US3714971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature refractory lining
Assignee: Phillips Petroleum Co
•
Filing: 1971-01-25
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Granted: 1973-02-06
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Expires: 1991-01-25
Abstract
Abstract A REFRACTORY LINING COMPOSITION COMPRISING AN INNER CHROME ALUMINA PREFIRED SHAPE AND AN OUTER LAYER COMPRISING LIGHTWEIGHT ALUMINA CASTABLE. D R A W I N G
Inventors
- 👤 C Venable
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:50
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/14; F16L59/147; F16L9/00; F16L9/02; Y; Y10; Y10T; Y10T428/00; Y10T428/29
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |