Patent US3579681A successfully refreshed from Google Patents.
US3579681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sectional and longitudinally adjustable surfboard fin assembly
Assignee: Individual
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Filing: 1969-04-01
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Granted: 1971-05-25
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Expires: 1989-04-01
Abstract
Abstract A SURFBOARD FIN ASSEMBLY INCLUDES A LONGITUDINALLY ADJUSTABLE FIN SECTION MOVABLE MOUNTED WITHIN AN ELONGATED CHANNEL FORMED BY A FIN BASE SECTION. THE FIN BASE SECTION HAS TAPERED EXTERIOR SIDE WALLS SIZED FOR WEDGING ENGAGEMENT WITH TAPERED INTERIOR SIDE WALLS OF A MOUNTING BOX. THE FIN BASE SECTION CAN BE SELECTIVELY INTERLOCKED WITH THE FIN SECTION BY USE OF A RETAINING PLATE THAT IS SLIDABLY COUPLED TO THE FIN BASE SECTION AND IS LOCATED IN THE ELONGATED CHANNEL. THE RETAINING PLATE HAS A POSITIONING GROOVE FOR RECEIVING A PORTION OF THE FIN SECTION.
Inventors
- 👤 Karl D Pope
- 👤 Thomas H Morey
- 👤 Robert R Tierney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:18
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |