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Patents Grants
last 30 patents
Information
Patent Grant
Composition, composition for downhole tools, degradable rubber memb...
Patent number
10,829,614
Issue date
Nov 10, 2020
Kureha Corporation
Takuma Kobayashi
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Composition, composition for downhole tools, degradable rubber memb...
Patent number
10,815,362
Issue date
Oct 27, 2020
Kureha Corporation
Takuma Kobayashi
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Stock shape for downhole tool component, downhole tool component, a...
Patent number
10,738,561
Issue date
Aug 11, 2020
Kureha Corporation
Fuminori Kobayashi
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Plug for well drilling provided with diametrically expandable annul...
Patent number
10,619,084
Issue date
Apr 14, 2020
Kureha Corporation
Masayuki Okura
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Rubber member for downhole tools, downhole tool, and method for rec...
Patent number
10,414,851
Issue date
Sep 17, 2019
Kureha Corporation
Takeo Takahashi
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Degradable rubber member for downhole tools, degradable seal member...
Patent number
10,280,699
Issue date
May 7, 2019
Kureha Corporation
Takeo Takahashi
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Diameter-expandable annular degradable seal member for downhole too...
Patent number
10,208,559
Issue date
Feb 19, 2019
Kureha Corporation
Takeo Takahashi
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Poly-L-lactic acid solid-state extrusion molded article, method for...
Patent number
10,072,476
Issue date
Sep 11, 2018
Kureha Corporation
Masayuki Okura
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Solidification- and extrusion-molded article of polyglycolic acid a...
Patent number
10,030,465
Issue date
Jul 24, 2018
Kureha Corporation
Masayuki Okura
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Molded product having effective thickness of 1 mm or more and conta...
Patent number
9,926,764
Issue date
Mar 27, 2018
Kureha Corporation
Takuma Kobayashi
E21 - EARTH DRILLING MINING
Information
Patent Grant
Ball sealer for hydrocarbon resource recovery, method for manufactu...
Patent number
9,914,871
Issue date
Mar 13, 2018
Kureha Corporation
Masayuki Okura
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Degradable fiber for use in well treatment fluid, method for manufa...
Patent number
9,902,897
Issue date
Feb 27, 2018
Kureha Corporation
Takeo Takahashi
D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information
Patent Grant
Well treatment method by disintegrating elastic material by contact...
Patent number
9,879,500
Issue date
Jan 30, 2018
Kureha Corporation
Masayuki Okura
E21 - EARTH DRILLING MINING
Information
Patent Grant
Plug for well drilling process provided with mandrel formed from de...
Patent number
9,714,551
Issue date
Jul 25, 2017
Kureha Corporation
Masayuki Okura
E21 - EARTH DRILLING MINING
Information
Patent Grant
Polyglycolic acid resin short fibers for use in well treatment fluid
Patent number
9,534,163
Issue date
Jan 3, 2017
Kureha Corporation
Shunsuke Abe
D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information
Patent Grant
Carbon dioxide recovery method and carbon-dioxide-recovery-type ste...
Patent number
9,416,683
Issue date
Aug 16, 2016
Kabushiki Kaisha Toshiba
Yuya Murakami
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Grant
Vinylidene fluoride resin porous film and manufacturing method ther...
Patent number
9,095,824
Issue date
Aug 4, 2015
Kureha Corporation
Yasuhiro Tada
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Vinylidene fluoride resin porous membrane, manufacturing method the...
Patent number
9,096,957
Issue date
Aug 4, 2015
Kureha Corporation
Yasuhiro Tada
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Ni-base alloy for turbine rotor of steam turbine and turbine rotor...
Patent number
8,828,313
Issue date
Sep 9, 2014
Kabushiki Kaisha Toshiba
Kuniyoshi Nemoto
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Carbon dioxide recovery method and carbon-dioxide-recovery-type ste...
Patent number
8,726,662
Issue date
May 20, 2014
Kabushiki Kaisha Toshiba
Yuya Murakami
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Grant
Carbon dioxide recovery method and carbon-dioxide-recovery-type ste...
Patent number
8,720,203
Issue date
May 13, 2014
Kabushiki Kaisha Toshiba
Takeshi Sasanuma
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Grant
Carbon dioxide recovery method and carbon-dioxide-recovery-type ste...
Patent number
8,707,700
Issue date
Apr 29, 2014
Kabushiki Kaisha Toshiba
Takeshi Sasanuma
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Grant
Semiconductor memory device
Patent number
8,154,944
Issue date
Apr 10, 2012
Oki Semiconductor Co., Ltd.
Takeo Takahashi
G11 - INFORMATION STORAGE
Information
Patent Grant
Steam turbine power plant
Patent number
7,850,424
Issue date
Dec 14, 2010
Kabushiki Kaisha Toshiba
Seiko Takahashi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Porous water filtration membrane of vinylidene fluoride resin hollo...
Patent number
7,780,014
Issue date
Aug 24, 2010
Kureha Corporation
Yasuhiro Tada
D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information
Patent Grant
Steam turbine
Patent number
7,651,318
Issue date
Jan 26, 2010
Kabushiki Kaisha Toshiba
Takeo Suga
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Semiconductor memory device
Patent number
7,643,367
Issue date
Jan 5, 2010
Oki Semiconductor Co., Ltd.
Takeo Takahashi
G11 - INFORMATION STORAGE
Information
Patent Grant
Resin compositions, monofilaments, process for producing the same a...
Patent number
7,582,353
Issue date
Sep 1, 2009
Kureha Corporation
Satoshi Hashimoto
A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information
Patent Grant
Vinylidene fluoride based resin porous hollow yarn and method for p...
Patent number
7,569,145
Issue date
Aug 4, 2009
Kureha Corporation
Yasuhiro Tada
D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information
Patent Grant
Steam turbine power plant
Patent number
7,484,926
Issue date
Feb 3, 2009
Kabushiki Kaisha Toshiba
Takeo Suga
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Patents Applications
last 30 patents
Information
Patent Application
METHOD FOR PRODUCING RUBBER MEMBER FOR DOWNHOLE TOOL
Publication number
20190382520
Publication date
Dec 19, 2019
Kureha Corporation
TAKEO TAKAHASHI
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Application
COMPOSITION, COMPOSITION FOR DOWNHOLE TOOLS, DEGRADABLE RUBBER MEMB...
Publication number
20190300676
Publication date
Oct 3, 2019
Kureha Corporation
Takuma KOBAYASHI
E21 - EARTH DRILLING MINING
Information
Patent Application
STOCK SHAPE FOR DOWNHOLE TOOL COMPONENT, DOWNHOLE TOOL COMPONENT, A...
Publication number
20190017346
Publication date
Jan 17, 2019
Kureha Corporation
FUMINORI KOBAYASHI
B22 - CASTING POWDER METALLURGY
Information
Patent Application
COMPOSITION, COMPOSITION FOR DOWNHOLE TOOLS, DEGRADABLE RUBBER MEMB...
Publication number
20190002667
Publication date
Jan 3, 2019
Kureha Corporation
Takuma KOBAYASHI
E21 - EARTH DRILLING MINING
Information
Patent Application
SOLIDIFICATION- AND EXTRUSION-MOLDED ARTICLE OF POLYGLYCOLIC ACID A...
Publication number
20180291702
Publication date
Oct 11, 2018
Kureha Corporation
Masayuki Okura
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Application
COMPOSITION FOR WELL DRILLING COMPRISING REACTIVE METAL AND DEGRADA...
Publication number
20180187060
Publication date
Jul 5, 2018
Kureha Corporation
Masayuki OKURA
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Application
DOWNHOLE TOOL CONTAINING DOWNHOLE-TOOL MEMBER CONTAINING REACTIVE M...
Publication number
20170284167
Publication date
Oct 5, 2017
Kureha Corporation
Takeo TAKAHASHI
B32 - LAYERED PRODUCTS
Information
Patent Application
PLUG FOR WELL DRILLING PROVIDED WITH RING-SHAPED RATCHET STRUCTURE
Publication number
20170218720
Publication date
Aug 3, 2017
Kureha Corporation
TAKEO TAKAHASHI
E21 - EARTH DRILLING MINING
Information
Patent Application
MOLDED PRODUCT HAVING EFFECTIVE THICKNESS OF 1 mm OR MORE AND CONTA...
Publication number
20170175481
Publication date
Jun 22, 2017
Kureha Corporation
Takuma KOBAYASHI
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Application
PLUG FOR WELL DRILLING PROVIDED WITH DIAMETRICALLY EXPANDABLE ANNUL...
Publication number
20170158942
Publication date
Jun 8, 2017
Kureha Corporation
MASAYUKI OKURA
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Application
WELL TREATMENT METHOD BY DISINTEGRATING ELASTIC MATERIAL BY CONTACT...
Publication number
20170015900
Publication date
Jan 19, 2017
Kureha Corporation
MASAYUKI OKURA
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Application
DEGRADABLE RUBBER MEMBER FOR DOWNHOLE TOOLS, DEGRADABLE SEAL MEMBER...
Publication number
20170016298
Publication date
Jan 19, 2017
Kureha Corporation
TAKEO TAKAHASHI
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Application
BALL SEALER FOR HYDROCARBON RESOURCE RECOVERY, METHOD FOR MANUFACTU...
Publication number
20160312111
Publication date
Oct 27, 2016
Kureha Corporation
Masayuki Okura
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Application
TEMPORARY PLUGGING AGENT FOR WELL DRILLING
Publication number
20160298017
Publication date
Oct 13, 2016
Kureha Corporation
TAKEO TAKAHASHI
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Application
DIAMETER-EXPANDABLE ANNULAR DEGRADABLE SEAL MEMBER FOR DOWNHOLE TOO...
Publication number
20160298415
Publication date
Oct 13, 2016
Kureha Corporation
TAKEO TAKAHASHI
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Application
PLUG FOR WELL DRILLING PROVIDED WITH RING-SHAPED RATCHET STRUCTURE
Publication number
20160298407
Publication date
Oct 13, 2016
KUREHA CORPORATION
TAKEO TAKAHASHI
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Application
DOWNHOLE TOOL OR DOWNHOLE TOOL MEMBER, DEGRADABLE RESIN COMPOSITION...
Publication number
20160290083
Publication date
Oct 6, 2016
Kureha Corporation
TAKEO TAKAHASHI
E21 - EARTH DRILLING MINING
Information
Patent Application
DEGRADABLE SEAL MEMBER FOR DOWNHOLE TOOLS, DOWNHOLE TOOL, AND METHO...
Publication number
20160290091
Publication date
Oct 6, 2016
KUREHA CORPORATION
TAKEO TAKAHASHI
E21 - EARTH DRILLING MINING
Information
Patent Application
PLUG FOR WELL DRILLING
Publication number
20160237774
Publication date
Aug 18, 2016
KUREHA CORPORATION
MASAYUKI OKURA
E21 - EARTH DRILLING MINING
Information
Patent Application
ACID CURING AGENT INCLUSION AND METHOD FOR PRODUCING ACID CURING AG...
Publication number
20160168450
Publication date
Jun 16, 2016
Kureha Corporation
Takuma Kobayashi
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Application
RUBBER MEMBER FOR DOWNHOLE TOOLS, DOWNHOLE TOOL, AND METHOD FOR REC...
Publication number
20160108165
Publication date
Apr 21, 2016
Kureha Corporation
TAKEO TAKAHASHI
E21 - EARTH DRILLING MINING
Information
Patent Application
A PLUG FOR WELL DRILLING PROCESS PROVIDED WITH MANDREL FORMED FROM...
Publication number
20160108695
Publication date
Apr 21, 2016
Kureha Corporation
MASAYUKI OKURA
E21 - EARTH DRILLING MINING
Information
Patent Application
DEGRADABLE FIBER FOR USE IN WELL TREATMENT FLUID, METHOD FOR MANUFA...
Publication number
20160102244
Publication date
Apr 14, 2016
TAKEO TAKAHASHI
D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information
Patent Application
POLY-L-LACTIC ACID SOLID-STATE EXTRUSION MOLDED ARTICLE, METHOD FOR...
Publication number
20150354311
Publication date
Dec 10, 2015
Kureha Corporation
Masayuki Okura
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Application
WATER-DISINTEGRABLE COMPOSITE FIBER AND METHOD FOR PRODUCING THE SAME
Publication number
20150284879
Publication date
Oct 8, 2015
Kureha Corporation
Takeo Takahashi
D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information
Patent Application
SOLIDIFICATION- AND EXTRUSION-MOLDED ARTICLE OF POLYGLYCOLIC ACID A...
Publication number
20150252646
Publication date
Sep 10, 2015
Kureha Corporation
Masayuki Okura
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Application
POLYGLYCOLIC ACID RESIN SHORT FIBERS AND WELL TREATMENT FLUID
Publication number
20150126414
Publication date
May 7, 2015
KUREHA CORPORATION
Shunsuke Abe
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Application
SPIRAL GASKET
Publication number
20150123353
Publication date
May 7, 2015
Kabushiki Kaisha Toshiba
Daisuke Asakura
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Application
POLYGLYCOLIC ACID RESIN SHORT FIBERS FOR USE IN WELL TREATMENT FLUID
Publication number
20150087560
Publication date
Mar 26, 2015
Kureta Corporation
Shunduke Abe
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Application
CARBON DIOXIDE RECOVERY METHOD AND CARBON-DIOXIDE-RECOVERY-TYPE STE...
Publication number
20140208749
Publication date
Jul 31, 2014
Kabushiki Kaisha Toshiba
Yuya Murakami
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES