Patents by Inventor Steven Mullens
Steven Mullens 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: 11896968Abstract: The present disclosure relates to a method for producing lanthanide doped layered double hydroxides (Ln-doped LDHs). The method includes the steps of preparing a carbonate free alkaline solution; preparing a solution of metal salts comprising a salt of a lanthanide; co-precipitating the alkaline solution and the solution of metal salts to form a mixture and Ln-doped LDH precipitate wherein the pH of the mixture is maintained at a constant value; aging the precipitate; and separating the precipitate from the solution. The alkaline solution is an aqueous ammonia solution. The present disclosure is also related to lanthanide-doped layered double hydroxides (La-doped LDHs) obtainable by such a method, as well as to the use of the lanthanide-doped layered double hydroxides obtainable by such a method.Type: GrantFiled: December 21, 2018Date of Patent: February 13, 2024Assignees: VITO NV, UNIVERSITEIT ANTWERPENInventors: Elena Mihaela Seftel, Bart Michielsen, Steven Mullens, Pegie Cool, Vera Meynen
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Publication number: 20230347595Abstract: A method and system for manufacturing a three-dimensional porous structure. Filaments are deposited in a predetermined interconnected arrangement in a plurality of stacked layers for forming a porous structure with interconnected pores. A pressure value indicative of a pressure being applied on the build material in the build material reservoir of a nozzle used for deposition is monitored during deposition of the filaments. The processing unit is configured to adjust at least one extrusion parameter in order to compensate for the irregular rising and/or falling of the pressure value.Type: ApplicationFiled: July 17, 2020Publication date: November 2, 2023Inventors: Bart MICHIELSEN, Jasper LEFEVERE, Wim BOUWEN, Steven MULLENS, Marijn GYSEN, Erwin VAN HOOF
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Publication number: 20230347577Abstract: A method and system for manufacturing one or more three-dimensional porous structures (10). Filaments (2) are deposited on a support in a predetermined interconnected arrangement in a plurality of stacked layers (11) for forming one or more porous structure with interconnected pores (15). A nozzle head (30) with a plurality of nozzles (20) is used for depositing filaments. The plurality of nozzles are spaced apart from each other with a predetermined spacing therebetween. Each nozzle has an opening area through which filaments are dispensed as the nozzle head is moved relative to the support. Multiple 3D porous structures are manufactured in parallel, using a subset of nozzles for each porous structure, each subset of nozzles including at least one nozzle. Neighboring subsets of nozzles are distanced in order to provide a working area on which the relevant porous structure of the plurality of porous structures is manufactured.Type: ApplicationFiled: July 17, 2020Publication date: November 2, 2023Inventors: Jasper LEFEVERE, Bart MICHIELSEN, Wim BOUWEN, Steven MULLENS, Marijn GYSEN
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Patent number: 11547988Abstract: Methods use a catalytic composition built up from a ceramic material including a catalytic material and a first inorganic binder and a second inorganic binder and a catalytic structure made thereof. Preferably, the structure is made by a colloidal ceramic shaping technique. The structure is used for catalytic or ion exchange applications. The catalytic structures have excellent mechanical, physicochemical and catalytic properties.Type: GrantFiled: October 29, 2021Date of Patent: January 10, 2023Assignees: VITO NV (VLAAMSE INSTELLING VOOR TECHNOLOGISCH ONDERZOEK NV), UNIVERSITEIT ANTWERPENInventors: Steven Mullens, Lidia Protasova, Jasper Lefevere
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Publication number: 20220266337Abstract: An additive manufacturing paste composition for manufacturing a three-dimensional shaped article of a material of interest, said paste composition including 70-99.8 wt. % with respect to the weight of the composition of particles of the material of interest, the material of interest being one or more compounds selected from the group of metals and metal alloys and mixtures thereof, at least one binder component, at least one additive component, which is a lubricant, one or more solvents which are miscible with each other, wherein the sum of the concentration of the at least one additive component and the at least one binder is between 0.06 wt. % and 10.0 wt. %, with respect to the weight of the paste composition, and wherein at least one of the additive component and the binder component or the mixture thereof are shear-thinning.Type: ApplicationFiled: July 20, 2020Publication date: August 25, 2022Applicant: VITO NVInventors: Steven MULLENS, Ivo THIJS, Bart MICHIELSEN, Marleen ROMBOUTS, Jo VERWIMP, Marijn GYSEN, Jasper LEFEVERE
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Publication number: 20220048013Abstract: Methods use a catalytic composition built up from a ceramic material including a catalytic material and a first inorganic binder and a second inorganic binder and a catalytic structure made thereof. Preferably, the structure is made by a colloidal ceramic shaping technique. The structure is used for catalytic or ion exchange applications. The catalytic structures have excellent mechanical, physicochemical and catalytic properties.Type: ApplicationFiled: October 29, 2021Publication date: February 17, 2022Inventors: Steven MULLENS, Lidia PROTASOVA, Jasper LEFEVERE
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Patent number: 11192095Abstract: A catalytic composition is built up from a ceramic material including a catalytic material and a first inorganic binder and a second inorganic binder and a catalytic structure made thereof. Preferably, the structure is made by a colloidal ceramic shaping technique. The structure is usable for catalytic or ion exchange applications as well. It is demonstrated that the catalytic structures have excellent mechanical, physicochemical and catalytic properties.Type: GrantFiled: September 30, 2016Date of Patent: December 7, 2021Assignees: Vito NV (Vlaamse Instelling Voor Technologisch Onderzoek NV), Universiteit AntwerpenInventors: Steven Mullens, Lidia Protasova, Jasper Lefevere
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Patent number: 11141278Abstract: A surgical implant may include a porous structure with interconnected pores for ingrowth of bone into the porous structure. The porous structure has an arrangement of fibres which are attached to one another, the fibres being arranged in stacked layers. The porous structure has a surface including different regions having different porosities. A method of making the above surgical implant is also described.Type: GrantFiled: March 29, 2018Date of Patent: October 12, 2021Assignee: VITO NVInventors: Steven Mullens, Lidia Protasova, Simge Danaci, Dirk Vangeneugden, Jasper Lefevere
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Publication number: 20200325031Abstract: The present disclosure relates to a method for producing lanthanide doped layered double hydroxides (Ln-doped LDHs). The method includes the steps of preparing a carbonate free alkaline solution; preparing a solution of metal salts comprising a salt of a lanthanide; co-precipitating the alkaline solution and the solution of metal salts to form a mixture and Ln-doped LDH precipitate wherein the pH of the mixture is maintained at a constant value; aging the precipitate; and separating the precipitate from the solution. The alkaline solution is an aqueous ammonia solution. The present disclosure is also related to lanthanide-doped layered double hydroxides (La-doped LDHs) obtainable by such a method, as well as to the use of the lanthanide-doped layered double hydroxides obtainable by such a method.Type: ApplicationFiled: December 21, 2018Publication date: October 15, 2020Inventors: Elena Mihaela SEFTEL, Bart MICHIELSEN, Steven MULLENS, Pegie COOL, Vera MEYNEN
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Publication number: 20200030102Abstract: A surgical implant may include a porous structure with interconnected pores for ingrowth of bone into the porous structure. The porous structure has an arrangement of fibres which are attached to one another, the fibres being arranged in stacked layers. The porous structure has a surface including different regions having different porosities. A method of making the above surgical implant is also described.Type: ApplicationFiled: March 29, 2018Publication date: January 30, 2020Inventors: Steven MULLENS, Lidia PROTASOVA, Simge DANACI, Dirk VANGENEUGDEN
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Publication number: 20180272323Abstract: A catalytic composition is built up from a ceramic material including a catalytic material and a first inorganic binder and a second inorganic binder and a catalytic structure made thereof. Preferably, the structure is made by a colloidal ceramic shaping technique. The structure is usable for catalytic or ion exchange applications as well. It is demonstrated that the catalytic structures have excellent mechanical, physicochemical and catalytic properties.Type: ApplicationFiled: September 30, 2016Publication date: September 27, 2018Inventors: Steven MULLENS, Lidia PROTASOVA, Jasper LEFEVERE
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Patent number: 9464342Abstract: A method for manufacturing a high ductility Ti-, Ti-alloy or NiTi-foam, meaning a compression strain higher than 10%, includes: preparing a powder suspension of a Ti-, NiTi- or Ti-alloy powder, bringing the said powder suspension into a desired form by gelcasting to form a green artifact. The method also includes a calcination step wherein the green artifact is calcined, and sintering the artifact. The calcination step includes a slow heating step wherein said green artifact is heated at a rate lower or equal to 20° C./hour to a temperature between 400° C. and 600° C. and the Ti-, NiTi- or Ti-alloy powder has a particle size less than 100 ?m. A high ductility Ti-, Ti-alloy or NiTi foam, with a compression higher than 10%, with a theoretical density less than 30%, pore size (cell size) between 50 to 1000 ?m can be obtained with such a method.Type: GrantFiled: March 24, 2015Date of Patent: October 11, 2016Assignee: VLAAMSE INSTELLING VOOR TECHNOLOGISCH ONDERZOEK (VITO)Inventors: Steven Mullens, Ivo Thijs, Jozef Cooymans, Jan Luyten
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Publication number: 20150240331Abstract: A method for manufacturing a high ductility Ti-, Ti-alloy or NiTi-foam, meaning a compression strain higher than 10%, includes: preparing a powder suspension of a Ti-, NiTi- or Ti-alloy powder, bringing the said powder suspension into a desired form by gelcasting to form a green artefact. The method also includes a calcination step wherein the green artefact is calcined, and sintering the artifact. The calcination step includes a slow heating step wherein said green artefact is heated at a rate lower or equal to 20° C./hour to a temperature between 400° C. and 600° C. and the Ti-, NiTi- or Ti-alloy powder has a particle size less than 100 ?m. A high ductility Ti-, Ti-alloy or NiTi foam, with a compression higher than 10%, with a theoretical density less than 30%, pore size (cell size) between 50 to 1000 ?m can be obtained with such a method.Type: ApplicationFiled: March 24, 2015Publication date: August 27, 2015Inventors: Steven MULLENS, Ivo THIJS, Jozef COOYMANS, Jan LUYTEN
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Patent number: 8992828Abstract: A method for manufacturing a high ductility Ti-, Ti-alloy or NiTi-foam, meaning a compression strain higher than 10%, includes: preparing a powder suspension of a Ti-, NiTi- or Ti-alloy powder, bringing the said powder suspension into a desired form by gelcasting to form a green artifact. The method also includes a calcination step wherein the green artifact is calcined, and sintering the artifact. The calcination step includes a slow heating step wherein said green artifact is heated at a rate lower or equal to 20° C./hour to a temperature between 400° C. and 600° C. and the Ti-, NiTi- or Ti-alloy powder has a particle size less than 100 ?m. A high ductility Ti-, Ti-alloy or NiTi foam, with a compression higher than 10%, with a theoretical density less than 30%, pore size (cell size) between 50 to 1000 ?m can be obtained with such a method.Type: GrantFiled: June 7, 2006Date of Patent: March 31, 2015Assignee: Vlaamse Instelling Voor Technologisch Onderzoek (VITO)Inventors: Steven Mullens, Ivo Thijs, Jozef Cooymans, Jan Luyten
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Patent number: 8557022Abstract: A method of manufacturing a filled polymeric membrane includes a first step of preparing a filler suspension having a solvent for a glassy polymer and nanometer-sized particles. The nanometer-sized particles in the filler suspension are aggregated in aggregates having an average aggregate size in the range between 50 nm and smaller than 200 nm. In a following step, the glassy polymer is added to the filler suspension to obtain a polymer suspension. Next, the glassy polymer is dissolved in the polymer suspension. In a next step, the polymer suspension is cast on a substrate, followed by a step of removing the solvent. A filled polymeric membrane includes aggregates of nanometer-sized filler particles. The membrane is used in pervaporation and nanofiltration.Type: GrantFiled: August 25, 2008Date of Patent: October 15, 2013Assignee: Vlaamse Instelling Voor Technologisch Onderzoek N.V. (VITO)Inventors: Kristien De Sitter, Steven Mullens, Lieven Gevers
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Publication number: 20110089110Abstract: A method of manufacturing a filled polymeric membrane includes a first step of preparing a filler suspension having a solvent for a glassy polymer and nanometre-sized particles. The nanometre-sized particles in the filler suspension are aggregated in aggregates having an average aggregate size in the range between 50 nm and smaller than 200 nm. In a following step, the glassy polymer is added to the filler suspension to obtain a polymer suspension. Next, the glassy polymer is dissolved in the polymer suspension. In a next step, the polymer suspension is cast on a substrate, followed by a step of removing the solvent. A filled polymeric membrane includes aggregates of nanometre-sized filler particles. The membrane is used in pervaporation and nanofiltration.Type: ApplicationFiled: August 25, 2008Publication date: April 21, 2011Applicant: Vlaamse Instelling Voor Technologisch Onderzoek N.V. (VITO)Inventors: Kristien De Sitter, Steven Mullens, Lieven Gevers
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Publication number: 20100256773Abstract: A surgical implant (10) includes a porous core part (11) made of a porous biocompatible material and a dense shell (12) made of a biocompatible material provided on a part of the surface of the porous core part which forms an interface with biological soft tissue. The dense shell shields the porous core from in-growth of soft tissue. The porous core part has open interconnected pores. A method of manufacturing a surgical implant includes the steps of: producing a porous core part, applying a viscous suspension on a part of the surface of the porous core part and applying a thermal treatment.Type: ApplicationFiled: July 3, 2008Publication date: October 7, 2010Applicant: Vlaamse Instelling Voor Technologisch Onderzoek N.V. (VITO)Inventors: Ivo Thijs, Wim Bouwen, Steven Mullens, Jan Luyten, Norbert Dejonghe
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Publication number: 20090280022Abstract: A method for manufacturing a high ductility Ti-, Ti-alloy or NiTi-foam, meaning a compression strain higher than 10%, includes: preparing a powder suspension of a Ti-, NiTi- or Ti-alloy powder, bringing the said powder suspension into a desired form by gelcasting to form a green artefact. The method also includes a calcination step wherein the green artefact is calcined, and sintering the artifact. The calcination step includes a slow heating step wherein said green artefact is heated at a rate lower or equal to 20° C./hour to a temperature between 400° C. and 600° C. and the Ti-, NiTi- or Ti-alloy powder has a particle size less than 100 ?m. A high ductility Ti-, Ti-alloy or NiTi foam, with a compression higher than 10%, with a theoretical density less than 30%, pore size (cell size) between 50 to 1000 ?m can be obtained with such a method.Type: ApplicationFiled: June 7, 2006Publication date: November 12, 2009Inventors: Steven Mullens, Ivo Thijs, Jozef Cooymans, Jan Luyten
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Patent number: 7044031Abstract: The present invention is directed to an improved tool for driving a threaded fastener, such as a hex-headed sheet metal screw. The driving socket is adapted with an counter-bore in the region of the face of driving end of the socket, sufficient to receive therein the shoulder on the fastener head. In the preferred embodiment the counter-bore is countersunk into the face of the socket, coaxially with the driving recess, and terminates in a boss which receives the shoulder of the fastener when placed in the socket for driving. An alternative embodiment of the invention includes an counter-bore in the driving end of the socket wherein the bore is a conical section, the major diameter of which is larger enough to receive the shoulder of the fastener head while being of limited depth so as to enable the majority of the fastener head to engage the driving sides of the hexagonal socket.Type: GrantFiled: May 24, 2005Date of Patent: May 16, 2006Inventor: Steven Mullen