Patent US3716880A successfully refreshed from Google Patents.
US3716880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circular water skis or surfboard
Assignee: Individual
•
Filing: 1970-09-25
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Granted: 1973-02-20
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Expires: 1990-09-25
Abstract
Abstract A SAUCER-SHAPED WATER SKI INCLUDES A ROTATABLE TURNTABLE FOR RECEIVING AND SUPPORTING THE USER''S FEET.
Inventors
- 👤 H Sorenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:36
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/02; B63B1/04; B63B1/041; B63B32/00; B63B32/30; B63B32/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |