Patent US3418818A successfully refreshed from Google Patents.
US3418818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater power source
Assignee: Pan American Petroleum Corp
•
Filing: 1966-04-22
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Granted: 1968-12-31
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Expires: 1986-04-22
Abstract
No abstract record available.
Inventors
- 👤 Renic P Vincent
- 👤 Lawrence B Wilder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:40
CPC Classifications
B; B63; B63G; B63G8/00; B63G8/08; B63G8/10; Y; Y10; Y10S; Y10S173/00; Y10S173/01; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2040956A
Cited
US3165899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |