US3139732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boat stabilizing and lifting device
Assignee: Individual
•
Filing: 1961-05-05
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Granted: 1964-07-07
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Expires: 1981-05-05
Abstract
No abstract record available.
Inventors
- 👤 Walter A Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:35
CPC Classifications
E; E02; E02C; E02C5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A SMALL BOAT-STABLIZING AND LIFTING DEVICE, COMPRISING A PAIR OF FRONT AND REAR BOAT-LIFTING CRADLES SPACED FROM EACH OTHER FOR RESPECTIVELY UNDERLYING THE FRONT AND REAR PORTIONS OF A BOAT, A SUPPORTING STRUCTURE CONSTRUCTED TO PERMIT A BOAT TO BE FLOATED INTO OVERLYING RELATION WITH THE CRADLES, MEANS MOVABLY MOUNTING THE CRADLES ON THE SUPPORTING STRUCTURE FOR UPWARD AND DOWNWARD MOVEMENT, STOP MEANS ON THE FRAME FOR NORMALLY SUPPORTING THE CRADLES, A PAIR OF FRONT AND REAR LINKAGES EACH INCLUDING A FIRST VERTICALLY SWINGABLE LINK, A PAIR OF FIRST PIVOTS SWINGABLY MOUNTING SAID FIRST LINKS ON THE FRAME, EACH OF SAID LINKAGES ALSO INCLUDING A SECOND VERTICALLY SWINGABLE LINK HAVING AN UPPER END PIVOTED ON THE RESPECTIVE CRADLE AND HAVING A LOWER END DISPOSED BELOW SAID FIRST PIVOT AND SWINGABLY SECURED TO THE FIRST LINK, SAID FIRST LINK OF THE REAR LINKAGE EXTENDING DIAGONALLY DOWNWARDLY TO CAUSE RAPID UPWARD MOVE-
Claim 2
Dependent Claim
150 words
A SMALL BOAT-STABLIZING AND LIFTING DEVICE, COMPRISING A PAIR OF FRONT AND REAR BOAT-LIFTING CRADLES SPACED FROM EACH OTHER FOR RESPECTIVELY UNDERLYING THE FRONT AND REAR PORTIONS OF A BOAT, A SUPPORTING STRUCTURE CONSTRUCTED TO PERMIT A BOAT TO BE FLOATED INTO OVERLYING RELATION WITH THE CRADLES, MEANS MOVABLY MOUNTING THE CRADLES ON THE SUPPORTING STRUCTURE FOR UPWARD AND DOWNWARD MOVEMENT, STOP MEANS ON THE FRAME FOR NORMALLY SUPPORTING THE CRADLES, A PAIR OF FRONT AND REAR LINKAGES EACH INCLUDING A FIRST VERTICALLY SWINGABLE LINK, A PAIR OF FIRST PIVOTS SWINGABLY MOUNTING SAID FIRST LINKS ON THE FRAME, EACH OF SAID LINKAGES ALSO INCLUDING A SECOND VERTICALLY SWINGABLE LINK HAVING AN UPPER END PIVOTED ON THE RESPECTIVE CRADLE AND HAVING A LOWER END DISPOSED BELOW SAID FIRST PIVOT AND SWINGABLY SECURED TO THE FIRST LINK, SAID FIRST LINK OF THE REAR LINKAGE EXTENDING DIAGONALLY DOWNWARDLY TO CAUSE RAPID UPWARD MOVE-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |