Patents by Inventor Jan de Vries
Jan de Vries 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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Publication number: 20250100991Abstract: The invention pertains to a process for processing a crude lactide comprising the steps of: separating a crude lactide stream comprising L-lactide, D-lactide, and meso-lactide in one or more steps to form a meso-lactide stream comprising at least 50 wt. % of meso-lactide (based on the total weight of lactide in the stream) and at least one purified lactide stream comprising L-lactide and/or D-lactide; oligomerizing the meso-lactide stream to form an oligomer-containing stream comprising lactic acid oligomers; and depolymerizing the oligomer-containing stream to form a product stream comprising meso-lactide, L-lactide and D-lactide. The invention also pertains to a process for producing a polylactide and to a process for producing a racemic mixture of (S)-lactic acid and (R)-lactic acid.Type: ApplicationFiled: January 20, 2023Publication date: March 27, 2025Inventors: Hans DE VRIES, Gerrit GOBIUS DU SART, Jan VAN KRIEKEN
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Patent number: 12220827Abstract: A shaver head for an electric shaver has at least two hair-cutting units, each of which includes an external cutting member and an internal cutting member that is rotatable relative to the external cutting member. Each of the hair-cutting units is supported by a supporting portion that is linearly movable under the bias of a spring member relative to a base portion of the shaver head between a first, retracted position and a second, extended position. The shaver head has a locking mechanism for selectively locking the supporting portion in a locked position relative to the base portion allowing a user to select different shaving modes.Type: GrantFiled: November 25, 2020Date of Patent: February 11, 2025Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Geert-Jan Darwinkel, Alwin William De Vries, Ivar Bosma, Marcus Cornelis Petrelli
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Publication number: 20240248009Abstract: Disclosed herein is an air collecting device (1) for a dust measuring system, the air collecting device (1) comprising: a housing (2) defining a first chamber (21) and a second chamber (22); an air inlet structure (3) opening into the first chamber (21) and being configured for providing an incoming air stream from the outside environment into the first chamber (21); an air outlet structure (4) configured for expelling air from the first chamber (21) and/or the second chamber (22); an adapter structure (5), the adapter structure (5) being configured for being connected with a dust sensor assembly, wherein the adapter structure (5) comprises a fluidic connection to the first chamber (21) and a fluidic connection to the second chamber (22); and a connecting portion (23) establishing a fluidic connection between the first chamber (21) and the second chamber (22); wherein the first chamber (21) and the second chamber (22) are partially separated by a separator wall (24); and wherein the first chamber (21) and/orType: ApplicationFiled: June 2, 2022Publication date: July 25, 2024Applicant: ZEHNDER GROUP INTERNATIONAL AGInventor: Jan DE VRIES
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Publication number: 20230256525Abstract: The invention concerns a drilling device (1) and a method for drilling holes in a stack of material (100). The drilling device is provided with clamping means (23, 26) for clamping the material, a hollow drill (10) with an internal channel and a drive (3) for the hollow drill. The drilling device is further provided with connecting means (4) for cooling means, that are arranged for conducting gas through the internal channel, and suction means (51) for suctioning drilling debris. The drilling shaft is provided with a cut out, that runs in longitudinal direction along the drill shaft and forms a discharge channel for the drilling debris. The invention also concerns a machine for machining and assembling window coverings, such as pleated blinds, comprising one or more drilling devices according to the invention.Type: ApplicationFiled: February 10, 2023Publication date: August 17, 2023Inventors: Ruben Hubert Jan De Vries, Bastiaan Franciscus Klein Tuente, Bram Starren, Maarten Petrus Maria Janssens
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Publication number: 20230235416Abstract: A method for processing natural or synthetic leather by using super-critical CO2. The leather can be dried leather, low grade leathers, thin leather, crust leathers, finished leathers, wet blue leathers, and tanned leather, as well as synthetic leather. In a second aspect the invention relates to leather obtained by said method, and in a third aspect to a stand-alone apparatus for performing said method.Type: ApplicationFiled: July 29, 2021Publication date: July 27, 2023Applicant: FOLIUM BIOSCIENCES EUROPE B.V.Inventors: Daniela Oana TRAMBITAS, Brigitta BOHUS, Tjerk Jan DE VRIES, Geert Feye WOERLEE
