Patent US4394794A successfully refreshed from Google Patents.
Patent US3794559A successfully refreshed from Google Patents.
US3794559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure vessels
Assignee: Taylor Woodrow Construction Ltd
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Filing: 1971-07-27
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Granted: 1974-02-26
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Expires: 1991-07-27
Abstract
Abstract A concrete pressure vessel having a lined cavity for hot, chemically aggressive liquid disposed within a cooling jacket with a layer of material of high thermal conductivity between the cavity liner and the cooling jacket, the jacket and high thermally conductive layer serving to maintain the temperature of the cavity liner within closely controlled limits and the maximum temperature of the main body of the vessel at an acceptable level, and the jacket and the conductive layer also serving to prevent leakage of liquid from the cavity.
Inventors
- 👤 I Davies
- 👤 R Burrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:25
CPC Classifications
G; G21; G21C; G21C13/00; G21C13/08; G21C13/093; G21C13/0933; G21C11/00; G21C11/08; G21C15/00; G21C15/02; G21C15/12; Y; Y02; Y02E; Y02E30/00; Y02E30/30
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |