US3752683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection of turbine casings
Assignee: Foseco International Ltd
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Filing: 1970-10-01
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Granted: 1973-08-14
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Expires: 1990-10-01
Abstract
Abstract SHAPED REFRACTORY ARTICLES, ESPECIALLY TURBINE CASTING LINERS, ARE FORMED OF A REFRACTORY FIBRE/WATER SOLUBLE BINDER COMPOSITION, THE HARDNESS, STRENGTH AND DENSITY OF WHICH DO NOT VARY ACROSS THE BULK COMPOSITON.
Inventors
- 👤 P Hawthorne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:18
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/04; C; C04; C04B; C04B28/00; C04B28/24; C04B28/34; C04B35/00; C04B35/01; C04B35/14; C04B2111/00; C04B2111/00474; C04B2111/00612; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |