US2986485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Annealing process for magnetic steel strip
Assignee: General Electric Co
•
Filing: 1958-07-28
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Granted: 1961-05-30
•
Expires: 1978-07-28
Abstract
No abstract record available.
Inventors
- 👤 Elmore J Fitz
- 👤 Robert E Waite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:49
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/12; C21D8/1244; C21D8/1261
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
THE METHOD OF TREATING COLD ROLLED ELECTRICAL SILICON STEEL STRIP CONTAINING 1 TO 4 PERCENT SILICON WHICH COMPRISES HEATING SAID SILICON STEEL STRIP FOR 10 TO 30 MINUTES AT A TEMPERATURE OF 950 TO 1050*C., IMMEDIATELY THEREAFTER HEATING SAID STRIP FOR 1 TO 30 MINUTES AT A TEMPERATURE OF 1200 TO 1250*C. WITHOUT COOLING THE SAME BETWEEN THE HEATING STEPS, AND THEREAFTER COOLING SAID STRIP AT A RATE OF NOT MORE THAN 100*C. PER MINUTE.
References Cited (Backward Citations)
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US2867559A
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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) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |