US2722802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Axial flow turbojet engines having independently rotating low and high pressure systems
Assignee: Bristol Aeroplane Co Ltd
•
Filing: 1952-04-12
•
Granted: 1955-11-08
•
Expires: 1972-04-12
Abstract
No abstract record available.
Inventors
- 👤 Blackwell Basil Davenport
- 👤 Peaster Bertram Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:34
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/36; F02C3/00; F02C3/04; F02C3/06; F02C3/067; F02C3/073; F02C3/14; F02K; F02K3/00; F02K3/02; F02K3/04; F02K3/068
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE23198E
Cited
US2505660A
Cited
DE687108C
Cited
FR879123A
Cited
US2409177A
Cited
US2575682A
Cited
US2540902A
Cited
US2599470A
Cited
US2608821A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |