Patents by Inventor Katsuhiro Yamanaka

Katsuhiro Yamanaka 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: 11441030
    Abstract: Provided is a resin composition comprising: a polycarbonate resin (A) containing, as main repeating units, a unit (a-1) represented by the following formula (a-1) and a unit (a-2) represented by the following formula (a-2) (wherein, W represents a C1-20 alkylene group or a C6-20 cycloalkylene group, R represents a branched or linear-chain C1-20 alkyl group or a C6-20 cycloalkyl group optionally substituted, and m represents an integer of 0 to 10) and an acrylic resin (B), and the polycarbonate resin and the acrylic resin are in a weight ratio of 40:60 to 99:1, wherein the resin composition has a single glass transition temperature, which is in the range of 90° C. to 150° C., and the resin composition has excellent transparency, chemical resistance, surface hardness and heat resistance, and has a low photoelastic coefficient.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: September 13, 2022
    Assignee: TEIJIN LIMITED
    Inventors: Kenta Imazato, Shoichi Maekawa, Katsuhiro Yamanaka
  • Patent number: 11339285
    Abstract: A multilayer body includes at least one layer (C) including a resin composition; and at least one layer (D) including a thermoplastic resin, in which the resin composition includes a polycarbonate resin (A) and an acrylic resin (B) in a weight ratio of 40:60 to 99:1, the polycarbonate resin (A) includes, as main repeating units, a unit (a-1) represented by the following formula (a-1): and a unit (a-2) represented by the following formula (a-2): wherein W represents an alkylene group having 1 to 20 carbon atoms or a cycloalkylene group having 6 to 20 carbon atoms, R represents a branched or linear alkyl group having 1 to 20 carbon atoms, or a cycloalkyl group having 6 to 20 carbon atoms and optionally having a substituent, and m represents an integer of 0 to 10, and the molar ratio of the unit (a-1) and the unit (a-2) (a-1/a-2) is 40/60 to 95/5. The multilayer body has excellent transparency, chemical resistance, surface hardness, and adhesion.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: May 24, 2022
    Assignee: TEIJIN LIMITED
    Inventors: Kenta Imazato, Shoichi Maekawa, Katsuhiro Yamanaka
  • Patent number: 11285710
    Abstract: A multilayer body includes at least one layer (A) made of a polycarbonate resin (A) whose main repeating units include a unit (a-1) composed of an ether diol residue represented by the following formula (1) and a unit (a-2) composed of a diol residue represented by the following formula (2), and at least one layer (B) containing an aromatic polycarbonate resin (B), wherein the molar ratio of the unit (a-1) is 50 to 96 mol % and the molar ratio of the unit (a-2) is 4 to 50 mol %, with respect to 100 mol % of the total repeating units of the polycarbonate resin (A) and the proportion of the aromatic polycarbonate resin (B) in the layer (B) containing an aromatic polycarbonate resin (B) is 30% by weight or more, and the multilayer body is excellent in heat resistance, impact resistance, surface hardness, adhesion, and chemical resistance.
    Type: Grant
    Filed: December 12, 2018
    Date of Patent: March 29, 2022
    Assignee: TEIJIN LIMITED
    Inventors: Tomohiro Nakazaki, Kenta Imazato, Katsuhiro Yamanaka
  • Publication number: 20210393607
    Abstract: Disclosed is a patch containing a plaster having fentanyl, an adhesive, a volatile hydrocarbon solvent (A), and a heteroatom-containing volatile organic solvent (B).
    Type: Application
    Filed: November 7, 2019
    Publication date: December 23, 2021
    Applicant: MEDRX CO., LTD.
    Inventors: Katsuhiro Yamanaka, Hidetoshi Hamamoto, Yasushi Miwa
  • Patent number: 11198759
    Abstract: The present invention provides a polycarbonate copolymer having low specific gravity and high surface hardness.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: December 14, 2021
    Assignee: TEIJIN LIMITED
    Inventors: Hideyuki Tsunemori, Kenta Imazato, Katsuhiro Yamanaka
  • Publication number: 20210353539
    Abstract: The purpose of the present invention is to provide an aqueous preparation for external use, said aqueous preparation comprising an acidic drug such as an arylacetic acid nonsteroidal anti-inflammatory analgesic, having an excellent percutaneous absorbability and giving a good feeling in use. The aqueous preparation for external use comprises the acidic drug or a salt thereof, isostearic acid and an alkanol amine. It is preferred that the aqueous preparation according to the present invention for external use further comprises a C2-6 aliphatic hydroxy acid and has a pH value of 4.5-7.8. The C2-6 aliphatic hydroxy acid is one member or a combination of the same selected from the group consisting of lactic acid, glycolic acid, malic acid, tartaric acid and citric acid.
    Type: Application
    Filed: July 21, 2021
    Publication date: November 18, 2021
    Applicant: MEDRx Co., Ltd.
    Inventor: Katsuhiro Yamanaka
  • Publication number: 20210346311
    Abstract: The present invention provides a composition for a non-aqueous patch preparation having an excellent adhesibility which can sustainedly release a drug. The patch preparation of the present invention can improve the adhesibility thereof as well as the release property of a drug by the addition of powder ingredient (e.g. a filler). As a result, the long-time sustention of the adhesibility of patch preparations can achieve the improvement of the transdermal absorbability and the sustained release of a drug. By the use of a composition for a patch preparation comprising this powder ingredient, a drug, regardless of the type of a drug is dissolved in an organic solvent or an ionic liquid to prepare a drug solution comprising the organic solvent, the drug solution is incorporated into the non-aqueous patch preparation of the present invention, and thereby a preparation with the improved transdermal-absorbability and sustained release can prepared.
    Type: Application
    Filed: March 19, 2021
    Publication date: November 11, 2021
    Applicant: MEDRX CO., LTD.
    Inventors: Hidetoshi Hamamoto, Katsuhiro Yamanaka, Takahiro Tanimoto
  • Patent number: 11090265
    Abstract: The purpose of the present invention is to provide an aqueous preparation for external use, said aqueous preparation comprising an acidic drug such as an arylacetic acid nonsteroidal anti-inflammatory analgesic, having an excellent percutaneous absorbability and giving a good feeling in use. The aqueous preparation for external use comprises the acidic drug or a salt thereof, isostearic acid and an alkanol amine. It is preferred that the aqueous preparation according to the present invention for external use further comprises a C2-6 aliphatic hydroxy acid and has a pH value of 4.5-7.8. The C2-6 aliphatic hydroxy acid is one member or a combination of the same selected from the group consisting of lactic acid, glycolic acid, malic acid, tartaric acid and citric acid.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: August 17, 2021
    Assignee: MEDRX CO., LTD.
    Inventor: Katsuhiro Yamanaka
  • Publication number: 20210047463
    Abstract: A polycarbonate resin containing a structural unit originating from a dihydroxy compound represented by formula (1), having a boric-acid content of 100 ppm or lower and/or a tertiary-amine content of 1000 ppm by weight or lower, and having a terminal phenyl group originating from a diester carbonate represented by formula (2), wherein the concentration of the terminal phenyl group is equal to or greater than 30 ?eq/g. In formula (1), R1, R2, R3, and R4 each independently represent a hydrogen atom, a C1-C10 alkyl group, a C1-C10 alkoxy group, a C3-C20 cycloalkyl group, a C6-C20 cycloalkoxy group, a C6-C10 aryl group, a C7-C20 aralkyl group, a C6-C10 aryloxy group, a C7-C20 aralkyloxy group, or a halogen atom, and the cyclobutane ring indicates a cis-trans isomer mixture, a cis isomer alone, or a trans isomer alone. In formula (2), R5 and R6 each independently represent a substituted or non-substituted aromatic group.
    Type: Application
    Filed: February 22, 2019
    Publication date: February 18, 2021
    Applicant: TEIJIN LIMITED
    Inventors: Hideyuki TSUNEMORI, Kenta IMAZATO, Takeshi FURUNO, Katsuhiro YAMANAKA
  • Patent number: 10919923
    Abstract: An organic phosphorus-based compound which satisfies the following requirements (i) to (viii) and is represented by the following formula (1): (i) the organic purity should be not lower than 98%; (ii) the solubility in 20° C. water should be not higher than 0.1 g/100 g of water; (iii) the total halogen component content should be not higher than 1,000 ppm; (iv) the total volatile organic matter content should be not higher than 800 ppm; (v) the ? pH value should be not larger than 1.0; (vi) the volume standard median diameter should be not larger than 30 ?m; (vii) the maximum particle diameter should be not larger than 200 ?m; and (viii) the standard deviation represented by the following formula should be not larger than 20 ?m. Standard deviation=(d84%+d16%)/2; wherein d84%: particle diameter at a point where the cumulative curve becomes 84% (?m), and d16%: particle diameter at a point where the cumulative curve becomes 16% (?m).
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: February 16, 2021
    Assignee: TEIJIN LIMITED
    Inventors: Katsuhiro Yamanaka, Kenta Imazato, Naoshi Takahashi
  • Publication number: 20200407498
    Abstract: The purpose of the present invention is to provide: a novel polymer which has an electro-optical effect; a method for producing such a polymer; and a light control element which uses such a polymer. The present invention relates to a non-crosslinkable polycarbonate which contains a moiety that has electro-optical characteristics. The present invention also relates to a method for producing a polycarbonate, which comprises a step for reacting a bisphenol compound, a diol compound that has electro-optical characteristics, and a phosgene in the presence of an acid binding agent and solvent. The present invention also relates to a light control element which comprises such polycarbonate.
    Type: Application
    Filed: March 1, 2019
    Publication date: December 31, 2020
    Applicants: TEIJIN LIMITED, NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY
    Inventors: Naoshi TAKAHASHI, Katsuhiro YAMANAKA, Akira OTOMO, Toshiki YAMADA
  • Patent number: 10800879
    Abstract: To provide a polycarbonate resin having an excellent hue and high heat stability, and a production method and a film thereof. The polycarbonate resin has a carbonate constituent unit represented by the following formula (A), wherein the resin contains a terminal group represented by the following formula (1) or (2) and 0.1 to 500 ppm of an aromatic monohydroxy compound. (In the formula (1), R1 is an alkyl group having 6 to 15 carbon atoms which may be substituted.) (In the formula (2), R2 and R3 are each independently an alkylene group having 1 to 12 carbon atoms which may be substituted. R4 is a hydrogen atom or alkyl group having 1 to 12 carbon atoms which may be substituted. n is an integer of 1 to 20.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: October 13, 2020
    Assignee: TEIJIN LIMITED
    Inventors: Tetsuya Motoyoshi, Katsuhiro Yamanaka
  • Publication number: 20200316928
    Abstract: A multilayer body includes at least one layer (A) made of a polycarbonate resin (A) whose main repeating units include a unit (a-1) composed of an ether diol residue represented by the following formula (1) and a unit (a-2) composed of a diol residue represented by the following formula (2), and at least one layer (B) containing an aromatic polycarbonate resin (B), wherein the molar ratio of the unit (a-1) is 50 to 96 mol % and the molar ratio of the unit (a-2) is 4 to 50 mol %, with respect to 100 mol % of the total repeating units of the polycarbonate resin (A) and the proportion of the aromatic polycarbonate resin (B) in the layer (B) containing an aromatic polycarbonate resin (B) is 30% by weight or more, and the multilayer body is excellent in heat resistance, impact resistance, surface hardness, adhesion, and chemical resistance.
    Type: Application
    Filed: December 12, 2018
    Publication date: October 8, 2020
    Applicant: TEIJIN LIMITED
    Inventors: Tomohiro NAKAZAKI, Kenta IMAZATO, Katsuhiro YAMANAKA
  • Publication number: 20200283571
    Abstract: The present invention provides a polycarbonate copolymer having low specific gravity and high surface hardness.
    Type: Application
    Filed: June 20, 2018
    Publication date: September 10, 2020
    Applicant: TeiJin Limited
    Inventors: Hideyuki TSUNEMORI, Kenta IMAZATO, Katsuhiro YAMANAKA
  • Patent number: 10543275
    Abstract: The present disclosure provides a composition for a non-aqueous patch preparation with excellent adhesibility which can sustainedly release a drug. The patch preparation can improve the adhesibility of the patch preparation and the release property of a drug by the addition of a powder ingredient the long-time sustention of the adhesibility of tape preparations enables an improvement of the transdermal absorbability and the sustained release of a drug.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: January 28, 2020
    Assignee: MEDRX CO., LTD.
    Inventors: Hidetoshi Hamamoto, Katsuhiro Yamanaka, Takahiro Tanimoto
  • Publication number: 20200000738
    Abstract: The present invention provides a composition for a non-aqueous patch preparation having an excellent adhesibility which can sustainedly release a drug. The patch preparation of the present invention can improve the adhesibility thereof as well as the release property of a drug by the addition of powder ingredient (e.g. a filler). As a result, the long-time sustention of the adhesibility of patch preparations can achieve the improvement of the transdermal absorbability and the sustained release of a drug. By the use of a composition for a patch preparation comprising this powder ingredient, a drug, regardless of the type of a drug is dissolved in an organic solvent or an ionic liquid to prepare a drug solution comprising the organic solvent, the drug solution is incorporated into the non-aqueous patch preparation of the present invention, and thereby a preparation with the improved transdermal-absorbability and sustained release can prepared.
    Type: Application
    Filed: September 10, 2019
    Publication date: January 2, 2020
    Applicant: MEDRX CO., LTD.
    Inventors: Hidetoshi Hamamoto, Katsuhiro Yamanaka, Takahiro Tanimoto
  • Publication number: 20190388544
    Abstract: The object of the present invention is to provide a composition for a non-aqueous patch preparation with excellent adhesibility which can sustainedly release a drug. The patch preparation of the present invention can improve the adhesibility of the patch preparation and the release property of a drug by the addition of a powder ingredient (a filler or the like). As a result, the long-time sustention of the adhesibility of tape preparations enables an improvement of the transdermal absorbability and the sustained release of a drug. By the use of a composition for a patch preparation comprising this powder ingredient, a drug, regardless of the type of a drug is dissolved in an organic solvent or an ionic liquid to prepare a drug solution comprising the organic solvent, the drug solution is incorporated into the non-aqueous patch preparation of the present invention, and thereby a preparation with the improved transdermal absorbability and the improved sustained release can prepared.
    Type: Application
    Filed: September 9, 2019
    Publication date: December 26, 2019
    Applicant: MEDRX CO., LTD.
    Inventors: Hidetoshi Hamamoto, Katsuhiro Yamanaka, Takahiro Tanimoto
  • Publication number: 20190390006
    Abstract: The purpose of the present invention is to provide a polycarbonate resin which has excellent scratch resistance, shock resistance, thermal resistance, and amine resistance. The present invention is a polycarbonate copolymer comprising, as main structural units: (A) a structural unit (A) represented by formula (1) [formula 1] (in formula (1), R1 and R2 are each independently a hydrogen atom, a hydrocarbon group having 1 to 9 carbon atoms which may include an aromatic group, or a halogen atom); (B) a structural unit (B) represented by formula (2) [formula 2] (in formula (2), R3 and R4 are each independently an alkyl group having 1 to 6 carbon atoms or a halogen atom.
    Type: Application
    Filed: December 22, 2017
    Publication date: December 26, 2019
    Applicant: Teijin Limited
    Inventors: Hideyuki TSUNEMORI, Katsuhiro YAMANAKA
  • Patent number: 10494506
    Abstract: Provided is a flame-retardant polyolefin resin composition, which contains 1 to 100 parts by weight of an organic phosphorus compound (component B) represented by the following formula (1) per 100 parts by weight of the polyolefin resin (component A), realizing high flame retardancy, high heat resistance and excellent physical properties. wherein X1 and X2, which may be the same or different, are aromatic-substituted alkyl groups, represented by the following formula (2): ALAr)n??(2) wherein AL is a branched or linear aliphatic hydrocarbon group having 1 to 5 carbon atoms, Ar is a phenyl group, a naphthyl group, or an anthryl group optionally having a substituent in an aromatic ring, n represents an integer of 1 to 3, and Ar can be bonded to any carbon atom in AL.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: December 3, 2019
    Assignee: TEIJIN LIMITED
    Inventors: Katsuhiro Yamanaka, Tsuyoshi Takeda
  • Patent number: 10494522
    Abstract: A polycarbonate copolymer or copolymerized polycarbonate blend having excellent amine resistance, which has, as main constituent units, (A) constituent units each represented by the following formula (1): wherein, in the formula (1), each of R1 and R2 is independently a hydrogen atom, a hydrocarbon group having 1 to 9 carbon atoms and optionally containing an aromatic group, or a halogen atom, (B) constituent units each represented by the following formula (2): wherein, in the formula (2), each of R3 and R4 is independently an alkyl group having 1 to 6 carbon atoms or a halogen atom, and X is a single bond, a substituted or unsubstituted alkylene group, a substituted or unsubstituted alkylidene group, a sulfur atom, or an oxygen atom, and (C) constituent units each represented by the following formula (3): wherein, in the formula (3), W represents a single bond, a substituted or unsubstituted alkylene group, a substituted or unsubstituted alkylidene group, a sulfur atom, or an oxygen
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: December 3, 2019
    Assignee: TEIJIN LIMITED
    Inventors: Hideyuki Tsunemori, Katsuhiro Yamanaka