Patent US3431878A successfully refreshed from Google Patents.
US3431878A
Expired / Lapsed
US
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Fluidfoil ringcraft
Assignee: Individual
•
Filing: 1966-03-03
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Granted: 1969-03-11
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Expires: 1986-03-03
Abstract
No abstract record available.
Inventors
- 👤 Alvin Edward Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:44
CPC Classifications
B; B64; B64C; B64C3/00; B64C3/30; B63; B63B; B63B1/00; B63B1/16; B63B1/24; B64B; B64B1/00; B64C1/00; B64C1/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2933266A
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US3106373A
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US2875720A
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US3067712A
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US3179077A
Cited
US3184187A
Cited
US3237218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |