US2724887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of retarding disintegration of fire-brick and product thereof
Assignee: United States Steel Corp
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Filing: 1951-10-17
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Granted: 1955-11-29
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Expires: 1971-10-17
Abstract
No abstract record available.
Inventors
- 👤 James A Shea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:57
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/22; C04B33/02; C04B33/04; C04B33/06; C04B33/30; C04B41/00; C04B41/80; C04B41/81; C04B41/85; F; F27; F27D; F27D1/00; F27D1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US149266A
Cited
US182935A
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GB189901565A
Cited
US1285244A
Cited
US1585826A
Cited
US1585827A
Cited
US2307239A
Cited
US2320099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |