US3876476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuously cast slabs for grain oriented electrical steel sheet and method for producing said steel sheet
Assignee: Nippon Steel Corp
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Filing: 1972-11-29
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Granted: 1975-04-08
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Expires: 1992-11-29
Abstract
Abstract A continuously cast slab for producing grain oriented electrical steel sheets, comprising 0.025 - 0.060% of carbon, not less than 0.030% of manganese, not less than 0.010% of sulfur, 2.0 - 4.0% of silicon, not more than 0.005% of sol.aluminum, with the balance being iron and unavoidable impurities, and the ratio of SiO.sub.2 /Al.sub.2 O.sub.3 being not more than 1.1.
Inventors
- 👤 Hideo Matsuoka
- 👤 Minoru Motoyoshi
- 👤 Masaru Makino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:26
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/02; C21; C21D; C21D8/00; C21D8/12; C21D8/1205
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
38 words
A CONTINUOUSLY CAST SLAB FOR PRODUCING GRAIN ORIENTED ELECTRICAL STEEL SHEETS CONSISTING ESSENTIALLY OF 0.025 TO 0.060 CARBON, NOT LESS THAN 0.030% MANGANESE, NOT LESS THAN 0.010% SULFUR, 2.0 TO 4.0% SILICON, NOT MORE THAN 0.12% OXYGEN, NOT
Claim 2
Dependent Claim
38 words
A CONTINUOUSLY CAST SLAB FOR PRODUCING GRAIN ORIENTED ELECTRICAL STEEL SHEETS CONSISTING ESSENTIALLY OF 0.025 TO 0.060 CARBON, NOT LESS THAN 0.030% MANGANESE, NOT LESS THAN 0.010% SULFUR, 2.0 TO 4.0% SILICON, NOT MORE THAN 0.12% OXYGEN, NOT
Claim 3
Dependent Claim
16 words
A continuously cast slab according to claim 1, in which the sol.aluminum is 0.002 - 0.005%.
References Cited (Backward Citations)
US3671337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |