Patent US2863474A successfully refreshed from Google Patents.
US2863474A
Expired / Lapsed
US
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Ducting for high temperature fluids
Assignee: Power Jets Research and Development Ltd
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Filing: 1954-06-21
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Granted: 1958-12-09
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Expires: 1974-06-21
Abstract
No abstract record available.
Inventors
- 👤 Whitehead Leslie Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:29
CPC Classifications
B; B65; B65F; B65F3/00; B65F3/14; B65F3/22; B65F3/225; F; F01; F01D; F01D17/00; F01D17/02; F02; F02K; F02K1/00; F02K1/04; F02K1/78; F02K1/80; F16; F16L; F16L3/00; F16L3/16; F16L3/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |