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Patents Grants
last 30 patents
Information
Patent Grant
Low temperature resistant oil casing having high strength and high...
Patent number
11,519,049
Issue date
Dec 6, 2022
Baoshan Iron & Steel Co., Ltd.
Wen Sun
C21 - METALLURGY OF IRON
Information
Patent Grant
High-strength and high-toughness perforating gun tube and manufactu...
Patent number
11,459,643
Issue date
Oct 4, 2022
Baoshan Iron & Steel Co., Ltd.
Xiaoming Dong
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Ultra-high strength and ultra-high toughness casing steel, oil casi...
Patent number
10,851,432
Issue date
Dec 1, 2020
Baoshan Iron & Steel Co., Ltd.
Xiaoming Dong
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
Anti-Collapse Oil Casing with High Strength and Manufacturing Metho...
Publication number
20230211396
Publication date
Jul 6, 2023
Baoshan Iron & Steel Co., Ltd
Xiaoming Dong
C21 - METALLURGY OF IRON
Information
Patent Application
LOW TEMPERATURE RESISTANT OIL CASING HAVING HIGH STRENGTH AND HIGH...
Publication number
20210025020
Publication date
Jan 28, 2021
Wen SUN
C21 - METALLURGY OF IRON
Information
Patent Application
HIGH-STRENGTH AND HIGH-TOUGHNESS PERFORATING GUN TUBE AND MANUFACTU...
Publication number
20190316234
Publication date
Oct 17, 2019
Baoshan Iron & Steel Co., Ltd
Xiaoming DONG
B22 - CASTING POWDER METALLURGY
Information
Patent Application
ULTRA-HIGH STRENGTH AND ULTRA-HIGH TOUGHNESS CASING STEEL, OIL CASI...
Publication number
20180291475
Publication date
Oct 11, 2018
Baoshan Iron & Steel Co., Ltd
Xiaoming DONG
C21 - METALLURGY OF IRON
Information
Patent Application
ULTRA-HIGH-STRENGTH AND ULTRA-HIGH-TOUGHNESS OIL CASING AND MANUFAC...
Publication number
20170159157
Publication date
Jun 8, 2017
Baoshan Iron & Steel Co., Ltd
Xiaoming DONG
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...