US3090711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Procedure for secondary recrystallization
Assignee: Armco Inc
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Filing: 1959-07-06
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Granted: 1963-05-21
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Expires: 1979-07-06
Abstract
No abstract record available.
Inventors
- 👤 Dale M Kohler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:58
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/12; C21D8/1216; C21D8/1233; C21D8/1244; C21D8/1272; C21D8/1277
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN A PROCESS OF PRODUCING SILICON-IRON SHEET STOCK CHARACTERIZED PREDOMINANTLY BY AN ORIENTATION OF THE CRYSTALS IN WHICH THE CUBE FACES THEREOF ARE SUBSTANTIALLY PARALLEL TO THE SURFACES OF THE SHEET STOCK, AND INCLUDING THE STEPS OF PRODUCING A SILICON-IRON SHEET STOCK WHICH, AFTER A PRIMARY RECRYSTALLIZATION WILL BE CHARACTERIZED BY A SUBSTANTIAL NUMBER OF GRAINS HAVING THEIR CUBIC FACES SO ORIENTED, THE PRODUCTION OF SAID STOCK INVOLVING A FINAL COLD ROLLING TREATMENT IMMEDIATELY PRECEDING SAID PRIMARY RECRYSTALLIZATION, THE IMPROVEMENT WHICH CONSISTS IN THAT THE SAID COLD ROLLING TREATMENT IS CHARACTERIZED IN THE FINAL PART AT LEAST BY THE REDUCTION OF THE SILICON-IRON SHEET STOCK BETWEEN ROLLS HAVING A PROFILOMETER READING NOT GREATER THAN ABOUT 5 MICROINCHES BEFORE SUBJECTING THE STOCK SO PRODUCED TO A SECONDARY RECRYSTALLIZATION TREATMENT AT HIGH TEMPERATURES.
Claim 2
Dependent Claim
131 words
IN A PROCESS OF PRODUCING SILICON-IRON SHEET STOCK CHARACTERIZED PREDOMINANTLY BY AN ORIENTATION OF THE CRYSTALS IN WHICH THE CUBE FACES THEREOF ARE SUBSTANTIALLY PARALLEL TO THE SURFACES OF THE SHEET STOCK, AND INCLUDING THE STEPS OF PRODUCING A SILICON-IRON SHEET STOCK WHICH, AFTER A PRIMARY RECRYSTALLIZATION WILL BE CHARACTERIZED BY A SUBSTANTIAL NUMBER OF GRAINS HAVING THEIR CUBIC FACES SO ORIENTED, THE PRODUCTION OF SAID STOCK INVOLVING A FINAL COLD ROLLING TREATMENT IMMEDIATELY PRECEDING SAID PRIMARY RECRYSTALLIZATION, THE IMPROVEMENT WHICH CONSISTS IN THAT THE SAID COLD ROLLING TREATMENT IS CHARACTERIZED IN THE FINAL PART AT LEAST BY THE REDUCTION OF THE SILICON-IRON SHEET STOCK BETWEEN ROLLS HAVING A PROFILOMETER READING NOT GREATER THAN ABOUT 5 MICROINCHES BEFORE SUBJECTING THE STOCK SO PRODUCED TO A SECONDARY RECRYSTALLIZATION TREATMENT AT HIGH TEMPERATURES.
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) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |