US2958456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-stage aerofoil-bladed compressors
Assignee: Power Jets Research and Development Ltd
•
Filing: 1955-10-04
•
Granted: 1960-11-01
•
Expires: 1975-10-04
Abstract
No abstract record available.
Inventors
- 👤 Forshaw James Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:27
CPC Classifications
F; F04; F04D; F04D27/00; F04D27/02; F04D27/0207; F04D27/0215
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1111498A
Cited
GB386814A
Cited
DE889506C
Cited
CH237682A
Cited
US2344835A
Cited
US2830754A
Cited
US2685405A
Cited
US2685429A
Cited
FR1068638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |