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Grain Oriented Electrical Steel Sheet And Method For Manufacturing Same
Abstract: A method for manufacturing a grain oriented electrical steel sheet according to an embodiment of the present invention comprises the steps of: hot-rolling a slab to prepare a hot-rolled sheet, the slab containing, in weight%, Si: 2.5-4.0%, C: 0.03-0.09%, Al: 0.015-0.040%, Mn: 0.04-0.15%, S: 0.01% or less (0% excluded), N: 0.002-0.012%, and the balance being Fe and other inevitably incorporated impurities; cold-rolling the hot-rolled sheet to prepare a cold-rolled sheet; performing primary recrystallization annealing on the cold-rolled sheet; and performing secondary recrystallization annealing on the cold-rolled sheet that has been primary recrystallization annealed.
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Notices, Deadlines & Correspondence
Notices, Deadlines & Correspondence
Patent Information
Application #
Filing Date
17 July 2023
Publication Number
41/2023
Publication Type
INA
Invention Field
METALLURGY
Status
Email
Parent Application
Patent Number
Legal Status
Grant Date
2025-04-30
Renewal Date
Applicants
POSCO CO., LTD
6261, Donghaean-ro, Nam-gu,
Pohang-si,
Gyeongsangbuk-do 37859
Inventors
1. KO, Kyungjun
c/o POSCO, (Goedong-dong) 6261, Donghaean-ro,
Nam-gu, Pohang-si,
Gyeongsangbuk-do 37859
2. LEE, Sangwoo
c/o POSCO, (Goedong-dong) 6261, Donghaean-ro,
Nam-gu, Pohang-si,
Gyeongsangbuk-do 37859
Specification
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 202337047951-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [17-07-2023(online)].pdf | 2023-07-17 |
| 2 | 202337047951-STATEMENT OF UNDERTAKING (FORM 3) [17-07-2023(online)].pdf | 2023-07-17 |
| 3 | 202337047951-REQUEST FOR EXAMINATION (FORM-18) [17-07-2023(online)].pdf | 2023-07-17 |
| 4 | 202337047951-PRIORITY DOCUMENTS [17-07-2023(online)].pdf | 2023-07-17 |
| 5 | 202337047951-POWER OF AUTHORITY [17-07-2023(online)].pdf | 2023-07-17 |
| 6 | 202337047951-NOTIFICATION OF INT. APPLN. NO. & FILING DATE (PCT-RO-105-PCT Pamphlet) [17-07-2023(online)].pdf | 2023-07-17 |
| 7 | 202337047951-FORM 18 [17-07-2023(online)].pdf | 2023-07-17 |
| 8 | 202337047951-FORM 1 [17-07-2023(online)].pdf | 2023-07-17 |
| 9 | 202337047951-DRAWINGS [17-07-2023(online)].pdf | 2023-07-17 |
| 10 | 202337047951-DECLARATION OF INVENTORSHIP (FORM 5) [17-07-2023(online)].pdf | 2023-07-17 |
| 11 | 202337047951-COMPLETE SPECIFICATION [17-07-2023(online)].pdf | 2023-07-17 |
| 12 | 202337047951-Proof of Right [10-08-2023(online)].pdf | 2023-08-10 |
| 13 | 202337047951-FORM 3 [29-12-2023(online)].pdf | 2023-12-29 |
| 14 | 202337047951-FER.pdf | 2024-08-30 |
| 15 | 202337047951-FORM 3 [03-10-2024(online)].pdf | 2024-10-03 |
| 16 | 202337047951-FER_SER_REPLY [25-02-2025(online)].pdf | 2025-02-25 |
| 17 | 202337047951-CLAIMS [25-02-2025(online)].pdf | 2025-02-25 |
| 18 | 202337047951-US(14)-HearingNotice-(HearingDate-14-04-2025).pdf | 2025-03-26 |
| 19 | 202337047951-Response to office action [27-03-2025(online)].pdf | 2025-03-27 |
| 20 | 202337047951-US(14)-ExtendedHearingNotice-(HearingDate-15-04-2025)-1100.pdf | 2025-03-28 |
| 21 | 202337047951-Correspondence to notify the Controller [11-04-2025(online)].pdf | 2025-04-11 |
| 22 | 202337047951-Written submissions and relevant documents [30-04-2025(online)].pdf | 2025-04-30 |
| 23 | 202337047951-PatentCertificate30-04-2025.pdf | 2025-04-30 |
| 24 | 202337047951-IntimationOfGrant30-04-2025.pdf | 2025-04-30 |
Search Strategy
| 1 | SearchStrategy45H202337047951E_19-07-2024.pdf |