Patents by Inventor Willem van Baak
Willem van Baak has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10633499Abstract: A process for preparing an ion-exchange membrane having a textured surface profile comprising the steps (i) and (ii): (i) screen-printing a radiation-curable composition onto a membrane in a patterned manner; and (ii) irradiating and thereby curing the printed, radiation-curable composition; wherein the radiation-curable composition has a viscosity of at least 30 Pa·s when measured at a shear rate of 0.1 s?1 at 20° C.Type: GrantFiled: January 23, 2015Date of Patent: April 28, 2020Assignee: Fujifilm Manufacturing Europe B.V.Inventors: Johannes Van Engelen, Bastiaan Van Berchum, Willem Van Baak
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Patent number: 10213743Abstract: A process for preparing an ion-exchange membrane having a textured surface profile comprising the steps (i) and (ii): (i) applying a radiation-curable composition to a membrane in a patternwise manner; and (ii) irradiating and thereby curing the radiation-curable composition present on the membrane; wherein the radiation-curable composition comprises: a) 10 to 65 wt % of curable ionic compound(s) comprising one ethylenically unsaturated group; b) 3 to 60 wt % of crosslinking agent(s) comprising at least two ethylenically unsaturated groups and having a number average molecular weight below 800; c) 0 to 70 wt % of inert solvent(s); d) 0 to 10 wt % of free-radical initiator(s); and e) 0.5 to 25 wt % of thickening agent(s).Type: GrantFiled: January 23, 2015Date of Patent: February 26, 2019Assignee: Fujifilm Manufacturing Europe B.V.Inventors: Bastiaan Van Berchum, Johannes Van Engelen, Willem Van Baak, Adam Batting
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Patent number: 10173174Abstract: A process for preparing a membrane stack comprising the steps of: (i) interposing a curable adhesive between alternate anion exchange membranes and cation exchange; and (ii) curing the adhesive; CHARACTERIZED IN THAT said adhesive, when cured, has a Shore A hardness of less than 70 and an elongation at break of at least 50%.Type: GrantFiled: February 25, 2015Date of Patent: January 8, 2019Assignee: Fujifilm Manufacturing Europe B.V.Inventors: Peter Jessen, Vinodnarain Bhikhi, Willem Van Baak, Johannes Van Engelen, Bastiaan Van Berchum
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Patent number: 10177396Abstract: A method for generating electricity comprising the steps: (A) passing a concentrated ionic solution through a first pathway in a reverse electrodialysis unit comprising a membrane stack having electrodes and alternating cation and anion exchange membranes; and (B) passing a dilute ionic solution through a second pathway in said reverse electrodialysis unit, whereby solute from the concentrated solution in the first pathway passes through the membranes to the dilute solution in the second pathway, thereby generating electricity; wherein the concentration of solute in the dilute ionic solution as it enters the reverse electrodialysis unit is at least 0.03 mol/l.Type: GrantFiled: November 18, 2013Date of Patent: January 8, 2019Assignee: Fujifilm Manufacturing Europe B.V.Inventor: Willem Van Baak
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Patent number: 10155201Abstract: A disposable, crossflow membrane stack suitable for use in an ion exchange unit, the stack comprising alternate dilution compartments and concentration compartments, each compartment being defined by a flat cation-permeable membrane (2) and a flat anion-permeable membrane (1) and at least two edges along which the cation-permeable and an anion-permeable membranes are permanently secured together wherein the cation-permeable membranes and/or the anion-permeable membranes have a textured surface profile which keep said membranes apart and/or from touching each other and wherein the edges secured together define the direction in which liquid may flow through the compartments. Also claimed are ion exchange units comprising the stack, optionally comprising a quick-release securement means to allow facile attachment and release of modular units comprising the stacks.Type: GrantFiled: January 23, 2015Date of Patent: December 18, 2018Assignee: Fujifilm Manufacturing Europe B.V.Inventors: Willem Van Baak, Vinodnarain Bhikhi, Bastiaan Van Berchum, Johannes Van Engelen
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Patent number: 10035105Abstract: A process for preparing a membrane stack comprising the steps of (i) interposing a curable adhesive between alternate anion exchange membranes and cation exchange; and (ii) curing the adhesive; CHARACTERIZED IN THAT said membranes are in a swollen state when step (ii) is performed.Type: GrantFiled: February 25, 2015Date of Patent: July 31, 2018Assignee: Fujifilm Manufacturing Europe B.V.Inventors: Vinodnarain Bhikhi, Peter Jessen, Willem Van Baak, Johannes Van Engelen, Bastiaan Van Berchum
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Patent number: 9969628Abstract: An electrodialysis unit comprising at least two electrodialysis stacks (ED1 and ED2) connected in series, wherein: (a) stacks ED1 and ED2 comprise anion exchange membranes and cation exchange membranes; and (b) the anion exchange membranes in stack ED1 have a lower electrical resistance than the anion exchange membranes in stack ED2 and the cation exchange membranes in stack ED1 have a lower electrical resistance than the cation exchange membranes in stack ED2. Also claimed is a process for purifying liquids, e.g. for desalinating sea water or brackish water.Type: GrantFiled: June 12, 2014Date of Patent: May 15, 2018Assignee: Fujifilm Manufacturing Europe B.V.Inventors: Vinodnarain Bhikhi, Willem Van Baak
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Publication number: 20170056826Abstract: A process for preparing a membrane stack comprising the steps of (i) interposing a curable adhesive between alternate anion exchange membranes and cation exchange; and (ii) curing the adhesive; CHARACTERISED IN THAT said membranes are in a swollen state when step (ii) is performed.Type: ApplicationFiled: February 25, 2015Publication date: March 2, 2017Inventors: Vinodnarain Bhikhi, Peter Jessen, Willem Van Baak, Johannes Van Engelen, Bastiaan Van Berchum
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Publication number: 20170056828Abstract: A process for preparing a membrane stack comprising the steps of: (i) interposing a curable adhesive between alternate anion exchange membranes and cation exchange; and (ii) curing the adhesive; CHARACTERISED IN THAT said adhesive, when cured, has a Shore A hardness of less than 70 and an elongation at break of at least 50%.Type: ApplicationFiled: February 25, 2015Publication date: March 2, 2017Inventors: Peter Jessen, Vinodnarain Bhikhi, Willem Van Baak, Johannes Van Engelen, Bastiaan Van Berchum
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Publication number: 20170029586Abstract: A process for preparing an ion-exchange membrane having a textured surface profile comprising the steps (i) and (ii): (i) screen-printing a radiation-curable composition onto a membrane in a patterned manner; and (ii) irradiating and thereby curing the printed, radiation-curable composition; wherein the radiation-curable composition has a viscosity of at least 30 Pa·s when measured at a shear rate of 0.1 s?1 at 20° C.Type: ApplicationFiled: January 23, 2015Publication date: February 2, 2017Inventors: Johannes Van Engelen, Bastiaan Van Berchum, Willem Van Baak
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Publication number: 20170007965Abstract: A process for preparing an ion-exchange membrane having a textured surface profile comprising the steps (i) and (ii): (i) applying a radiation-curable composition to a membrane in a patternwise manner; and (ii) irradiating and thereby curing the radiation-curable composition present on the membrane; wherein the radiation-curable composition comprises: a) 10 to 65 wt % of curable ionic compound(s) comprising one ethylenically unsaturated group; b) 3 to 60 wt % of crosslinking agent(s) comprising at least two ethylenically unsaturated groups and having a number average molecular weight below 800; c) 0 to 70 wt % of inert solvent(s); d) 0 to 10 wt % of free-radical initiator(s);and e) 0.5 to 25 wt % of thickening agent(s).Type: ApplicationFiled: January 23, 2015Publication date: January 12, 2017Inventors: Bastiaan Van Berchum, Johannes Van Engelen, Willem Van Baak, Adam Batting
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Publication number: 20170001146Abstract: A disposable, crossflow membrane stack suitable for use in an ion exchange unit, the stack comprising alternate dilution compartments and concentration compartments, each compartment being defined by a flat cation-permeable membrane (2) and a flat anion-permeable membrane (1) and at least two edges along which the cation-permeable and an anion-permeable membranes are permanently secured together wherein the cation-permeable membranes and/or the anion-permeable membranes have a textured surface profile which keep said membranes apart and/or from touching each other and wherein the edges secured together define the direction in which liquid may flow through the compartments. Also claimed are ion exchange units comprising the stack, optionally comprising a quick-release securement means to allow facile attachment and release of modular units comprising the stacks.Type: ApplicationFiled: January 23, 2015Publication date: January 5, 2017Inventors: Willem Van Baak, Vinodnarain Bhikhi, Bastiaan Van Berchum, Johannes Van Engelen
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Patent number: 9527973Abstract: A process for preparing a membrane comprising applying a curable composition to a porous support and curing the composition, wherein the composition comprises: a) a curable ionic compound; b) a first crosslinking agent; c) a second crosslinking agent; d) an inert solvent; and e) optionally a free radical initiator; wherein the second crosslinking agent has a melting point below 80° C. Also claimed are the compositions and membranes obtainable by using the process.Type: GrantFiled: March 22, 2013Date of Patent: December 27, 2016Assignee: Fujifilm Manufacturing Europe BVInventors: Jacko Hessing, Willem Van Baak
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Publication number: 20160152492Abstract: An electrodialysis unit comprising at least two electrodialysis stacks (ED1 and ED2) connected in series, wherein: (a) stacks ED1 and ED2 comprise anion exchange membranes and cation exchange membranes; and (b) the anion exchange membranes in stack ED1 have a lower electrical resistance than the anion exchange membranes in stack ED2 and the cation exchange membranes in stack ED1 have a lower electrical resistance than the cation exchange membranes in stack ED2. Also claimed is a process for purifying liquids, e.g. for desalinating sea water or brackish water.Type: ApplicationFiled: June 12, 2014Publication date: June 2, 2016Inventors: Vinodnarain Bhikhi, Willem Van Baak
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Publication number: 20150311558Abstract: A method for generating electricity comprising the steps: (A) passing a concentrated ionic solution through a first pathway in a reverse electrodialysis unit comprising a membrane stack having electrodes and alternating cation and anion exchange membranes; and (B) passing a dilute ionic solution through a second pathway in said reverse electrodialysis unit, whereby solute from the concentrated solution in the first pathway passes through the membranes to the dilute solution in the second pathway, thereby generating electricity; wherein the concentration of solute in the dilute ionic solution as it enters the reverse electrodialysis unit is at least 0.03 mol/l.Type: ApplicationFiled: November 18, 2013Publication date: October 29, 2015Inventor: Willem Van Baak
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Publication number: 20150105481Abstract: A process for preparing a membrane comprising applying a curable composition to a porous support and curing the composition, wherein the composition comprises: a) a curable ionic compound; b) a first crosslinking agent; c) a second crosslinking agent; d) an inert solvent; and e) optionally a free radical initiator; wherein the second crosslinking agent has a melting point below 80° C. Also claimed are the compositions and membranes obtainable by using the process.Type: ApplicationFiled: March 22, 2013Publication date: April 16, 2015Inventors: Jacko Hessing, Willem Van Baak
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Publication number: 20080070029Abstract: The present invention relates to a process for making microporous membranes by curing compounds through radiation. The invention further relates to image recording materials, in which these microporous membranes are used. According to the present invention a microporous membrane is prepared by the steps of providing a curable compound solvent mixture, wherein the concentration of said curable compound is between 20 and 80 weight percent and wherein at least 30 weight percent of said solvent is water; applying said mixture to a support; curing said curable compound mixture by exposing to radiation, thereby causing phase separation between the crosslinked curable compound and the solvent; subjecting the resulting microporous membrane to a drying or washing step to remove said solvent; and optionally separating the support and the microporous membrane.Type: ApplicationFiled: September 21, 2007Publication date: March 20, 2008Applicant: FUJIFILM Manufacturing Europe B.V.Inventors: Jacko Hessing, Willem van Baak, Akira Kase