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Publication number: 20230206457Abstract: The invention relates to a system (1) for counting corrugations in a flexible material (100). The system is provided with a carrier (10) with a measuring area (12) and with aligning means (14) for aligning the flexible material in the measuring area, a light source for illuminating the measuring area, a camera for making one or more image recordings of the measuring area and a processor (23), which is arranged for counting the number of corrugations in one or more of the image recordings. The invention also relates to a method for counting a desired number of corrugations in a flexible material, for example pleats in fabric for a window covering, such as a pleated curtain. The invention furthermore relates to a computer program comprising instructions for carrying out the steps of the method.Type: ApplicationFiled: December 12, 2022Publication date: June 29, 2023Inventors: Ruben Hubert Jan De Vries, Bastiaan Franciscus Klein Tuente, Sasa Jusufovic, Maarten Petrus Maria Janssens
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Publication number: 20230173405Abstract: The invention provides a method for extraction of at least one extract compound from a material, comprising: a. contacting carbon dioxide with the material to dissolve an amount of the at least one extract compound from the material into the carbon dioxide; b. contacting the carbon dioxide comprising the at least dissolved extract compound with a sorbent to sorb the at least one extract compound onto the sorbent and for regenerating the carbon dioxide; c. recirculating the regenerated carbon dioxide; and d. repeating said recirculating at a constant density of said carbon dioxide of between 100 and 1000 kg/m3, and repeating said recirculating for at least 10 cycles.Type: ApplicationFiled: May 7, 2021Publication date: June 8, 2023Applicant: FEYECON DEVELOPMENT & IMPLEMENTATION B.V.Inventors: Tjerk Jan DE VRIES, Gerard Willem HOFLAND, Geert Feye WOERLEE, Lopes Paulo Dinis VALE
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Patent number: 11505993Abstract: An operating device for a screen comprises: a first operating mechanism with a first operating element which is connected to a first movement transfer element connected by means of a first transmission to a drive element for a screen shaft. The first operating mechanism is configured to convert a linear movement of the first operating element to a rotational movement of the drive element for operating the screen shaft in a first rotational direction. The operating device further comprises a second operating mechanism comprising a second operating element which is connected to a second movement transfer element connected by means of a second transmission to the drive element. The second operating mechanism is configured to convert a linear movement of the second operating element to a rotational movement of the drive element for operating the screen shaft in a second rotational direction opposite to the first rotational direction.Type: GrantFiled: August 28, 2020Date of Patent: November 22, 2022Assignee: Coulisse B.V.Inventors: Ruben Hubert Jan de Vries, Bastiaan Franciscus Klein Tuente, Harry Davids, Wouter Hendriks, Thomas Johan Maria Ter Haar
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Patent number: 11332973Abstract: The invention relates to a spring operated roller blind system, wherein the roller blind (1) comprises an adjusting mechanism (30) for adjusting an end position of the flexible sheet member. The adjusting mechanism comprises a spindle (36) and a connecting member (31) that is connected to the roller shaft for rotation around the spindle. The adjusting mechanism further comprises a first bearing (7) for the roller shaft that defines a first end position for the connecting member (31). At least one of the bracket connectors (21) comprises a pin (33) for detachable mounting in a cooperating recess (35) on the adjusting mechanism, wherein the pin and the recess have an unround cross section.Type: GrantFiled: June 7, 2017Date of Patent: May 17, 2022Assignee: Coulisse B.V.Inventors: Ruben Hubert Jan De Vries, Bastiaan Franciscus Klein Tuente, Thomas Johan Maria Ter Haar
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Publication number: 20210222135Abstract: The present disclosure provides engineered ketoreductase enzymes having improved properties as compared to a naturally occurring wild-type ketoreductase enzyme including the capability of reducing 5-((4S)-2-oxo-4-phenyl (1,3-oxazolidin-3-yl))-1-(4-fluorophenyl) pentane-1,5-dione to (4S)-3-[(5S)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-4-phenyl-1,3-oxazolidin-2-one. Also provided are polynucleotides encoding the engineered ketoreductase enzymes, host cells capable of expressing the engineered ketoreductase enzymes, and methods of using the engineered ketoreductase enzymes to synthesize the intermediate (4S)-3-[(5S)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-4-phenyl-1,3-oxazolidin-2-one in a process for making Ezetimibe.Type: ApplicationFiled: March 29, 2021Publication date: July 22, 2021Inventors: Emily Mundorff, Erik Jan De Vries
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Patent number: 10988739Abstract: The present disclosure provides engineered ketoreductase enzymes having improved properties as compared to a naturally occurring wild-type ketoreductase enzyme including the capability of reducing 5-((4S)-2-oxo-4-phenyl (1,3-oxazolidin-3-yl))-1-(4-fluorophenyl) pentane-1,5-dione to (4S)-3-[(5S)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-4-phenyl-1,3-oxazolidin-2-one. Also provided are polynucleotides encoding the engineered ketoreductase enzymes, host cells capable of expressing the engineered ketoreductase enzymes, and methods of using the engineered ketoreductase enzymes to synthesize the intermediate (4S)-3-[(5S)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-4-phenyl-1,3-oxazolidin-2-one in a process for making Ezetimibe.Type: GrantFiled: December 9, 2019Date of Patent: April 27, 2021Assignee: Codexis, Inc.Inventors: Emily Mundorff, Erik Jan De Vries
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Publication number: 20200392786Abstract: The invention relates to an operating device (1) for a screen, comprising: a first operating mechanism with a first operating element (7) which is connected to a first movement transfer element connected by means of a first transmission to a drive element (60) for a screen shaft. The first operating mechanism is configured to convert a linear movement of the first operating element to a rotational movement of the drive element for operating the screen shaft in a first rotational direction (R). The operating device (1) further comprises a second operating mechanism comprising a second operating element (8) which is connected to a second movement transfer element connected by means of a second transmission to the drive element (60). The second operating mechanism is configured to convert a linear movement of the second operating element to a rotational movement of the drive element for operating the screen shaft in a second rotational direction (L) opposite to the first rotational direction.Type: ApplicationFiled: August 28, 2020Publication date: December 17, 2020Inventors: Ruben Hubert Jan de Vries, Bastiaan Franciscus Klein Tuente, Harry Davids, Wouter Hendriks, Thomas Johan Maria Ter Haar
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Patent number: 10633917Abstract: A motorized drive of a window covering provided with a device for manually operating the motorized drive comprising a housing to be attached to the window covering with a pull cord and a push button for manual operation. A switch converts pulling movements on the pull cord into first electrical signals for the motorized drive. Controls are configured to save a setting value associated with a current position of the window covering in a data memory after receiving second electrical signals from the push button. A method for saving setting values associated with different positions of the window covering provided with the motorized drive comprising the steps of saving a current position by manual operation of the pull cord and/or the push button.Type: GrantFiled: March 14, 2017Date of Patent: April 28, 2020Assignee: Coulisse B.V.Inventors: Ruben Hubert Jan de Vries, Bastiaan Franciscus Klein Tuente, Harry Davids, Wouter Hendriks
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Publication number: 20200095561Abstract: The present disclosure provides engineered ketoreductase enzymes having improved properties as compared to a naturally occurring wild-type ketoreductase enzyme including the capability of reducing 5-((4S)-2-oxo-4-phenyl (1,3-oxazolidin-3-yl))-1-(4-fluorophenyl) pentane-1,5-dione to (4S)-3-[(5S)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-4-phenyl-1,3-oxazolidin-2-one. Also provided are polynucleotides encoding the engineered ketoreductase enzymes, host cells capable of expressing the engineered ketoreductase enzymes, and methods of using the engineered ketoreductase enzymes to synthesize the intermediate (4S)-3-[(5S)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-4-phenyl-1,3-oxazolidin-2-one in a process for making Ezetimibe.Type: ApplicationFiled: December 9, 2019Publication date: March 26, 2020Inventors: Emily Mundorff, Erik Jan De Vries
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Patent number: 10544401Abstract: The present disclosure provides engineered ketoreductase enzymes having improved properties as compared to a naturally occurring wild-type ketoreductase enzyme including the capability of reducing 5-((4S)-2-oxo-4-phenyl (1,3-oxazolidin-3-yl))-1-(4-fluorophenyl) pentane-1,5-dione to (4S)-3-[(5S)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-4-phenyl-1,3-oxazolidin-2-one. Also provided are polynucleotides encoding the engineered ketoreductase enzymes, host cells capable of expressing the engineered ketoreductase enzymes, and methods of using the engineered ketoreductase enzymes to synthesize the intermediate (4S)-3-[(5S)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-4-phenyl-1,3-oxazolidin-2-one in a process for making Ezetimibe.Type: GrantFiled: February 11, 2019Date of Patent: January 28, 2020Assignee: Codexis, Inc.Inventors: Emily Mundorff, Erik Jan De Vries
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Patent number: 10428580Abstract: A roller blind system, comprising a roller blind having a roller shaft through which a central rod extends and to which a flexible sheet member is attached. The roller blind is provided with two bracket connectors arranged for releasable coupling to mounting brackets. The roller blind is spring operated and comprises a tension spring fixedly connected to the central rod and to the roller shaft and a tension adjusting mechanism for adjusting the tension of the tension spring. The tension adjusting mechanism comprises an adjusting wheel and an adjusting spring for adjusting the rotational position of the central rod, a first bush part arranged on the adjusting wheel for pushing the adjusting spring in a relaxed configuration and a second bush part connected to the central rod for pushing the adjusting spring in a tightened configuration.Type: GrantFiled: October 27, 2016Date of Patent: October 1, 2019Assignee: Coulisse B.V.Inventors: Ruben Hubert Jan de Vries, Bastiaan Franciscus Klein Tuente, Thomas Johan Maria Ter Haar
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Publication number: 20190263975Abstract: A process for producing non-surface modified nanocellulose particles in the form of a powder, comprising the steps of i. providing a suspension of never-dried, non-surface modified nanocellulose particles in an aqueous liquid, which is non-solubilising for the non-surface modified nanocellulose particles, and which is water or an aqueous solution of morpholine or piperidine or mixtures thereof, ii. contacting the suspension of non-surface modified nanocellulose particles with a fluid in a supercritical state, which fluid is miscible with the aqueous liquid and is non-solubilising for the non-surface modified nanocellulose particles, under conditions suitable for the transfer of the aqueous liquid into the fluid in a supercritical state, iii. removing the aqueous liquid and the fluid in a supercritical state by controlling pressure and/or temperature, to form the non-surface modified nanocellulose particles, and iv.Type: ApplicationFiled: November 7, 2017Publication date: August 29, 2019Applicant: SAPPI Netherlands Services B.V.Inventors: Math JENNEKENS, Daniela Oana TRAMBITAS, Tjerk Jan DE VRIES
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Publication number: 20190162021Abstract: The invention relates to a spring operated roller blind system, wherein the roller blind (1) comprises an adjusting mechanism (30) for adjusting an end position of the flexible sheet member. The adjusting mechanism comprises a spindle (36) and a connecting member (31) that is connected to the roller shaft for rotation around the spindle. The adjusting mechanism further comprises a first bearing (7) for the roller shaft that defines a first end position for the connecting member (31). At least one of the bracket connectors (21) comprises a pin (33) for detachable mounting in a cooperating recess (35) on the adjusting mechanism, wherein the pin and the recess have an unround cross section.Type: ApplicationFiled: June 7, 2017Publication date: May 30, 2019Inventors: , Ruben Hubert Jan DE VRIES, Bastiaan Franciscus KLEIN TUENTE, Thomas Johan Maria TER HAAR
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Publication number: 20190161740Abstract: The present disclosure provides engineered ketoreductase enzymes having improved properties as compared to a naturally occurring wild-type ketoreductase enzyme including the capability of reducing 5-((4S)-2-oxo-4-phenyl (1,3-oxazolidin-3-yl))-1-(4-fluorophenyl) pentane-1,5-dione to (4S)-3-[(5S)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-4-phenyl-1,3-oxazolidin-2-one. Also provided are polynucleotides encoding the engineered ketoreductase enzymes, host cells capable of expressing the engineered ketoreductase enzymes, and methods of using the engineered ketoreductase enzymes to synthesize the intermediate (4S)-3-[(5S)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-4-phenyl-1,3-oxazolidin-2-one in a process for making Ezetimibe.Type: ApplicationFiled: February 11, 2019Publication date: May 30, 2019Inventors: Emily Mundorff, Erik Jan De Vries
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Patent number: 10246687Abstract: The present disclosure provides engineered ketoreductase enzymes having improved properties as compared to a naturally occurring wild-type ketoreductase enzyme including the capability of reducing 5-((4S)-2-oxo-4-phenyl (1,3-oxazolidin-3-yl))-1-(4-fluorophenyl) pentane-1,5-dione to (4S)-3-[(5S)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-4-phenyl-1,3-oxazolidin-2-one. Also provided are polynucleotides encoding the engineered ketoreductase enzymes, host cells capable of expressing the engineered ketoreductase enzymes, and methods of using the engineered ketoreductase enzymes to synthesize the intermediate (4S)-3-[(5S)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-4-phenyl-1,3-oxazolidin-2-one in a process for making Ezetimibe.Type: GrantFiled: July 10, 2018Date of Patent: April 2, 2019Assignee: Codexis, Inc.Inventors: Emily Mundorff, Erik Jan De Vries