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"High Strength Steel And Method Of Producing Molten Steel For High Strength Steel Sheet"
Abstract: A high-strength steel sheet includes: 0.03 to 0.20% of C, 0.08 to 1.5% of Si, 0.5 to 3.0% of Mn, 0.05% or less of P, 0.0005% or more of S, 0.008 to 0.20% of acid-soluble Ti, 0.0005 to 0.01% of N, more than 0.01% of acid-soluble Al, and 0.001 to 0.04% of one or both of Ce and La in terms of mass%; and the balance including Fe and inevitable impurities. The ratio of (Ce+La)/acid-soluble Al is equal to or more than 0.1 and the ratio of (Ce+La)/S is in the range of 0.4 to 50 in a mass base, and the density of the number of inclusions, having a circle equivalent diameter of 2 µm. or less, which are present in the steel sheet is equal to or more than 15/mm
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Notices, Deadlines & Correspondence
Notices, Deadlines & Correspondence
Patent Information
Application #
Filing Date
01 December 2010
Publication Number
09/2012
Publication Type
INA
Invention Field
METALLURGY
Status
Email
Parent Application
Patent Number
Legal Status
Grant Date
2019-08-02
Renewal Date
Applicants
NIPPON STEEL CORPORATION
6-1, MARUNOUCHI 2-CHOME, CHIYODA-KU, TOKYO 100-8071, JAPAN
Inventors
1. KENICHI YAMAMOTO
C/O NIPPON STEEL CORPORATION, 6-1, MARUNOUCHI 2-CHOME, CHIYODA-KU, TOKYO 100-8071, JAPAN
2. KATSUHIRO SASAI
C/O NIPPON STEEL CORPORATION, 6-1, MARUNOUCHI 2-CHOME, CHIYODA-KU, TOKYO 100-8071, JAPAN
3. HIDEAKI YAMAMURA
C/O NIPPON STEEL CORPORATION, 6-1, MARUNOUCHI 2-CHOME, CHIYODA-KU, TOKYO 100-8071, JAPAN
4. HIROSHI HARADA
C/O NIPPON STEEL CORPORATION, 6-1, MARUNOUCHI 2-CHOME, CHIYODA-KU, TOKYO 100-8071, JAPAN
5. KAORU KAWASAKI
C/O NIPPON STEEL CORPORATION, 6-1, MARUNOUCHI 2-CHOME, CHIYODA-KU, TOKYO 100-8071, JAPAN
Specification
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 8521-DELNP-2010-Correspondence Others-(01-04-2011).pdf | 2011-04-01 |
| 1 | 8521-DELNP-2010-RELEVANT DOCUMENTS [30-08-2023(online)].pdf | 2023-08-30 |
| 2 | 8521-DELNP-2010-Form-3-(30-05-2011).pdf | 2011-05-30 |
| 2 | 8521-DELNP-2010-RELEVANT DOCUMENTS [24-09-2022(online)].pdf | 2022-09-24 |
| 3 | 8521-DELNP-2010-RELEVANT DOCUMENTS [26-07-2021(online)].pdf | 2021-07-26 |
| 3 | 8521-DELNP-2010-Correspondence Others-(30-05-2011).pdf | 2011-05-30 |
| 4 | 8521-DELNP-2010-RELEVANT DOCUMENTS [20-02-2020(online)].pdf | 2020-02-20 |
| 4 | 8521-delnp-2010-gpa.pdf | 2011-08-20 |
| 5 | 8521-DELNP-2010-IntimationOfGrant02-08-2019.pdf | 2019-08-02 |
| 5 | 8521-delnp-2010-form-5.pdf | 2011-08-20 |
| 6 | 8521-DELNP-2010-PatentCertificate02-08-2019.pdf | 2019-08-02 |
| 6 | 8521-delnp-2010-form-3.pdf | 2011-08-20 |
| 7 | 8521-delnp-2010-form-2.pdf | 2011-08-20 |
| 7 | 8521-DELNP-2010-Correspondence-130619.pdf | 2019-06-25 |
| 8 | 8521-DELNP-2010-OTHERS-130619.pdf | 2019-06-25 |
| 8 | 8521-delnp-2010-form-18.pdf | 2011-08-20 |
| 9 | 8521-delnp-2010-form-1.pdf | 2011-08-20 |
| 9 | 8521-DELNP-2010-Power of Attorney-130619.pdf | 2019-06-25 |
| 10 | 8521-delnp-2010-drawings.pdf | 2011-08-20 |
| 10 | 8521-DELNP-2010-FORM 13 [12-06-2019(online)].pdf | 2019-06-12 |
| 11 | 8521-delnp-2010-description (complete).pdf | 2011-08-20 |
| 11 | 8521-DELNP-2010-RELEVANT DOCUMENTS [12-06-2019(online)].pdf | 2019-06-12 |
| 12 | 8521-delnp-2010-correspondence-others.pdf | 2011-08-20 |
| 12 | 8521-DELNP-2010-FORM 3 [18-09-2017(online)].pdf | 2017-09-18 |
| 13 | 8521-delnp-2010-claims.pdf | 2011-08-20 |
| 13 | 8521-DELNP-2010-Correspondence-210717.pdf | 2017-08-01 |
| 14 | 8521-delnp-2010-abstract.pdf | 2011-08-20 |
| 14 | 8521-DELNP-2010-OTHERS-210717.pdf | 2017-08-01 |
| 15 | 8521-delnp-2010-GPA-(09-07-2013).pdf | 2013-07-09 |
| 15 | 8521-DELNP-2010-Power of Attorney-210717.pdf | 2017-08-01 |
| 16 | 8521-DELNP-2010-ABSTRACT [20-07-2017(online)].pdf | 2017-07-20 |
| 16 | 8521-delnp-2010-Form-2-(09-07-2013).pdf | 2013-07-09 |
| 17 | 8521-delnp-2010-Form-1-(09-07-2013).pdf | 2013-07-09 |
| 17 | 8521-DELNP-2010-CLAIMS [20-07-2017(online)].pdf | 2017-07-20 |
| 18 | 8521-DELNP-2010-COMPLETE SPECIFICATION [20-07-2017(online)].pdf | 2017-07-20 |
| 18 | 8521-delnp-2010-Correspondence Others-(09-07-2013).pdf | 2013-07-09 |
| 19 | 8521-DELNP-2010-CORRESPONDENCE [20-07-2017(online)].pdf | 2017-07-20 |
| 19 | 8521-DELNP-2010-FER.pdf | 2017-04-18 |
| 20 | 8521-DELNP-2010-FER_SER_REPLY [20-07-2017(online)].pdf | 2017-07-20 |
| 20 | 8521-DELNP-2010-PETITION UNDER RULE 137 [19-07-2017(online)].pdf | 2017-07-19 |
| 21 | 8521-DELNP-2010-FORM 3 [19-07-2017(online)].pdf | 2017-07-19 |
| 22 | 8521-DELNP-2010-FER_SER_REPLY [20-07-2017(online)].pdf | 2017-07-20 |
| 22 | 8521-DELNP-2010-PETITION UNDER RULE 137 [19-07-2017(online)].pdf | 2017-07-19 |
| 23 | 8521-DELNP-2010-CORRESPONDENCE [20-07-2017(online)].pdf | 2017-07-20 |
| 23 | 8521-DELNP-2010-FER.pdf | 2017-04-18 |
| 24 | 8521-delnp-2010-Correspondence Others-(09-07-2013).pdf | 2013-07-09 |
| 24 | 8521-DELNP-2010-COMPLETE SPECIFICATION [20-07-2017(online)].pdf | 2017-07-20 |
| 25 | 8521-delnp-2010-Form-1-(09-07-2013).pdf | 2013-07-09 |
| 25 | 8521-DELNP-2010-CLAIMS [20-07-2017(online)].pdf | 2017-07-20 |
| 26 | 8521-DELNP-2010-ABSTRACT [20-07-2017(online)].pdf | 2017-07-20 |
| 26 | 8521-delnp-2010-Form-2-(09-07-2013).pdf | 2013-07-09 |
| 27 | 8521-delnp-2010-GPA-(09-07-2013).pdf | 2013-07-09 |
| 27 | 8521-DELNP-2010-Power of Attorney-210717.pdf | 2017-08-01 |
| 28 | 8521-delnp-2010-abstract.pdf | 2011-08-20 |
| 28 | 8521-DELNP-2010-OTHERS-210717.pdf | 2017-08-01 |
| 29 | 8521-delnp-2010-claims.pdf | 2011-08-20 |
| 29 | 8521-DELNP-2010-Correspondence-210717.pdf | 2017-08-01 |
| 30 | 8521-delnp-2010-correspondence-others.pdf | 2011-08-20 |
| 30 | 8521-DELNP-2010-FORM 3 [18-09-2017(online)].pdf | 2017-09-18 |
| 31 | 8521-delnp-2010-description (complete).pdf | 2011-08-20 |
| 31 | 8521-DELNP-2010-RELEVANT DOCUMENTS [12-06-2019(online)].pdf | 2019-06-12 |
| 32 | 8521-delnp-2010-drawings.pdf | 2011-08-20 |
| 32 | 8521-DELNP-2010-FORM 13 [12-06-2019(online)].pdf | 2019-06-12 |
| 33 | 8521-delnp-2010-form-1.pdf | 2011-08-20 |
| 33 | 8521-DELNP-2010-Power of Attorney-130619.pdf | 2019-06-25 |
| 34 | 8521-delnp-2010-form-18.pdf | 2011-08-20 |
| 34 | 8521-DELNP-2010-OTHERS-130619.pdf | 2019-06-25 |
| 35 | 8521-DELNP-2010-Correspondence-130619.pdf | 2019-06-25 |
| 35 | 8521-delnp-2010-form-2.pdf | 2011-08-20 |
| 36 | 8521-DELNP-2010-PatentCertificate02-08-2019.pdf | 2019-08-02 |
| 36 | 8521-delnp-2010-form-3.pdf | 2011-08-20 |
| 37 | 8521-DELNP-2010-IntimationOfGrant02-08-2019.pdf | 2019-08-02 |
| 37 | 8521-delnp-2010-form-5.pdf | 2011-08-20 |
| 38 | 8521-DELNP-2010-RELEVANT DOCUMENTS [20-02-2020(online)].pdf | 2020-02-20 |
| 38 | 8521-delnp-2010-gpa.pdf | 2011-08-20 |
| 39 | 8521-DELNP-2010-RELEVANT DOCUMENTS [26-07-2021(online)].pdf | 2021-07-26 |
| 39 | 8521-DELNP-2010-Correspondence Others-(30-05-2011).pdf | 2011-05-30 |
| 40 | 8521-DELNP-2010-RELEVANT DOCUMENTS [24-09-2022(online)].pdf | 2022-09-24 |
| 40 | 8521-DELNP-2010-Form-3-(30-05-2011).pdf | 2011-05-30 |
| 41 | 8521-DELNP-2010-RELEVANT DOCUMENTS [30-08-2023(online)].pdf | 2023-08-30 |
| 41 | 8521-DELNP-2010-Correspondence Others-(01-04-2011).pdf | 2011-04-01 |
Search Strategy
| 1 | 8521DELNP2010SEARCHSTRATEGY_25-01-2017.pdf |