Patent US3395910A successfully refreshed from Google Patents.
US3395910A
Expired / Lapsed
US
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Metallurgical tuyere
Assignee: Union Carbide Corp
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Filing: 1965-12-01
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Granted: 1968-08-06
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Expires: 1985-12-01
Abstract
No abstract record available.
Inventors
- 👤 Ronald L W Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:23
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/05; B; B22; B22D; B22D1/00; B22D1/002; B22D1/005; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606; C21C7/00; C21C7/0037
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-06 | 1972-02-05 | 1972-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-06 | 1976-02-05 | 1976-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-06 | 1980-02-05 | 1980-08-06 | $7700.00 | Window Closed / Lapsed |