US3238534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic pumps and reversible pump turbines
Assignee: English Electric Co Ltd
•
Filing: 1963-10-07
•
Granted: 1966-03-01
•
Expires: 1983-10-07
Abstract
No abstract record available.
Inventors
- 👤 Hartland Derek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:27
CPC Classifications
F; F03; F03B; F03B15/00; F03B15/005; F03B11/00; F03B11/002; F03B3/00; F03B3/10; F03B3/103; Y; Y02; Y02E; Y02E10/00; Y02E10/20; Y10; Y10S; Y10S415/00; Y10S415/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |