US3430644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary gate for bottom pour vessel
Assignee: United States Steel Corp
•
Filing: 1967-02-24
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Granted: 1969-03-04
•
Expires: 1987-02-24
Abstract
No abstract record available.
Inventors
- 👤 Richard E Lyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:29
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/14; B22D41/22; B22D41/26; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6161; Y10T137/6164; Y10T137/6181
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US659514A
Cited
US1105639A
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US1118594A
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US1214445A
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US2880757A
Cited
US3118472A
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US3165795A
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US3237916A
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US3344809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |