US2668918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tide-operated power plant
Assignee: Individual
•
Filing: 1952-02-05
•
Granted: 1954-02-09
•
Expires: 1972-02-05
Abstract
No abstract record available.
Inventors
- 👤 Vernon W Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:44
CPC Classifications
F; F03; F03B; F03B13/00; F03B13/12; F03B13/26; F03B13/262
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1195386A
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US583821A
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US589367A
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US618729A
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US163451A
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FR743601A
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US659609A
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US901117A
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US975157A
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US1018678A
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US1029030A
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US1209975A
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US1393472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |