Patent US3386633A successfully refreshed from Google Patents.
US3386633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure for a bottom pour metallurgical ladle
Assignee: Individual
•
Filing: 1966-04-20
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Granted: 1968-06-04
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Expires: 1986-04-20
Abstract
No abstract record available.
Inventors
- 👤 Nadrich John
- 👤 John A Ericson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:38
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1338001A
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US1447021A
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US1492883A
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US1584548A
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US1732126A
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US2286793A
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US2711846A
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US2961722A
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US3204836A
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US3200457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |