Patent US3130095A successfully refreshed from Google Patents.
US3130095A
Expired / Lapsed
US
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Production of oriented silicon-iron sheets by secondary recrystallization
Assignee: Armco Inc
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Filing: 1959-05-14
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Granted: 1964-04-21
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Expires: 1979-05-14
Abstract
No abstract record available.
Inventors
- 👤 Dale M Kohler
- 👤 John M Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:24
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/12; C21D8/1244; C21D8/1272; C22; C22C; C22C38/00; C22C38/02; C21D1/00; C21D1/74; C21D1/76; C21D8/1277; C21D8/1283
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN A PROCESS OF MAKING SILICON-IRON SHEETS HAVING A HIGH PROPORTION OF CUBE-ON-FACE GRAINS, THE STEPS COMPRISING ANNEALING COLD ROLLED SHEETS OF SILICON-IRON AT A TEMPERATURE OF AT LEAST ABOUT 1900*F. IN AN ATMOSPHERE OF DRY HYDROGEN, SAID ATMOSPHERE CONTAINING A VAPOR OF A SULFUR CONTAINING COMPOUND WHICH WILL DISSOCIATE AT THE ANNEALING TEMPERATURE TO PRODUCE ELEMENTAL SULFUR, THE PARTIAL PRESSURE OF SAID VAPOR BEING IN THE RANGE OF FROM 15 TO 190 MICRONS OF MERCURY, AND CONTINUING THE ANNEALING UNTIL SUBSTANTIALLY COMPLETE CUBE-ON-FACE GRAIN GROWTH BY SECONDARY RECRYSTALLIZATION TAKES PLACE.
Claim 2
Dependent Claim
91 words
IN A PROCESS OF MAKING SILICON-IRON SHEETS HAVING A HIGH PROPORTION OF CUBE-ON-FACE GRAINS, THE STEPS COMPRISING ANNEALING COLD ROLLED SHEETS OF SILICON-IRON AT A TEMPERATURE OF AT LEAST ABOUT 1900*F. IN AN ATMOSPHERE OF DRY HYDROGEN, SAID ATMOSPHERE CONTAINING A VAPOR OF A SULFUR CONTAINING COMPOUND WHICH WILL DISSOCIATE AT THE ANNEALING TEMPERATURE TO PRODUCE ELEMENTAL SULFUR, THE PARTIAL PRESSURE OF SAID VAPOR BEING IN THE RANGE OF FROM 15 TO 190 MICRONS OF MERCURY, AND CONTINUING THE ANNEALING UNTIL SUBSTANTIALLY COMPLETE CUBE-ON-FACE GRAIN GROWTH BY SECONDARY RECRYSTALLIZATION TAKES PLACE.
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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |