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Patent US3089158A successfully refreshed from Google Patents.
US3089158A
Expired / Lapsed
US
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Water ski
Assignee: Whittlesey Powers Inc
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Filing: 1961-02-10
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Granted: 1963-05-14
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Expires: 1981-02-10
Abstract
No abstract record available.
Inventors
- 👤 Lawrence G Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:52
CPC Classifications
B; B63; B63B; B63B32/00; B63B32/30; B63B32/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
152 words
A WATER SKI COMPRISING A PAIR OF ELONGATED AND GENERALLY PARALLEL SHEETS OF A MATERIAL HAVING A SPECIFIC GRAVITY GREATER THAN UNITY WITH THE SHEETS DEFINING THE TOP AND BOTTOM OF THE SKI, ONE END OF EACH OF SAID SHEETS BEING CURVED TOWARD THE TOP OF THE SKI TO DEFINE THE FORWARD TIP OF THE SKI, THE SHEET DEFINING THE TOP OF THE SKI HAVING A GENERALLY CENTRAL AREA ADAPTED TO SUPPORT THE FOOT OF A WATER SKIER, GENERALLY RIGID SPACING MEANS BETWEEN SAID SHEETS AND MOUNTING SAID SHEETS TOGETHER WITH THE THICKNESS OF SAID SKI BEING LESS THAN THE WIDTH OF THE SKI, AND A BUOYANCY CAVITY BOUNDED BY SAID SHEETS AND SAID SPACING MEANS WITH SUBSTANTIALLY MORE THAN HALF OF THE VOLUME OF SAID CAVITY POSITIONED BETWEEN SAID FORWARD TIP AND SAID CENTRAL AREA, AND WITH SAID CAVITY HAVING SUFFICIENT VOLUME AND LIGHTNESS THAT SAID SKI WILL FLOAT IN WATER.
References Cited (Backward Citations)
US1104441A
Cited
US1628368A
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FR1013462A
Cited
FR65793E
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US2716246A
Cited
US2933740A
Cited
US2940090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |