Patents by Inventor Takafumi Sakamoto

Takafumi Sakamoto 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).

  • Patent number: 11452171
    Abstract: According to one embodiment, an electronic apparatus includes a transmitter and a processor. The transmitter transmits a signal to a first electronic apparatus with one of patterns including at least a first pattern which is a first order and which uses first to n-th frequency bands in first to n-th periods and a second pattern which is a second order different from the first order and which uses the first to n-th frequency bands in the first to n-th periods, where n is an integer greater than or equal to two. The processor switches a pattern to be used among the patterns in accordance with a communication situation.
    Type: Grant
    Filed: September 8, 2020
    Date of Patent: September 20, 2022
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Daisuke Uchida, Koji Akita, Takafumi Sakamoto
  • Patent number: 11434370
    Abstract: Provided is a silicone gel composition containing, as essential components: (A) an organopolysiloxane containing an alkenyl group bonded to two or more silicon atoms in one molecule, the organopolysiloxane comprising (a-1) a branched organopolysiloxane having an alkenyl group bonded to three or more silicon atoms only at an end of a molecular chain in one predetermined molecule, and (a-2) a linear organopolysiloxane having an alkenyl group bonded to two or more silicon atoms only at both ends of a molecular chain in one predetermined molecule; (B) a linear organohydrogenpolysiloxane containing hydrogen atoms bonded to two or more silicon atoms in one predetermined molecule; and (C) a platinum-based curing catalyst. Curing the silicone gel can provide a silicone gel cured product which has a degree of penetration of 40-100 as defined according to JIS K2220, has a free oil content of 15 mass % or less, has a low modulus and low stress, and does not exhibit oil bleeding over time.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: September 6, 2022
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tsuyoshi Matsuda, Takafumi Sakamoto
  • Publication number: 20220259432
    Abstract: Provided are an ultraviolet curable organopolysiloxane composition having a favorable ultraviolet curability; and a cured product thereof that has a favorable adhesiveness. The ultraviolet curable organopolysiloxane composition contains: (A) a compound represented by the following general formula (1) wherein R1 represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 20 carbon atoms or an alkoxy group having 1 to 3 carbon atoms, the multiple R1s may be identical to or different from each other, and each R2 independently represents a hydrogen atom, a substituted or unsubstituted monovalent hydrocarbon group having 1 to 20 carbon atoms or a triorganosilyl group; and an ultraviolet curable organopolysiloxane.
    Type: Application
    Filed: June 26, 2020
    Publication date: August 18, 2022
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Misaki TAKAI, Takafumi SAKAMOTO
  • Patent number: 11401419
    Abstract: This dealcoholization room-temperature curable organopolysiloxane composition contains (A) a diorganopolysiloxane having a silicon atom-bonded hydroxy group and/or a hydrolyzable silyl group at both ends of the molecular chain, and has a coefficient of viscosity of 20-1,000,000 mPa·s, (B) an organopolysiloxane which is a partial (co-)hydrolysis-condensation product of a hydrolyzable organosilane compound having one or more silicon atom-bonded alkenyl groups and 1-3 silicon atom-bonded alkoxy groups, per molecule, (C) a hydrolyzable organosilane compound having one or more phenylene backbones and two or more amino groups, per molecule, and/or a partial hydrolysis-condensation product thereof.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: August 2, 2022
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akira Uta, Takafumi Sakamoto
  • Publication number: 20220227996
    Abstract: A room-temperature-vulcanizing (RTV) silicone rubber composition having an organopolysiloxane having a hydrolyzable silyl group at the molecular chain end as a base component (base polymer), used in combination with a lactate silane capable of eliminating a lactic acid ester as a crosslinking agent, and blended with a predetermined curing accelerator, etc. can give a cured product (silicone rubber) that exhibits good moisture resistance as well as excellent safety, adhesiveness, curability, and low odor.
    Type: Application
    Filed: April 24, 2020
    Publication date: July 21, 2022
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akitsugu FUJIWARA, Takafumi SAKAMOTO
  • Publication number: 20220220260
    Abstract: This organopolysiloxane composition, when cured at room temperature by moisture in the atmosphere, provides a silicone rubber cured product having good self-adhesiveness to a magnesium alloy. The organopolysiloxane composition contains (A) an organopolysiloxane having a hydroxy group and/or a hydrolysable silyl group at both ends of the molecular chain, (B) an organic silicon compound other than (A) and (C), having at least three hydrolysable groups bonded to a silicon atom per molecule, and/or a partial hydrolysis-condensation product thereof, and (C) a silane coupling agent having a specific molecular structure having a carboxylic acid silyl ester bond. Furthermore, a novel compound, having an alkoxysilyl group and a carboxylic acid silyl ester group per molecule, can have improved adhesiveness/bonding properties with respect to a base material due to the effect of carboxylic acid after hydrolysis thereof.
    Type: Application
    Filed: March 30, 2022
    Publication date: July 14, 2022
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akira UTA, Takafumi SAKAMOTO
  • Publication number: 20220200711
    Abstract: According to one embodiment, an electronic apparatus includes a processor configured to estimate positions of a plurality of wireless devices from a plurality of position candidates based on position candidate information indicating the plurality of position candidates of the wireless devices, first communication information related to communication using a first electromagnetic wave between the plurality of wireless devices, and second communication information related to communication using a second electromagnetic wave between the plurality of wireless devices.
    Type: Application
    Filed: September 8, 2021
    Publication date: June 23, 2022
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Daisuke UCHIDA, Takafumi SAKAMOTO, Koji AKITA, Yuki YONEZAWA, Yukako TSUTSUMI
  • Publication number: 20220162393
    Abstract: A room-temperature-curable organopolysiloxane composition for an oil seal, wherein an organosilane compound containing a specific organo-oxymethyl group and represented by formula (1) and/or a partial hydrolysis condensate of said compound is used as a curing agent (crosslinking agent), and an organic compound having a guanidine skeleton is added in combination as a curing catalyst. (In the formula, each R1 is independently a C1-12 unsubstituted or substituted monovalent hydrocarbon group, R2 is a C1-12 unsubstituted or substituted monovalent hydrocarbon group, Y is a hydrolyzable group, and n is 0, 1 or 2.) It is thus possible to obtain a cured product having good rubber properties, adhesiveness, and engine oil resistance after curing even without containing a metal-based catalyst.
    Type: Application
    Filed: March 26, 2020
    Publication date: May 26, 2022
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akira UTA, Shigeki YASUDA, Tetsuro YAMADA, Munenao HIROKAMI, Taiki KATAYAMA, Takafumi SAKAMOTO
  • Patent number: 11319413
    Abstract: This organopolysiloxane composition, when cured at room temperature by moisture in the atmosphere, provides a silicone rubber cured product having good self-adhesiveness to a magnesium alloy. The organopolysiloxane composition contains (A) an organopolysiloxane having a hydroxy group and/or a hydrolysable silyl group at both ends of the molecular chain, (B) an organic silicon compound other than (A) and (C), having at least three hydrolysable groups bonded to a silicon atom per molecule, and/or a partial hydrolysis-condensation product thereof, and (C) a silane coupling agent having a specific molecular structure having a carboxylic acid silyl ester bond. Furthermore, a novel compound, having an alkoxysilyl group and a carboxylic acid silyl ester group per molecule, can have improved adhesiveness/bonding properties with respect to a base material due to the effect of carboxylic acid after hydrolysis thereof.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: May 3, 2022
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akira Uta, Takafumi Sakamoto
  • Publication number: 20220106514
    Abstract: This room temperature-curable composition contains: (A) a prescribed polyoxyalkylene compound which has two reactive silicon groups (silyl groups having 1 hydroxy group or 1-3 organo-oxy groups) per molecule, with one reactive silicon group at each molecular chain terminal, and in which the main chain is a prescribed polyoxyalkylene-based polymer; (B) an inorganic filler; (C) a hydrolyzable (organo)silane compound and/or a partial hydrolytic condensation product thereof as a curing agent; (D) a silane coupling agent; and (E) a curing catalyst. Produced by this configuration is a cured product which exhibits excellent silicone oil resistance, excellent curing properties and good elongation and adhesive properties.
    Type: Application
    Filed: January 16, 2020
    Publication date: April 7, 2022
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akira UTA, Taiki KATAYAMA, Takafumi SAKAMOTO
  • Publication number: 20220098371
    Abstract: An organopolysiloxane modified with a lactate silyl at both ends according to the present invention, which is represented by general formula (1) (wherein each of R1, R2 and R3 independently represents an unsubstituted or substituted monovalent hydrocarbon group having 1-10 carbon atoms; m represents an integer of 10 or more; each a independently represents 2 or 3; and X represents an alkylene group having 2-4 carbon atoms or an oxygen atom), is useful as a starting material siloxane for a surface treatment agent for inorganic materials, a coating agent for water repellent treatments, and especially for a room-temperature curable (RTV) silicone rubber composition.
    Type: Application
    Filed: March 26, 2020
    Publication date: March 31, 2022
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Misaki TAKAI, Akitsugu FUJIWARA, Takafumi SAKAMOTO
  • Publication number: 20220077940
    Abstract: An electronic apparatus includes a processor configured to determine, among first wireless communication apparatuses arranged at first positions in an environment, a second wireless communication apparatus and a third wireless communication apparatus based on a fault to be detected in the environment, the third wireless apparatus measuring first information associated with propagation of a radio wave with the second wireless communication apparatus.
    Type: Application
    Filed: February 26, 2021
    Publication date: March 10, 2022
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takafumi SAKAMOTO, Daisuke UCHIDA
  • Publication number: 20220011397
    Abstract: According to one embodiment, an electronic apparatus includes processing circuitry configured to set, based on first information indicating a plurality of candidate positions where a plurality of wireless devices are located, first candidate positions which are part of the plurality of candidate positions, and estimate first wireless devices each located at any of the first candidate positions among the plurality of wireless devices, based on second information regarding communication among the plurality of wireless devices each located at any of the plurality of candidate positions.
    Type: Application
    Filed: September 7, 2021
    Publication date: January 13, 2022
    Applicants: KABUSHIKI KAISHA TOSHIBA, Toshiba Energy Systems & Solutions Corporation
    Inventors: Takafumi SAKAMOTO, Yuki YONEZAWA, Tomohiro TOBARI, Takanori KOUTA
  • Publication number: 20210409908
    Abstract: According to one embodiment, an electronic apparatus includes: processing circuitry configured to generate information regarding distances among a plurality of candidate positions of a plurality of wireless devices based on first information indicating the plurality of candidate positions, and determine a first candidate position from the plurality of candidate positions based on the information regarding the distances among the plurality of candidate positions to acquire identification information of a wireless device which is located on the first candidate position among the plurality of wireless devices.
    Type: Application
    Filed: September 8, 2021
    Publication date: December 30, 2021
    Applicants: KABUSHIKI KAISHA TOSHIBA, Toshiba Energy Systems & Solutions Corporation
    Inventors: Yuki YONEZAWA, Takafumi SAKAMOTO, Tomohiro TOBARI, Takanori KOUTA
  • Publication number: 20210393963
    Abstract: A blood pressure controlling apparatus includes an acquiring part configured to acquire biological information indicating blood pressure of a subject, a producing part configured to produce a frequency modulated pulse train on the basis of the biological information, and a supplying part configured to supply an electrical current on the basis of the frequency modulated pulse train, to an electrode attached on the subject. The electrical current stimulates baroreceptor afferent nerves of the subject.
    Type: Application
    Filed: November 1, 2019
    Publication date: December 23, 2021
    Applicant: Kyushu University, National University Corporation
    Inventors: Keita Saku, Kenji Sunagawa, Takeshi Tohyama, Kazuya Hosokawa, Takafumi Sakamoto
  • Patent number: 11180598
    Abstract: An ultraviolet curable organopolysiloxane composition which contains: (A) a linear or branched organopolysiloxane which contains, as monovalent substituents bonded to a silicon atom at an end of the molecular chain, at least three groups represented by formula (1) and/or formula (2) in each molecule, while having the main chain composed of repeated diorganosiloxane units (in the formulae, a represents a number of 1-3; and the broken line represents a bonding hand); (B) a linear or branched organopolysiloxane which contains at least two groups represented by formula (3) in each molecule, while having the main chain composed of repeated diorganosiloxane units R1bR23-bSi??(3) (in the formula, R1 represents an alkenyl group; R2 represents a monovalent hydrocarbon group; and b represents a number of 1-3); and (C) a photoinitiator.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: November 23, 2021
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tsuyoshi Matsuda, Takafumi Sakamoto
  • Publication number: 20210301066
    Abstract: This room-temperature-curable polybutadiene resin composition contains: (A) a urethane oligomer comprising a condensation polymer of (A1) a polybutadiene having an OH group at both ends of the molecular chain and (A2) a diisocyanate compound; (B) a hydrolysable organosilane compound which, in one molecule, has on average two or more hydrolysable groups bonded to a silicon atom and does not have three or more nitrogen atoms, and/or a partially hydrolysed condensate of said compound; (C) a condensation reaction catalyst; and (D) a hydrolysable organosilane compound which, in one molecule, has three or more nitrogen atoms, and/or a partially hydrolysed condensate of said compound. Said room-temperature-curable polybutadiene resin composition allows a coating film to be obtained, in particular a coating film that is resistant to gas permeation, said coating film therefore being useful as a coating material having properties preventing corrosion by a corrosive gas.
    Type: Application
    Filed: July 10, 2019
    Publication date: September 30, 2021
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akitsugu FUJIWARA, Takafumi SAKAMOTO
  • Publication number: 20210206924
    Abstract: This organopolysiloxane composition, when cured at room temperature by moisture in the atmosphere, provides a silicone rubber cured product having good self-adhesiveness to a magnesium alloy. The organopolysiloxane composition contains (A) an organopolysiloxane having a hydroxy group and/or a hydrolysable silyl group at both ends of the molecular chain, (B) an organic silicon compound other than (A) and (C), having at least three hydrolysable groups bonded to a silicon atom per molecule, and/or a partial hydrolysis-condensation product thereof, and (C) a silane coupling agent having a specific molecular structure having a carboxylic acid silyl ester bond. Furthermore, a novel compound, having an alkoxysilyl group and a carboxylic acid silyl ester group per molecule, can have improved adhesiveness/bonding properties with respect to a base material due to the effect of carboxylic acid after hydrolysis thereof.
    Type: Application
    Filed: October 9, 2018
    Publication date: July 8, 2021
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akira UTA, Takafumi SAKAMOTO
  • Publication number: 20210194423
    Abstract: According to one embodiment, an electronic apparatus includes a processor. The processor is configured to acquire n installation positions where first to n-th pieces of equipment are installed, receive a propagation characteristic related to the first to n-th pieces of equipment, and estimate, by an algorithm, a combination or the first to n-th pieces of equipment and each of the n installation positions based on a propagation characteristic related to the first to n-th pieces of equipment. An initial value of the algorithm is generated based on an arrangement of the n installation positions and an arrangement of the first to n-th pieces of equipment determined based on a propagation characteristic related to the first to n-th pieces of equipment.
    Type: Application
    Filed: March 1, 2021
    Publication date: June 24, 2021
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION
    Inventors: Yuki YONEZAWA, Takafumi SAKAMOTO, Tomohiro TOBARI, Takanori KOUTA
  • Publication number: 20210190927
    Abstract: According to one embodiment, an electronic apparatus includes a processor. The processor is configured to acquire position information indicating first and second installation positions of a plurality of pieces of equipment receive characteristic information of a first piece of equipment obtained from a first propagation characteristic and a second propagation characteristic, and characteristic information of a second piece of equipment obtained from a third propagation characteristic and a fourth propagation characteristic. The processor is configured to estimate a position where each of the first and second pieces of equipment is installed, based on the position information, and the characteristic information of the first and the second piece of equipment.
    Type: Application
    Filed: March 5, 2021
    Publication date: June 24, 2021
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION
    Inventors: Takafumi SAKAMOTO, Yuki YONEZAWA, Tomohiro TOBARI, Takanori KOUTA