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公开(公告)号：US11104840B2
公开(公告)日：2021-08-31
申请号：US15545446
申请日：2016-02-04
Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.
Inventor： Seishi Yoshikawa , Tsutaki Katayama
Abstract: A method of extracting underground resources including a step of mixing hydrolysable particles and a proppant to an aqueous dispersion fluid, and introducing the fluid with pressure into an ore chute formed under the ground, wherein as the hydrolysable particles, use is made of spherical particles that include a hydrolysable resin of a weight average molecular weight (Mw) of not less than 5,000 and, specifically, not less than 10,000, and that have an average particle size (D50) in a range of 300 to 1,000 μm, and a circularity of a short diameter/long diameter ratio of not less than 0.8. The spherical particles have a hyrolysable capability, a circularity and a particle size adapted to the hydraulic fracturing.
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公开(公告)号：US10246625B2
公开(公告)日：2019-04-02
申请号：US15208164
申请日：2016-07-12
Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.
Inventor： Seishi Yoshikawa
Abstract: A method of extracting underground natural resources through an ore chute located in a temperature region where temperature in the ground is not higher than 60° C., comprising introducing a dispersion solution obtained by dispersing polyoxaylate in water into the ore chute with pressure to hydrolyze the polyoxalate.
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公开(公告)号：US10040983B2
公开(公告)日：2018-08-07
申请号：US14649947
申请日：2013-12-12
Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.
Inventor： Seishi Yoshikawa , Tsutaki Katayama
Abstract: A dispersion solution for drilling obtained by dispersing, in an aqueous medium, a hydrolysable resin material that contains a resin that is hydrolysable but sparingly and a hydrolysable resin that accelerates the decomposition of esters. The dispersion solution for drilling exhibits a highly hydrolysable capability despite of using an inexpensive hydrolysable resin material, and can be favorably used for extracting resources relying on a well drilling method such as hydraulic fracturing method, rotary drilling method or riserless drilling method.
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Patent Agency Ranking
公开(公告)号：US12221532B2
公开(公告)日：2025-02-11
申请号：US17763946
申请日：2020-09-03
Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.
Inventor： Seishi Yoshikawa , Koki Shibata , Atsushi Ebata , Takayuki Ishihara
Abstract: A propylene-based resin composition including an impact polypropylene component (A), and a linear low-density polyethylene component (B) containing methylpentene as a comonomer, the composition being characterized by containing a xylene-soluble fraction in an amount of 8 mass % or higher, and having an intrinsic viscosity measured for the xylene-soluble fraction is in a range from 1.0 to 2.9 dL/g.
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公开(公告)号：US11148402B2
公开(公告)日：2021-10-19
申请号：US17269379
申请日：2019-08-30
Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.
Inventor： Yuuki Tashiro , Takayuki Ishihara , Azusa Otsuki , Kenji Ichikawa , Toshiki Yamada , Seishi Yoshikawa , Koki Shibata
Abstract: A multilayer container including: an outermost layer (1) containing a propylene-based polymer A containing homopolypropylene as a main component having a melt flow rate in a range of 2.0 to 10.0 g/10 min; an inner layer (2) containing 50 to 99% by weight of a propylene-based polymer B containing homopolypropylene as a main component having a melt flow rate of not more than 5.0 g/10 min and an isotactic index of not less than 93%, and 1 to 50% by weight of an ethylene-α-olefin copolymer C; and a barrier layer (4) occupying 5 to 20% by weight of the whole container. The ratio (L/D) of container height (L) to diameter (D) is not less than 0.5, and a volume shrinkage based on volume measured before and after heat sterilization at 121° C. for 30 minutes is not more than 5%.
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公开(公告)号：US10385171B2
公开(公告)日：2019-08-20
申请号：US15508997
申请日：2015-08-11
Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.
Inventor： Seishi Yoshikawa , Toshiki Yamada , Tsutaki Katayama
IPC: C08J3/12 , C08L67/04 , C09K8/035 , C08K5/11 , C08L101/16 , C09K8/508 , C09K8/516 , C09K8/68 , C09K8/70 , C09K8/88 , C09K8/92 , E21B43/16
Abstract: A powder comprising hydrolyzable resin particle, containing particles which do not pass through a sieve having an opening size of 500 μm in an amount of 50 mass % or more and having a repose angle of 51° or more. This powder is preferably used as an additive for drilling to enhance the drilling properties of a drilling fluid and improve the retentivity of a fracture extending from a winze.
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公开(公告)号：US12084541B2
公开(公告)日：2024-09-10
申请号：US17598355
申请日：2020-03-30
Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.
Inventor： Tsutaki Katayama , Seishi Yoshikawa , Koki Shibata
Abstract: A polylactic acid solid composition includes: a polylactic acid having a weight average molecular weight of not more than 40,000, which is measured in terms of polystyrene standard by GPC; and a basic compound of an alkali metal or an alkaline earth metal, which is a residue of a molecular weight reduction accelerator. The basic compound is contained in an amount in a range of 0.5 to 20 mass %.
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8.发明申请BIODEGRADABLE RESIN COMPOSITION HAVING A POROUS STRUCTURE AND METHOD FOR SURFACE TREATMENT OF SAME 审中-公开具有多孔结构的生物可降解树脂组合物及其表面处理方法公开(公告)号：US20160208062A1
公开(公告)日：2016-07-21
申请号：US14917509
申请日：2014-09-10
Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.
Inventor： Tsutaki Katayama , Seishi Yoshikawa
IPC: C08J7/00 , C08L101/16 , C08K5/00
CPC classification number: C08J7/00 , C08J5/00 , C08J7/14 , C08J2300/16 , C08J2367/04 , C08J2467/02 , C08K5/0033 , C08K5/09 , C08L67/04 , C08L101/00 , C08L101/16 , C08L67/02
Abstract: The present invention relates to a formed biodegradable resin article having a porous structure in the biodegradable resin composition of the surface portion and an ester degradation accelerator dispersed in the biodegradable resin composition of the inner portion.
Abstract translation: 本发明涉及在表面部分的生物降解性树脂组合物中具有多孔结构的成型生物降解性树脂制品和分散在内部的生物降解性树脂组合物中的酯降解促进剂。
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