Patent US2664702A successfully refreshed from Google Patents.
US2664702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooled flame tube
Assignee: Power Jets Research and Development Ltd
•
Filing: 1948-07-29
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Granted: 1954-01-05
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Expires: 1968-07-29
Abstract
No abstract record available.
Inventors
- 👤 Lloyd Peter
- 👤 Shilling Walter Frederick
- 👤 Brown John
- 👤 Boulter Raymond Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:56
CPC Classifications
F; F01; F01D; F01D9/00; F01D9/02; F01D9/023; F23; F23R; F23R3/00; F23R3/02; F23R3/04; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |