Patent US3304210A successfully refreshed from Google Patents.
US3304210A
Expired / Lapsed
US
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Process in the heating of metal billets and an arrangement for carrying out the process
Assignee: Svenska Metallverkens UGNS AB
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Filing: 1963-10-18
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Granted: 1967-02-14
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Expires: 1983-10-18
Abstract
No abstract record available.
Inventors
- 👤 Lofstrom Per Orvar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:21
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/02; F27B9/14; F27B9/20; F27B9/201; F27B9/202; F27B9/207
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A METHOD OF HEATING STEEL BILLETS TO A DESIRED HIGH TEMPERATURE IN AN OXYGEN-CONTAINING ATMOSPHERE COMPRISING PASSING THE BILLETS THROUGH A PREHEATING ZONE TO HEAT THE BILLETS UNIFORMLY TO A MODERATE TEMPERATURE BELOW WHICH NO SUBSTANTIAL SURFACE REACTION OCCURS, IMMEDIATELY TRANSFERRING THE BILLETS TO A FINAL HEATING ZONE, AND PASSING THE BILLETS THROUGH SAID FINAL HEATING ZONE RAPIDLY TO FURTHER HEAT THE BILLETS UNIFORMLY TO THE DESIRED HIGH TEMPERATURE IN THE SHORTEST POSSIBLE TIME SO THAT SURFACE REACTIONS ARE MINIMIZED.
Claim 2
Independent Claim
80 words
A METHOD OF HEATING STEEL BILLETS TO A DESIRED HIGH TEMPERATURE IN AN OXYGEN-CONTAINING ATMOSPHERE COMPRISING PASSING THE BILLETS THROUGH A PREHEATING ZONE TO HEAT THE BILLETS UNIFORMLY TO A MODERATE TEMPERATURE BELOW WHICH NO SUBSTANTIAL SURFACE REACTION OCCURS, IMMEDIATELY TRANSFERRING THE BILLETS TO A FINAL HEATING ZONE, AND PASSING THE BILLETS THROUGH SAID FINAL HEATING ZONE RAPIDLY TO FURTHER HEAT THE BILLETS UNIFORMLY TO THE DESIRED HIGH TEMPERATURE IN THE SHORTEST POSSIBLE TIME SO THAT SURFACE REACTIONS ARE MINIMIZED.
References Cited (Backward Citations)
US2126534A
Cited
US2723927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |