Patent US2913361A successfully refreshed from Google Patents.
US2913361A
Expired / Lapsed
US
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Silicon steel with improved magnetic anisotropy and method of making the same
Assignee: General Electric Co
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Filing: 1956-12-31
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Granted: 1959-11-17
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Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 Elmore J Fitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:42
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/14766; H01F1/14775; H01F1/14783; C; C21; C21D; C21D8/00; C21D8/12; C22; C22C; C22C38/00; C22C38/02; H01F1/16; C21D8/1216; C21D8/1233
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
55 words
THE METHOD OF MAKING SILICON STEEL SHEET MATERIAL COMPRISING FORMING A MELT CONTAINING IRON, ABOUT 1-4% SLILCON AND SULFUR WHEREIN ABOUT 0.005 TO 0.1% BY WEIGHT OF SULFUR HAS BEEN ADDED TO THE MELT, PRODUCING A METAL SHEET FROM SAID MELT, AND ANNEALING SAID METAL SHEET TO REFINE THE SAME AND TO DEVELOP GRAIN-ORIENTATION THEREIN.
Claim 2
Independent Claim
55 words
THE METHOD OF MAKING SILICON STEEL SHEET MATERIAL COMPRISING FORMING A MELT CONTAINING IRON, ABOUT 1-4% SLILCON AND SULFUR WHEREIN ABOUT 0.005 TO 0.1% BY WEIGHT OF SULFUR HAS BEEN ADDED TO THE MELT, PRODUCING A METAL SHEET FROM SAID MELT, AND ANNEALING SAID METAL SHEET TO REFINE THE SAME AND TO DEVELOP GRAIN-ORIENTATION THEREIN.
Claim 3
Dependent Claim
85 words
THE METOD OF FORMING THIN GAUGE SILICON STEEL SHEET MATERIAL COMPRISING FORMING A MELT CONTAINING IRON, ABOUT 1-4% SILICON AND SULFUR WHEREIN ABOUT 0.005 TO 0.1% BY WEIGHT OF SULFUR HAS BEEN ADDED TO THE MELT, PRODUCING A METAL SHEET OF ABOUT 14 TO 100 MILS THICKNESS FORM SAID MELT, ROLLING THE THUS PRODUCED METAL SHEET TO A THIN SHEET HAVING A THICKNESS OF LESS THAN 7 MILS, AND ANNEALING THE THUS PRODUCED THIN METAL SHEET TO REFINE THE SAME AND TO DEVELOP GRAIN-ORIENTATION THEREIN.
Claim 4
Dependent Claim
85 words
THE METOD OF FORMING THIN GAUGE SILICON STEEL SHEET MATERIAL COMPRISING FORMING A MELT CONTAINING IRON, ABOUT 1-4% SILICON AND SULFUR WHEREIN ABOUT 0.005 TO 0.1% BY WEIGHT OF SULFUR HAS BEEN ADDED TO THE MELT, PRODUCING A METAL SHEET OF ABOUT 14 TO 100 MILS THICKNESS FORM SAID MELT, ROLLING THE THUS PRODUCED METAL SHEET TO A THIN SHEET HAVING A THICKNESS OF LESS THAN 7 MILS, AND ANNEALING THE THUS PRODUCED THIN METAL SHEET TO REFINE THE SAME AND TO DEVELOP GRAIN-ORIENTATION THEREIN.
References Cited (Backward Citations)
US2473156A
Cited
US2765246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |