US2534653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making composite refractory
Assignee: Ferro Engineering Co
•
Filing: 1946-06-10
•
Granted: 1950-12-19
•
Expires: 1966-06-10
Abstract
No abstract record available.
Inventors
- 👤 Chester R Austin
- 👤 Henry Z Schofield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:19
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5025; C04B41/5042; C04B41/52; C04B41/80; C04B41/81; C04B41/85; C04B41/87; C04B41/89
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1400489A
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US1609427A
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US1630762A
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US1675119A
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US1612916A
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US1754838A
Cited
US2067716A
Cited
US2303304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |