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US2465375A
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US
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Refractory and method of producing the same
Assignee: MC FEELY BRICK Co
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Filing: 1947-10-20
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Granted: 1949-03-29
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Expires: 1967-10-20
Abstract
No abstract record available.
Inventors
- 👤 Robert R Hendren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:37
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/01; C04B35/013; C04B35/16; C04B35/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US192398A
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US253748A
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US1891979A
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US1249960A
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US1374909A
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US1503150A
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US1802776A
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US1849289A
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US2057349A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-28 | 1952-09-27 | 1953-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-28 | 1956-09-27 | 1957-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-28 | 1960-09-27 | 1961-03-29 | $7700.00 | Window Closed / Lapsed |