Patent US2826520A successfully refreshed from Google Patents.
US2826520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of processing grain-oriented silicon steel
Assignee: United States Steel Corp
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Filing: 1956-01-19
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Granted: 1958-03-11
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Expires: 1976-01-19
Abstract
No abstract record available.
Inventors
- 👤 Reginald L Rickett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:21
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/78; C22; C22C; C22C38/00; C22C38/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A METHOD OF PROCESSING GRAIN-ORIENTED SILICON STEEL CHARACTERIZED BY HEATING SLABS OF STEEL CONTAINING BETWEEN 3 AND 3.5% SILICON AT A TEMPERATURE BETWEEN 2225 AND 2275*F. FOR A MINIMUM OF 8 HOURS AND HOT ROLLING SAID SLABS TO THE DESIRED GAUGE, SAID HOT ROLLING BEIG COMPLETED AT TEMPERATURES IN EXCESS OF ABOUT 1750*F.
Claim 2
Independent Claim
53 words
A METHOD OF PROCESSING GRAIN-ORIENTED SILICON STEEL CHARACTERIZED BY HEATING SLABS OF STEEL CONTAINING BETWEEN 3 AND 3.5% SILICON AT A TEMPERATURE BETWEEN 2225 AND 2275*F. FOR A MINIMUM OF 8 HOURS AND HOT ROLLING SAID SLABS TO THE DESIRED GAUGE, SAID HOT ROLLING BEIG COMPLETED AT TEMPERATURES IN EXCESS OF ABOUT 1750*F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |