US3606778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for warm-rolling metal strip
Assignee: RMI Co
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Filing: 1968-06-17
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Granted: 1971-09-21
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Expires: 1988-06-17
Abstract
Abstract A METHOD AND APPARATUS FOR WARM-ROLLING METAL STRIP AT AN INTERMEDIATE TEMPERATURE OF ABOUT 300 TO 1400 F. THE STRIP IS CONTACTED ELECTRICALLY AT OPPOSITE SIDES OF A ROLL STAND, AND THUS HEATED BY ELECTRIC RESISTANCE. TEMPERATURE IS SENSED NEAR THE ENTRY SIDE OF ROLL STAND AND USED TO CONTROL CURRENT INPUT TO STRIP TO MAINTAIN THE PROPER TEMPERATURE.
Inventors
- 👤 Howard B Bomberger Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:34
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/0004; H05B3/0009; B; B21; B21B; B21B1/00; B21B1/22; B21B1/30; B21B1/32; B21B1/34; B21B45/00; B21B45/004; C; C21; C21D; C21D8/00; C21D8/02; C21D8/0221; C21D8/0231; B21B3/00; B21B45/008; Y; Y02; Y02P; Y02P70/00; Y02P70/10
Claims Analysis
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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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |