US2994471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air supply unit
Assignee: Bristol Siddeley Engines Ltd
•
Filing: 1958-03-10
•
Granted: 1961-08-01
•
Expires: 1978-03-10
Abstract
No abstract record available.
Inventors
- 👤 Lewis Gordon Manns
- 👤 Orchard Peter Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:05
CPC Classifications
F; F02; F02C; F02C6/00; F02C6/04; F02C6/06; B; B64; B64C; B64C23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2582848A
Cited
US2650666A
Cited
US2696079A
Cited
GB757981A
Cited
US2842306A
Cited
GB783880A
Cited
US2823851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |