Patents by Inventor Sandeep Unnikrishnan

Sandeep Unnikrishnan 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).

  • Publication number: 20230352607
    Abstract: Translucent photovoltaic product, method of manufacturing the same and manufacturing apparatus. The method comprises: depositing a stack of layers on a carrier substrate, the stack comprising a first electrode layer, a photovoltaic layer and a second electrode layer; cutting through the substrate with the stack of layers to form a first and a second mutually disjoint sections; separating the first and the second section from each other; laminating the first section and the second section with a respective further substrate at a side opposite the carrier substrate to form a respective first and second photovoltaic device; and assembling the photovoltaic product from the first photovoltaic device and the second photovoltaic device, wherein the first and the second sections are mutually complementary comb shaped structures and wherein the second photovoltaic device is arranged in a second plane parallel to and in front of a first plane of said first photovoltaic device.
    Type: Application
    Filed: December 18, 2020
    Publication date: November 2, 2023
    Inventors: Sandeep UNNIKRISHNAN, Yulia GALAGAN, Henri FLEDDERUS, Hieronymus Antonius Josephus Maria ANDRIESSEN, Herbert LIFKA
  • Publication number: 20220052378
    Abstract: The present disclosure concerns a solid state electrolyte for providing an ion conductive connection between a negative and positive electrode in a battery, the solid state electrolyte comprising: an ion conductive matrix comprising a polymer, and a metal salt dispersed in the ion conductive matrix, and a first ceramic material, wherein at least one of the faces of the ion conductive matrix for connecting to the negative or positive electrode, is infiltrated with the first ceramic material to form a first, hybrid interface layer.
    Type: Application
    Filed: December 19, 2018
    Publication date: February 17, 2022
    Inventors: Michal TULODZIECKI, Sandeep UNNIKRISHNAN, Lucas Augustinus HAVERKATE
  • Publication number: 20220020991
    Abstract: The present disclosure concerns a rechargeable battery cell comprising a compressible elastic composite material to form one or more of: a compressible and elastic first current collector; and a compressible and elastic positive electrode; and a compressible and elastic solid state electrolyte; and a compressible and elastic negative electrode; and a compressible and elastic second current collector, wherein the compressible elastic composite material comprises a plurality of compressible pores.
    Type: Application
    Filed: December 5, 2019
    Publication date: January 20, 2022
    Inventors: Michal TULODZIECKI, Sandeep UNNIKRISHNAN, Franky Flory VERCAUTEREN, Lucas Augustinus HAVERKATE
  • Patent number: 11189391
    Abstract: The invention relates to a method of manufacturing a structured grating, a corresponding structured grating component (1) and an imaging system. The method comprising the steps of: providing (110, 120, 130) a catalyst (30) on a substrate (20), the catalyst (20) having a grating pattern; growing (140) nanostructures (50) on the catalyst (30) so as to form walls (52) and trenches (54) based on the grating pattern; and filling (160) the trenches (54) between the walls (52) of nanostructures (50) using an X-ray absorbing material (70). The invention provides an improved method for manufacturing a structured grating and such structured grating component (1), which is particularly suitable for dark-field X-ray imaging or phase-contrast imaging.
    Type: Grant
    Filed: November 11, 2019
    Date of Patent: November 30, 2021
    Assignees: KONINKLIJKE PHILIPS N.V., NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK
    Inventors: Gereon Vogtmeier, Dorothee Hermes, Bo Liu, Andre Yaroshenko, Sandeep Unnikrishnan, Johannes Wilhelmus Maria Jacobs
  • Publication number: 20210313086
    Abstract: The invention relates to a method of manufacturing a structured grating, a corresponding structured grating component (1) and an imaging system. The method comprising the steps of: providing (110, 120, 130) a catalyst (30) on a substrate (20), the catalyst (20) having a grating pattern; growing (140) nanostructures (50) on the catalyst (30) so as to form walls (52) and trenches (54) based on the grating pattern; and filling (160) the trenches (54) between the walls (52) of nanostructures (50) using an X-ray absorbing material (70). The invention provides an improved method for manufacturing a structured grating and such structured grating component (1), which is particularly suitable for dark-field X-ray imaging or phase-contrast imaging.
    Type: Application
    Filed: November 11, 2019
    Publication date: October 7, 2021
    Inventors: GEREON VOGTMEIER, DOROTHEE HERMES, BO LIU, ANDRE YAROSHENKO, SANDEEP UNNIKRISHNAN, JOHANNES WILHELMUS MARIA JACOBS
  • Publication number: 20210273230
    Abstract: A substrate comprises carbon nanotubes, oriented largely parallel in a direction away from the substrate. In a plane along a surface of said substrate carbon nanotubes are formed in first cells of a connected structure of carbon nanotubes. Said first cells formed within a second structure of second cells, the carbon nanotubes are thereby patterned in a structure of first cells, nested in a structure of second cells. The first cells comprise at least one opening, without carbon nano tubes, to provide access to the surface of the substrate. Second cells are separated from each other by a trench to prevent carbon nanotubes of a second cell from contacting carbon nanotubes of another second cell across a first gap formed by said trench. The trench provides access to the substrate.
    Type: Application
    Filed: July 10, 2019
    Publication date: September 2, 2021
    Inventors: Evert Jonathan VAN DEN HAM, Lucas Augustinus HAVERKATE, Dorothee Christine HERMES, Michal TULODZIECKI, Sandeep UNNIKRISHNAN
  • Patent number: 11108031
    Abstract: An electrode for a Lithium battery, comprising: a multi-dyad nanolaminate stack formed of a metal oxide layer of the group TiO2, MnO2 or combinations thereof, ranging between 0.3 and 300 nm; separated by a decoupling layer.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: August 31, 2021
    Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
    Inventors: Paulus Willibrordus George Poodt, Sandeep Unnikrishnan, Philippe Vereecken, Sebastien Paul Norbert Moitzheim, Antonius Maria Bernardus van Mol
  • Patent number: 10959693
    Abstract: The present invention relates to a device for aligning an X-ray grating to an X-ray radiation source, the device (10) comprising at least two flat X-ray grating segments (11-19); at least one alignment unit (31-39) for aligning one of the at least two flat X-ray grating segments; wherein the at least two flat X-ray grating segments (11-19) are arranged in juxtaposition and are forming an X-ray grating (20); wherein the at least two flat X-ray grating segments (11-19) each comprise a grating surface (41-49) for X-ray radiation, each grating surface (41-49) comprising a geometrical center; wherein normals (21-29) to each of the grating surfaces (41-49) define a common plane (73), wherein the normals (21-29) intersect the geometrical center of the grating surface (41-49); wherein at least a first of the at least two flat X-ray grating segments (11-19) is rotatable around an axis (131-139) that is perpendicular to the common plane (73); and wherein the first of the at least two flat X-ray grating segments (11-19)
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: March 30, 2021
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Christiaan Kok, Gereon Vogtmeier, Thomas Koehler, Johannes Wilhelmus Maria Jacobs, Sandeep Unnikrishnan, Dorothee Hermes, Antonius Maria Bernardus Van Mol
  • Patent number: 10923724
    Abstract: A method for manufacturing a electronic device is provided having a current collector capable of a high specific charge collecting area and power, but is also achieved using a simple and fast technique and resulting in a robust design that may be flexed and can be manufactured in large scale processing. To this end the electronic device comprising an electronic circuit equipped with a current collector formed by a metal substrate having a face forming a high-aspect ratio structure of pillars having an interdistance larger than 600 nm. By forming the high-aspect structure in a metal substrate, new structures can be formed that are conformal to curvature of a macroform or that can be coiled or wound and have a robust design.
    Type: Grant
    Filed: May 3, 2016
    Date of Patent: February 16, 2021
    Assignee: NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO
    Inventors: Harmannus Franciscus Maria Schoo, Sandeep Unnikrishnan, Dorothee Christine Hermes, Edsger Constant Pieter Smits, Sami Sabik
  • Patent number: 10923729
    Abstract: A method of manufacturing a Lithium battery (100) with a current collector formed of pillars (11) on a substrate face (10), wherein the method comprises: forming elongate and aligned structures forming electrically conductive pillars (11) on the substrate face (10) with upstanding pillar walls extending from a pillar base to a pillar top; wherein the pillars are covered with a laminate comprising a first electrode (12), a solid state electrolyte layer (13); a second electrode layer (14), and a topstrate (20) forming an electrode part; and wherein at least one of the first electrode layer, second electrode layer and topstrate layer is non-conformally coated to prevent Lithium intercalation into the first or second electrode near the pillar base by limiting cracking at the pillar base when volume expansion/contraction of the electrode layers happens during the battery charge/discharge cycles.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: February 16, 2021
    Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
    Inventors: Sandeep Unnikrishnan, Lucas A. Haverkate
  • Publication number: 20210004557
    Abstract: A collimator filter (10) comprises an entry surface (11) to receive incident light (Li, Li?) at different angles of incidence (?i, ?i?) and an exit surface (12) to allow output light (Lo) to exit from the collimator filter (10). A filter structure between the entry surface (11) and the exit surface (12) transmits only parts of the incident light (Li) having angles of incidence (?i) below a threshold angle (?max). The filter structure comprises a patterned array of carbon nanotubes (1), wherein the nanotubes (1) are aligned extending in a principal transmission direction (Z) between the entry surface (11) and the exit surface (12). The nanotubes (1) are arranged to form a two dimensional pattern (P) transverse to the principal transmission direction (Z). Open areas of the pattern (P) without nanotubes (1) form micro-apertures (A) between the nanotubes (1) for transmitting the output light (Lo) through the filter structure.
    Type: Application
    Filed: March 8, 2019
    Publication date: January 7, 2021
    Inventors: Daniel TORDERA SALVADOR, Gerwin Hermanus GELINCK, Sandeep UNNIKRISHNAN, Hylke Broer AKKERMAN, Bart PEETERS, Albert Jos Jan Marie VAN BREEMEN
  • Patent number: 10818927
    Abstract: A method of manufacturing a Lithium battery with a substrate current collector formed of pillars on a substrate face, wherein the method comprises: forming elongate and aligned structures forming electrically conductive pillars on the substrate face with upstanding pillar walls; wherein the pillars are formed with a first electrode, a solid state electrolyte layer provided on the first electrode; and a second electrode layer, wherein the pillars are dimensioned in such a way that adjacent pillars are merged and a topstrate current collector is formed of complementary interspace structures between the merged pillars.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: October 27, 2020
    Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
    Inventors: Lucas Augustinus Haverkate, Sandeep Unnikrishnan, Dorothee Christine Hermes
  • Publication number: 20200297297
    Abstract: The present invention relates to a device for aligning an X-ray grating to an X-ray radiation source, the device (10) comprising at least two flat X-ray grating segments (11-19); at least one alignment unit (31-39) for aligning one of the at least two flat X-ray grating segments; wherein the at least two flat X-ray grating segments (11-19) are arranged in juxtaposition and are forming an X-ray grating (20); wherein the at least two flat X-ray grating segments (11-19) each comprise a grating surface (41-49) for X-ray radiation, each grating surface (41-49) comprising a geometrical center; wherein normals (21-29) to each of the grating surfaces (41-49) define a common plane (73), wherein the normals (21-29) intersect the geometrical center of the grating surface (41-49); wherein at least a first of the at least two flat X-ray grating segments (11-19) is rotatable around an axis (131-139) that is perpendicular to the common plane (73); and wherein the first of the at least two flat X-ray grating segments (11-19)
    Type: Application
    Filed: December 10, 2018
    Publication date: September 24, 2020
    Inventors: CHRISTIAAN KOK, GEREON VOGTMEIER, THOMAS KOEHLER, JOHANNES WILHELMUS MARIA JACOBS, SANDEEP UNNIKRISHNAN, DOROTHEE HERMES, ANTONIUS MARIA BERNARDUS VAN MOL
  • Patent number: 10770756
    Abstract: A method of manufacturing a battery with a substrate current collector, wherein the method comprises: forming elongate and aligned electrically conductive structures on the substrate face with upstanding walls; wherein the walls are formed with a first electrode layer covering said walls, and a solid state electrolyte layer provided on the first electrode layer; and wherein a second electrode layer is formed by covering the electrolyte layer with an electrode layer; and forming a top current collector layer in electrical contact with the second electrode layer, wherein the second electrode layer is shielded from the conductive structure by an insulator covering a part of said conductive structure adjacent an end side thereof.
    Type: Grant
    Filed: June 22, 2017
    Date of Patent: September 8, 2020
    Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
    Inventors: Lucas Augustinus Haverkate, Sandeep Unnikrishnan, Dorothee Christine Hermes
  • Publication number: 20190363337
    Abstract: An electrode for a Lithium battery, comprising: a multi-dyad nanolaminate stack formed of a metal oxide layer of the group TiO2, MnO2 or combinations thereof, ranging between 0.3 and 300 nm; separated by a decoupling layer.
    Type: Application
    Filed: November 27, 2017
    Publication date: November 28, 2019
    Inventors: Paulus Willibrordus George Poodt, Sandeep Unnikrishnan, Philippe Vereecken, Sebastien Paul Norbert Moitzheim, Antonius Maria Bernardus van Mol
  • Patent number: 10381651
    Abstract: An method for manufacturing a electronic device is provided having a current collector capable of a high specific charge collecting area and power, but is also achieved using a simple and fast technique and resulting in a robust design that may be flexed and can be manufactured in large scale processing. To this end the electronic device comprising an electronic circuit equipped with a current collector formed by a metal substrate having a face forming a high-aspect ratio structure of pillars having an interdistance larger than 600 nm. By forming the high-aspect structure in a metal substrate, new structures can be formed that are conformal to curvature of a macroform or that can be coiled or wound and have a robust design.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: August 13, 2019
    Assignees: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO, IMEC vzw
    Inventors: Sandeep Unnikrishnan, Philippe Vereecken
  • Publication number: 20190245239
    Abstract: A method of manufacturing a battery with a substrate current collector, wherein the method comprises: forming elongate and aligned electrically conductive structures on the substrate face with upstanding walls; wherein the walls are formed with a first electrode layer covering said walls, and a solid state electrolyte layer provided on the first electrode layer; and wherein a second electrode layer is formed by covering the electrolyte layer with an electrode layer; and forming a top current collector layer in electrical contact with the second electrode layer, wherein the second electrode layer is shielded from the conductive structure by an insulator covering a part of said conductive structure adjacent an end side thereof.
    Type: Application
    Filed: June 22, 2017
    Publication date: August 8, 2019
    Inventors: Lucas Augustinus Haverkate, Sandeep Unnikrishnan, Dorothee Christine Hermes
  • Patent number: 10297832
    Abstract: A system and method for manufacturing a micropillar array (20). A carrier (11) is provided with a layer of metal ink (20i). A high energy light source (14) irradiates the metal ink (20i) via a mask (13) between the carrier (11) and the light source. The mask is configured to pass a cross-section illuminated image of the micropillar array onto the metal ink (20i), thereby causing a patterned sintering of the metal ink (20i) to form a first subsection layer (21) of the micropillar array (20) in the layer of metal ink (20i). A further layer of the metal ink (20i) is applied on top of the first subsection layer (21) of the micropillar array (20) and irradiated via the mask (13) to form a second subsection layer (21) of the micropillar array on top. The process is repeated to achieve high aspect ratio micropillars 20p.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: May 21, 2019
    Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
    Inventors: Sandeep Unnikrishnan, Rob Jacob Hendriks
  • Publication number: 20180375100
    Abstract: A method of manufacturing a Lithium battery with a substrate current collector formed of pillars on a substrate face, wherein the method comprises: forming elongate and aligned structures forming electrically conductive pillars on the substrate face with upstanding pillar walls; wherein the pillars are formed with a first electrode, a solid state electrolyte layer provided on the first electrode; and a second electrode layer, wherein the pillars are dimensioned in such a way that adjacent pillars are merged and a topstrate current collector is formed of complementary interspace structures between the merged pillars.
    Type: Application
    Filed: December 15, 2016
    Publication date: December 27, 2018
    Inventors: Lucas Augustinus Haverkate, Sandeep Unnikrishnan, Dorothee Christine Hermes
  • Publication number: 20180205089
    Abstract: A method of manufacturing a Lithium battery (100) with a current collector formed of pillars (11) on a substrate face (10), wherein the method comprises: forming elongate and aligned structures forming electrically conductive pillars (11) on the substrate face (10) with upstanding pillar walls extending from a pillar base to a pillar top; wherein the pillars are covered with a laminate comprising a first electrode (12), a solid state electrolyte layer (13); a second electrode layer (14), and a topstrate (20) forming an electrode part; and wherein at least one of the first electrode layer, second electrode layer and topstrate layer is non-conformally coated to prevent Lithium intercalation into the first or second electrode near the pillar base by limiting cracking at the pillar base when volume expansion/contraction of the electrode layers happens during the battery charge/discharge cycles.
    Type: Application
    Filed: July 15, 2016
    Publication date: July 19, 2018
    Inventors: Sandeep Unnikrishnan, Lucas A. Haverkate