US2797549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion apparatus incorporating a combustion chamber of the cyclone or vortex type
Assignee: Power Jets Research and Development Ltd
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Filing: 1951-11-05
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Granted: 1957-07-02
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Expires: 1971-11-05
Abstract
No abstract record available.
Inventors
- 👤 Probert Rhys Price
- 👤 Johnstone Alexander Pearse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:47
CPC Classifications
F; F23; F23C; F23C3/00; F23C3/006; F23C3/008; F23R; F23R3/00; F23R3/42; F23R3/425; F23R3/58
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) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |