US3422624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas turbine engine
Assignee: Rolls Royce PLC
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Filing: 1967-01-23
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Granted: 1969-01-21
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Expires: 1987-01-23
Abstract
No abstract record available.
Inventors
- 👤 Leslie John Brooks
- 👤 Geoffrey William Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:34
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/54; F02K1/56; F02K1/58; F02K1/40; F02K1/42; F02K1/64; F02K1/68
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) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |