US2764871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydro-electric power apparatus
Assignee: Individual
•
Filing: 1952-03-29
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Granted: 1956-10-02
•
Expires: 1972-03-29
Abstract
No abstract record available.
Inventors
- 👤 Dowling Patrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:14
CPC Classifications
E; E02; E02B; E02B9/00; F; F03; F03B; F03B17/00; F03B17/06; F03B17/062; F03B17/063; Y; Y02; Y02E; Y02E10/00; Y02E10/20; Y02E10/30
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) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |