US2869321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel reaction chambers
Assignee: British Thomson Houston Co Ltd
•
Filing: 1954-01-29
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Granted: 1959-01-20
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Expires: 1974-01-29
Abstract
No abstract record available.
Inventors
- 👤 Welch Douglas Francis
- 👤 Randall Kenneth Barrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:05
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/42; F02K9/60; F02K9/68
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |