US3540515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casting method with molten metal degassing during teeming
Assignee: United States Steel Corp
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Filing: 1968-08-05
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Granted: 1970-11-17
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Expires: 1988-08-05
Abstract
No abstract record available.
Inventors
- 👤 Richard E Lyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:20
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/10; B22D11/11; B22D11/113; C; C21; C21C; C21C7/00; C21C7/10
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) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |