US2438559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace lining
Assignee: AMERICAN CRUCIBLE Co
•
Filing: 1942-02-18
•
Granted: 1948-03-30
•
Expires: 1962-02-18
Abstract
No abstract record available.
Inventors
- 👤 George T Hubbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:56
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US523955A
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GB135241A
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US790214A
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US1197672A
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US1341299A
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US1285244A
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US1408877A
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US1663660A
Cited
US1623833A
Cited
US1829320A
Cited
GB332701A
Cited
US1996660A
Cited
US2253707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-30 | 1951-09-29 | 1952-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-30 | 1955-09-29 | 1956-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-30 | 1959-09-29 | 1960-03-30 | $7700.00 | Window Closed / Lapsed |