US2841958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion system of the kind comprising an outer air casing containing a flame compartment for use in gas turbine engines and ram jet engines
Assignee: Armstrong Siddeley Motors Ltd
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Filing: 1956-12-13
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Granted: 1958-07-08
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Expires: 1976-12-13
Abstract
No abstract record available.
Inventors
- 👤 Morris A Stokes
- 👤 Robert W O Papworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:19
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/42; F23R3/60; F23R3/02; F23R3/04; F23R3/28; F23R3/30; F23R3/32; Y; Y02; Y02T; Y02T50/00; Y02T50/60
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) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |