US2818248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory block and ladle lining construction
Assignee: Individual
•
Filing: 1955-09-12
•
Granted: 1957-12-31
•
Expires: 1975-09-12
Abstract
No abstract record available.
Inventors
- 👤 Paul S Kelsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:17
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE35180C
Cited
US110882A
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US229766A
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US471173A
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US850048A
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US1032675A
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US1845472A
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US1988856A
Cited
US2526289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |