US2867559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing grain oriented silicon steel
Assignee: General Electric Co
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Filing: 1956-12-31
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Granted: 1959-01-06
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Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 John E May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:03
CPC Classifications
B; B21; B21B; B21B3/00; B21B3/02; C; C21; C21D; C21D8/00; C21D8/12; C21D8/1216; C21D8/1233; C21D3/00; C21D3/02; C21D3/04; C21D8/1244; C21D8/1266
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
THE METHOD OF FABRICATING POLYCRYSTALLINE SHEET-LIKE BODIES OF METAL CONSISTING OF ELECTRICAL GRADE SILICON-IRON ALLOY HAVING FROM ABOUT 2.5% TO 4.0% SILICON, COMPRISING THE STEPS OF COLD REDUCING AN AT LEAST PARTIALLY RECRYSTALLIZED BODY OF SUCH MATERIAL AT LEAST 40 PERCENT BY UNIDIRECTIONAL ROLLING TO FORM A BODY INTERMEDIATE THICKNESS, HEAT TREATING SAID COLD REDUCED BODY OF INTERMEDIATE THICKNESS AT A TEMPERATURE OF FROM 700*C. TO 1000*C. TO PRODUCE A MEASURED AVERAGE GRAIN SIZE OF FROM ABOUT 0.010 MM. TO ABOUT 0.030 MM., COLD REDUCING SAID ANNEALED BODY AT LEAST 40 PERCENT BY UNIDIRECTIONAL ROLLING TO PRODUCE A SHEET-LIKE BODY OF FINAL THICKNESS AND RAISING THE TEMPERATURE OF SAID COLD WORKED SHEET-LIKE BODY TO FROM ABOUT 950*C. TO ABOUT 1200*C. FOR A TIME SUFFICIENT TO DEVELOP THE DESIRED HIGH DEGREE OF (110) (001) TEXTURE.
Claim 2
Independent Claim
134 words
THE METHOD OF FABRICATING POLYCRYSTALLINE SHEET-LIKE BODIES OF METAL CONSISTING OF ELECTRICAL GRADE SILICON-IRON ALLOY HAVING FROM ABOUT 2.5% TO 4.0% SILICON, COMPRISING THE STEPS OF COLD REDUCING AN AT LEAST PARTIALLY RECRYSTALLIZED BODY OF SUCH MATERIAL AT LEAST 40 PERCENT BY UNIDIRECTIONAL ROLLING TO FORM A BODY INTERMEDIATE THICKNESS, HEAT TREATING SAID COLD REDUCED BODY OF INTERMEDIATE THICKNESS AT A TEMPERATURE OF FROM 700*C. TO 1000*C. TO PRODUCE A MEASURED AVERAGE GRAIN SIZE OF FROM ABOUT 0.010 MM. TO ABOUT 0.030 MM., COLD REDUCING SAID ANNEALED BODY AT LEAST 40 PERCENT BY UNIDIRECTIONAL ROLLING TO PRODUCE A SHEET-LIKE BODY OF FINAL THICKNESS AND RAISING THE TEMPERATURE OF SAID COLD WORKED SHEET-LIKE BODY TO FROM ABOUT 950*C. TO ABOUT 1200*C. FOR A TIME SUFFICIENT TO DEVELOP THE DESIRED HIGH DEGREE OF (110) (001) TEXTURE.
References Cited (Backward Citations)
US2158065A
Cited
US2599340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |