Patent US669389A successfully refreshed from Google Patents.
Patent US3673039A successfully refreshed from Google Patents.
US3673039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing pouring spout
Assignee: Southwire Co LLC
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Filing: 1971-01-20
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Granted: 1972-06-27
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Expires: 1991-01-20
Abstract
Abstract A LONG LIFE POURING SPOUT FOR POURING MOLTEN METAL IN A CONTINUOUS CASTING SYSTEM, WHEREIN THE BODY OF THE SPOUT IS FABRICATED OF GRAPHITE AND AN INSULATING SHIELD SURROUNDS THE POURING SPOUT AND PREVENTS AIR FROM CONTACTING THE OUTSIDE SURFACE OF THE POURING SPOUT.
Inventors
- 👤 Chester F Todd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:45
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/06; B22D11/0637; B22D11/064; B22D11/0642; B22D41/00; B22D41/50
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |