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US3472432A
Expired / Lapsed
US
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Coated stopper head for controlling outflow of molten metal through the nozzle of a bottom pour receptacle
Assignee: Vesuvius Crucible Co
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Filing: 1968-03-28
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Granted: 1969-10-14
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Expires: 1988-03-28
Abstract
No abstract record available.
Inventors
- 👤 Ronald V Kilgore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:35
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/14; B22D41/16; B22D41/18
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) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |