US3756805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing lead bead bearing steel
Assignee: Individual
•
Filing: 1970-10-09
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Granted: 1973-09-04
•
Expires: 1990-10-09
Abstract
Abstract METHOD FOR PRODUCING LEAD-BEARING STEEL AND THE PRODUCT PRODUCED THEREBY COMPRISING DISCHARGING A STREAM OF MOLTEN STEEL FROM A MELTING FURNACE TO A LADLE, AND ADDING LEAD TO THE STREAM OF MOLTEN STEEL AS IT IS BEING DISCHARGED FROM THE MELTING FURNACE AT TEMPERATUREA ABOVE 1600*C. AND CONTROLLING THE TEMPERATURE OF THE BATH, AND DISSOLVING OXYGEN IN THE BATH IN THE LADLE IN ORDER TO FAVOR THE FORMATION OF LEAD-OXIDE.
Inventors
- 👤 J Ormaechea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:03
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/0037; C21C7/0043; C22; C22C; C22C38/00; C22C38/60
Claims Analysis
Total Claims: 0
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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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |