US3705967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction heating method
Assignee: United States Steel Corp
•
Filing: 1971-02-08
•
Granted: 1972-12-12
•
Expires: 1991-02-08
Abstract
Abstract DISCLOSED HEREIN IS AN INDUCTION HEATING METHOD FOR CONTINOUS RAPID HEATING OF AN ELONGATED METAL WORKIPIECE OF RECTANGULAR CROSS-SECTION. A CONTINOUS-CAST RECTANGULAR-SECTION STEEL STRAND, WHILE TRAVELLING FROM CASTER MOLD TO REDUCING ROLLS IN CONTINOUS CASTER LINE, IS SEQUENTIALLY PASSED LONGITUDINALLY THROUGH TWO TYPES OF INDUCTION HEATING MEANS OPERATING IN COMBINATION TO HEAT THE STRAND FLAT-CENTER REGIONS AND CORNER REGIONS UP TO ROLLING TEMPERATURE.
Inventors
- 👤 George F Bobart
- 👤 William A Emerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:08
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/34; C21D1/42; B; B21; B21B; B21B45/00; B21B45/004; B21B1/00; B21B1/46; B21B1/463; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |