of Patent: August 17, 2021Assignee: Cellutech ABInventors: Erik Johansson, Nicholas Tchang Cervin, Korneliya Gordeyeva, Lennart Bergstrom, Lars-Erik Wagberg
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Patent number: 10907020Abstract: The present invention relates to cellular solid materials comprising cellulose nanofibers (CNF) and an anionic surfactant, a method for preparation of such materials, as well as their use.Type: GrantFiled: October 29, 2015Date of Patent: February 2, 2021Assignee: Cellutech ABInventors: Erik Johansson, Nicholas Tchang Cervin, Lars-Erik Wagberg
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Patent number: 10099192Abstract: The present invention relates to a method for the preparation of polymer shells, preferably composed of cellulose or hemicellulose, comprising the steps of dissolving the polymer component in a first solvent, preferably an organic solvent and precipitating the polymer component by contacting the first solution with a second solvent, which second solvent has a polar character, and in which second solvent the polymer component is essentially insoluble, thereby obtaining polymer shells. Moreover, the invention refers to the polymer shells as such, having permeable and responsive properties, as well as various applications comprising such polymer shells within the fields of drug delivery, separation techniques, and inter alia filling material.Type: GrantFiled: February 9, 2010Date of Patent: October 16, 2018Assignee: Cellutech ABInventors: Christopher Carrick, Bert Pettersson, Lars Wågberg, Marcus Ruda
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Patent number: 10035890Abstract: The present invention relates to films comprising a xyloglucan comprising not more than 11 mol % galactose residues, as well as a method for making such films, and its use as an oxygen barrier.Type: GrantFiled: October 29, 2014Date of Patent: July 31, 2018Assignee: Cellutech ABInventors: Jose Joby Kochumalayil, Lars Berglund
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Patent number: 9767944Abstract: The present invention relates to cellulose nanofibrils decorated with magnetic nanoparticles as well as a method for the preparation thereof and a material comprising the nanofibrils.Type: GrantFiled: February 11, 2013Date of Patent: September 19, 2017Assignee: CELLUTECH ABInventors: Sylvain Galland, Richard T. Olsson, Lars Berglund
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Patent number: 9700915Abstract: The present invention provides a method for the production of a superhydrophobic film, surface or material comprising the steps of: (i) providing a composition comprising a hydrophobic substance and a hydrophilic solvent, the hydrophilic solvent being a liquid at a temperature of 25° C. and atmospheric pressure; and (ii) spraying the composition towards a substrate for deposition of a solid residue onto the surface of the substrate for generation of the superhydrophobic film, surface or material; wherein the temperature of the composition is higher that the temperature of the substrate when carrying out step (ii). A composition, use of the composition and a substrate is also provided.Type: GrantFiled: December 16, 2011Date of Patent: July 11, 2017Assignee: CELLUTECH ABInventor: Marcus Ruda
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Patent number: 9556325Abstract: A hydrophobized nanofibrillated cellulose foam comprising a charged hydrophobic amine, a method for providing such foam and its use.Type: GrantFiled: July 10, 2013Date of Patent: January 31, 2017Assignee: Cellutech ABInventors: Nicholas Tchang Cervin, Lennart Bergström, Lars-Erik Wågberg
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Publication number: 20150357099Abstract: The present invention relates to cellulose nanofibrils decorated with magnetic nanoparticles as well as a method for the preparation thereof and a material comprising the nanofibrils.Type: ApplicationFiled: February 11, 2013Publication date: December 10, 2015Applicant: CELLUTECH ABInventors: Sylvain GALLAND, Richard T. OLSSON, Lars BERGLUND
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Patent number: 9133578Abstract: The present invention relates to a polymer made of a primary amine functionalized polymer and a hemicellulose e.g. chitosan and xyloglucan, wherein the primary amine functionalized polymer is covalently bound to the hemicellulose, and to a cross-linking agent composition comprising the polymer. A method wherein manufacturing a cellulose containing product comprises the steps of; providing a cellulose containing product; treating said cellulose product with a cellulose adsorbing agent comprising a polymer made of a primary amine functionalized polymer and a hemicellulose e.g. chitosan and xyloglucan, and optionally other additives is also provided.Type: GrantFiled: May 27, 2010Date of Patent: September 15, 2015Assignee: CELLUTECH ABInventors: Marcus Ruda, Rikard Slätteg{dot over (a)}rd
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Publication number: 20150158995Abstract: A hydrophobized nanofibrillated cellulose foam comprising a charged hydrophobic amine, a method for providing such foam and its use.Type: ApplicationFiled: July 10, 2013Publication date: June 11, 2015Applicant: Cellutech ABInventors: Nicholas Tchang Cervin, Lennart Bergström, Lars-Erik Wågberg
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Patent number: 8785623Abstract: The present invention relates to ferromagnetic materials based on nano-sized bacterial cellulose templates. More specifically, the present invention provides an agglomerate free magnetic nanoparticle cellulose material and a method of forming such magnetic nanoparticle cellulose material. Further, the magnetic nonoparticles are physically attached on the cellulose material and evenly distribute.Type: GrantFiled: March 31, 2008Date of Patent: July 22, 2014Assignee: Cellutech ABInventors: Richard T. Olsson, My Ahmed Said Samir Azizi, Lars Berglund, Ulf W. Gedde
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Patent number: 8722143Abstract: The present invention refers to a method for preparing a superhydrophobic surface on a solid substrate comprising the steps of (a) providing a solvent in the form of a pressurized fluid in a vessel, wherein the fluid exhibits a decrease in solvency power with decreasing pressure; (b) adding a hydrophobic substance to the solvent as a solute, which substance is soluble with the pressurized fluid and has the ability to crystallize/precipitate after expansion of the fluid, thereby obtaining a solution of the solvent and the solute in the vessel; (c) having at least one orifice opened on the vessel, thereby causing the pressurized solution to flow out of the vessel and depressurize in ambient air or in an expansion chamber having a lower pressure than within the vessel, the solute thereby forming particles; and (d) depositing the particles on the substrate in order to obtain a superhydrophobic surface.Type: GrantFiled: June 30, 2008Date of Patent: May 13, 2014Assignee: Cellutech ABInventors: Oskar Peter Werner, Lars-Erik Rudolf Wagberg, Can Quan, Charlotta Kristina Turner, Jan-Christer Eriksson
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Publication number: 20140079931Abstract: The present invention relates to cellulose-based materials comprising nanofibrillated cellulose (NFC) from native cellulose. exhibiting highly superior properties as compared to other cellulose-based materials, a method for preparing such cellulose-based material, and uses thereof are also disclosed.Type: ApplicationFiled: March 26, 2012Publication date: March 20, 2014Applicant: CELLUTECH ABInventors: Lars Berglund, Houssine Sehaqui, Qi Zhou
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Publication number: 20130330543Abstract: The present invention provides a method for the production of a superhydrophobic film, surface or material comprising the steps of: (i) providing a composition comprising a hydrophobic substance and a hydrophilic solvent, the hydrophilic solvent being a liquid at a temperature of 25° C. and atmospheric pressure; and (ii) spraying the composition towards a substrate for deposition of a solid residue onto the surface of the substrate for generation of the superhydrophobic film, surface or material; wherein the temperature of the composition is higher that the temperature of the substrate when carrying out step (ii). A composition, use of the composition and a substrate is also provided.Type: ApplicationFiled: December 16, 2011Publication date: December 12, 2013Applicant: CELLUTECH ABInventor: Marcus Ruda