Patent US3462121A successfully refreshed from Google Patents.
US3462121A
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US
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Ladle stopper head assembly
Assignee: Vesuvius Crucible Co
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Filing: 1966-12-19
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Granted: 1969-08-19
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Expires: 1986-12-19
Abstract
No abstract record available.
Inventors
- 👤 Eugene R Smull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:53
CPC Classifications
F; F16; F16K; F16K51/00; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6116
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB457355A
Cited
US2171078A
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US2594659A
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US3040400A
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US3183564A
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US3195198A
Cited
US3126593A
Cited
US3262673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |