US2852911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starting and ignition systems for gas turbine engines
Assignee: Rolls Royce PLC
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Filing: 1953-12-02
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Granted: 1958-09-23
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Expires: 1973-12-02
Abstract
No abstract record available.
Inventors
- 👤 West Harold Edward William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:39
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/02; C07F5/022; C10; C10M; C10M1/00; C10M1/08; F; F02; F02C; F02C7/00; F02C7/26; F02C7/264; F02C7/266; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10M2227/00; C10M2227/06; C10M2227/061; C10M2227/062; C10N; C10N2040/00; C10N2040/02; C10N2040/20; C10N2040/22; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2397659A
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US2443648A
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US2611239A
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US2643511A
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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) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |