US3585663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Longitudinally adjustable surfboard fin with self-contained locking mechanism
Assignee: WAVE Corp
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Filing: 1969-08-13
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Granted: 1971-06-22
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Expires: 1989-08-13
Abstract
Abstract SECURED WITHIN THE REARWARD UNDERSIDE SECTION OF A SURFBOARD IS A SURFBOARD FIN MOUNTING BOX WITH A CHANNEL AND A PAIR OF LONGITUDINALLY EXTENDING RUNNERS FORMED IN THEIR MARGINS WITH CUTAWAY ZONES THAT DEFINE A KEYWAY. A WEDGE-SHAPED BLOCK HAS TABS DEFINED A KEY SIZED TO FIT THROUGH THE KEYWAY. A FIN BASE HAS A SECTION THAT ALSO HAS TABS DEFINING A KEY SIZED TO FIT THROUGH THE KEYWAY. A PUSH ARM COUPLED TO THE WEDGE-SHAPED BLOCK CAN BE MANUALLY OPERATED TO FORCE THE WEDGE-SHAPED BLOCK INTO TIGHT INTERLOCKING RELATIONSHIP WITH THE FIN BASE IN ORDER TO SECURELY POSITION A FIN ATTACHED TO THE FIN BASE.
Inventors
- 👤 Robert Karl Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:24
CPC Classifications
B; B63; B63B; B63B32/00; B63B32/60; B63B32/66
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |