公开(公告)号：US20240309725A1

公开(公告)日：2024-09-19

申请号：US18573253

申请日：2022-02-16

申请人： KUREHA CORPORATION

发明人： Ramu MIIKE

IPC分类号： E21B33/12 ,  E21B47/117

CPC分类号： E21B33/1208 ,  E21B47/117 ,  E21B2200/08

摘要： Provided is a downhole plug device that is less likely to hinder other operations after being removed, a fixing method of a tubular body, and an inspection method of a tubular body. In a downhole plug device, a plug that seals one end of a housing having a cylindrical shape is fixed to the housing by a bolt that penetrates through the plug. The downhole plug device is connected to a tip of a tubular body inserted into a casing in a well and is used for a method of inspecting presence or absence of leakage of fluid from the tubular body in the well.

公开(公告)号：US20240243291A1

公开(公告)日：2024-07-18

申请号：US18615055

申请日：2024-03-25

申请人： KUREHA CORPORATION

发明人： Aya SHIKE ,  Yoshiyuki NAGASAWA ,  Tamito IGARASHI

IPC分类号： H01M4/62 ,  H01M10/0565

CPC分类号： H01M4/623 ,  H01M10/0565

摘要： A vinylidene fluoride copolymer composition having stable dispersibility in a dispersion medium over a long period of time, the composition having a melting temperature of 140° C. or lower, a reversing heat flow of the composition has endothermic peaks having an amount of enthalpy of fusion of 2 J/g or more, and an absolute value of a difference between a temperature showing a largest endothermic peak among the endothermic peaks and the melting temperature of the composition is 10° C. or lower. When a dispersion containing butyl butyrate and the vinylidene fluoride copolymer composition (vinylidene fluoride content rate of 10 mass %) is left to stand for 20 hours, a content rate of the vinylidene fluoride copolymer composition in an upper 20 vol % of the dispersion after the dispersion is left to stand is 4.0 mass % or more and 10 mass % or less.

公开(公告)号：US20240215450A1

公开(公告)日：2024-06-27

申请号：US18556601

申请日：2022-04-04

申请人： Kureha Corporation

发明人： Shinji OHISA ,  Makoto IMAJI

IPC分类号： H10N30/09 ,  B60K35/22 ,  H10N30/073 ,  H10N30/857

CPC分类号： H10N30/09 ,  B60K35/22 ,  H10N30/073 ,  H10N30/857 ,  B60K2360/1438

摘要： Provided is a piezoelectric laminated film which does not discolor even under a high-temperature and high-humidity environment. The piezoelectric laminated film includes a piezoelectric film and a transparent adhesive sheet satisfying the following Condition 1. Condition 1: when volatile components obtained from a test piece per 1 cm2 that has been held at 85° C. for 90 minutes are subjected to solid-phase microextraction, adsorbed onto a fiber coated with polydimethylsiloxane, and analyzed by a gas chromatography mass spectrometer, a total amount of organic substances detected after a retention time of 3 minutes is 50 μg or less in terms of weight of 2,2′-azobis(isobutyronitrile).

公开(公告)号：US20240196750A1

公开(公告)日：2024-06-13

申请号：US18555343

申请日：2022-03-22

申请人： Kureha Corporation

发明人： Makoto IMAJI

IPC分类号： H10N30/00 ,  G06F3/041 ,  H10N30/857 ,  H10N30/87

CPC分类号： H10N30/1051 ,  G06F3/0414 ,  H10N30/857 ,  H10N30/877

摘要： Provided is a transparent conductive piezoelectric laminate film that achieves high transparency and low resistance. The present invention relates to a transparent conductive piezoelectric laminate film, wherein a piezoelectric film, a first conductor layer, a metal layer, and a second conductor layer are layered in this order, and the metal layer contains silver or a silver alloy.

公开(公告)号：US20240164218A1

公开(公告)日：2024-05-16

申请号：US18550229

申请日：2022-02-10

申请人： Kureha Corporation

发明人： Makoto IMAJI ,  Kei YAMAGUCHI

IPC分类号： H10N30/50 ,  H10N30/057 ,  H10N30/067 ,  H10N30/87

CPC分类号： H10N30/50 ,  H10N30/057 ,  H10N30/067 ,  H10N30/871 ,  H10N30/878

摘要： A conductive piezoelectric multi-layer film having high transparency is achieved. A conductive piezoelectric multi-layer film is configured such that a first coating layer having a refractive index of 1.45 or greater and less than 1.60, a second coating layer having a refractive index of 1.60 or greater and less than 1.80, and a conductive layer having a refractive index of 1.80 or greater and 2.20 or less are stacked in this order on at least one surface of a piezoelectric film having a refractive index of 1.30 or greater and 1.50 or less.

公开(公告)号：US11898077B2

公开(公告)日：2024-02-13

申请号：US17999493

申请日：2021-02-12

申请人： Kureha Corporation

发明人： Junya Uchida ,  Takumi Katsurao ,  Hiroshi Sakabe

IPC分类号： C09K11/70 ,  C09K11/65 ,  C09K11/02 ,  B82Y30/00 ,  B82Y40/00

CPC分类号： C09K11/70 ,  B82Y30/00 ,  B82Y40/00

摘要： An object is to provide a composition that contains a phosphorus-containing carbon quantum dot and can efficiently emit relatively long wavelength light. The composition to achieve the above object contains: a phosphorus-containing carbon quantum dot containing phosphorus as a heteroatom; and a smectite.

公开(公告)号：US20230422628A1

公开(公告)日：2023-12-28

申请号：US18250483

申请日：2021-10-18

申请人： KUREHA CORPORATION

发明人： Makoto IMAJI

IPC分类号： H10N30/87 ,  H10N30/30 ,  H10N30/857 ,  H10N30/88 ,  H10N30/07

CPC分类号： H10N30/878 ,  H10N30/302 ,  H10N30/857 ,  G06F3/044 ,  H10N30/07 ,  G06F2203/04103 ,  H10N30/883

摘要： To suppress change in a surface resistance value under a high-temperature or high-humidity environment in a transparent conductive piezoelectric film including a transparent piezoelectric film made of a fluororesin. A transparent conductive piezoelectric film includes a transparent piezoelectric film made of a fluororesin, a transparent coating layer, and a transparent electrode stacked in this order. The total thickness of the coating layer is 0.6 to 4.5 μm. When the transparent conductive piezoelectric film is left to stand in a specific high-temperature environment, the ratio of a resistance value after being left in the environment to a ratio of a resistance value before being left in the environment is 1.30 or less.

公开(公告)号：US20230312442A1

公开(公告)日：2023-10-05

申请号：US17757859

申请日：2020-08-13

申请人： Kureha Corporation

发明人： Kensuke SUZUKI ,  Katsumi YOSHIDA ,  Hiraku TOHMIYA

IPC分类号： C07C17/25

CPC分类号： C07C17/25

摘要： An object of the present invention is to provide a method of producing an alkene using a solvent that has little decrease in production rate over time and is easy to recover and recycle.
The method of producing an alkene, which solves the problem, includes: a step of contacting a solution containing an alcohol having three or more carbon atoms and a hydroxide of an alkali metal and/or an alkaline earth metal with a halogenated alkane.

公开(公告)号：US20230271929A1

公开(公告)日：2023-08-31

申请号：US18040365

申请日：2021-08-06

申请人： Kureha Corporation

发明人： Ryo HARIGAE ,  Chiemi KOJIMA ,  Shingo KONNO ,  Toru YAMAZAKI

IPC分类号： C07D301/02 ,  C07D303/48 ,  C07C67/42 ,  C07D249/08

CPC分类号： C07D301/02 ,  C07D303/48 ,  C07C67/42 ,  C07D249/08

摘要： A method by which an intermediate product of an azole derivative can be produced at a lower cost than known production methods is provided. A method for producing a compound represented by General Formula (IV) includes converting a compound represented by General Formula (II) into the compound represented by General Formula (IV) using (a) dimethyl sulfide and/or dimethyl sulfoxide, and (b) a methyl-LG (an LG is a nucleophilically substitutable leaving group and is selected from the group consisting of a halogen group, an alkoxysulfonyloxy group, an aryloxysulfonyloxy group, an alkylsulfonyloxy group, a haloalkylsulfonyloxy group, and an arylsulfonyloxy group) in the presence of an inorganic base.

公开(公告)号：US20230212926A1

公开(公告)日：2023-07-06

申请号：US18006986

申请日：2021-07-09

申请人： Kureha Corporation

发明人： Shinya TAKAHASHI

IPC分类号： E21B34/14 ,  E21B43/26 ,  E21B43/14

CPC分类号： E21B34/142 ,  E21B43/26 ,  E21B43/14

摘要： In a dart for a downhole device according to the present invention, a ball is formed of a first degradable material having a first degradation rate, a mandrel is formed of a second degradable material having a second degradation rate lower than the first degradation rate, and a sleeve is formed of the second degradable material or a third degradable material having a third degradation rate lower than the second degradation rate.