US3130091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-oriented silicon-iron sheet stock and process of making it
Assignee: Armco Inc
•
Filing: 1958-04-28
•
Granted: 1964-04-21
•
Expires: 1978-04-28
Abstract
No abstract record available.
Inventors
- 👤 Victor W Carpenter
- 👤 John M Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:33
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/12; C21D8/1244; C21D8/1272; C21D3/00; C21D3/02; C21D3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A PROCESS FOR THE MANUFACTURE OF NON-ORIENTED SILICON-IRON STOCK OF SHEET GAUGE, WHICH COMPRISES HOT ROLLING TO AN INTERMEDIATE GAUGE A SILICON-IRON CONTAINING NOT MORE THAN ABOUT 3.8% SILICON AND SUBSTANTIALLY 0.02% TO 0.08% CARBON, PICKLING THE HOT ROLLED MATERIAL, COLD ROLLING IT TO FINAL GAUGE WITHOUT INTERMEDIATE ANNEALING, AND THEN SUBJECTING THE MATERIAL TO A STRAND ANNEALING TREATMENT AT A TEMPERATURE OF SUBSTANTIALLY 1950* TO 2200*F. IN A DECARBURIZING ATMOSPHERE WHEREBY TO REMOVE PART OF THE CARBON THEREIN WHILE LEAVING A TOTAL CARBON CONTENT IN EXCESS OF 0.01%, PICKLING THE STOCK, AND THEREAFTER SUBJECTING IT TO AN ANNEALING TREATMENT AT A TEMPERATURE OF SUBSTANTIALLY 1400* TO 1700*F. IN A DECARBURIZING ATMOSPHERE TO REDUCE THE TOTAL CARBON CONTENT TO A VALUE LESS THAN ABOUT 0.01%.
Claim 2
Dependent Claim
125 words
A PROCESS FOR THE MANUFACTURE OF NON-ORIENTED SILICON-IRON STOCK OF SHEET GAUGE, WHICH COMPRISES HOT ROLLING TO AN INTERMEDIATE GAUGE A SILICON-IRON CONTAINING NOT MORE THAN ABOUT 3.8% SILICON AND SUBSTANTIALLY 0.02% TO 0.08% CARBON, PICKLING THE HOT ROLLED MATERIAL, COLD ROLLING IT TO FINAL GAUGE WITHOUT INTERMEDIATE ANNEALING, AND THEN SUBJECTING THE MATERIAL TO A STRAND ANNEALING TREATMENT AT A TEMPERATURE OF SUBSTANTIALLY 1950* TO 2200*F. IN A DECARBURIZING ATMOSPHERE WHEREBY TO REMOVE PART OF THE CARBON THEREIN WHILE LEAVING A TOTAL CARBON CONTENT IN EXCESS OF 0.01%, PICKLING THE STOCK, AND THEREAFTER SUBJECTING IT TO AN ANNEALING TREATMENT AT A TEMPERATURE OF SUBSTANTIALLY 1400* TO 1700*F. IN A DECARBURIZING ATMOSPHERE TO REDUCE THE TOTAL CARBON CONTENT TO A VALUE LESS THAN ABOUT 0.01%.
References Cited (Backward Citations)
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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 |