Patent US3137262A successfully refreshed from Google Patents.
US3137262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-lift boat
Assignee: Tibbetts Industries Inc
•
Filing: 1960-09-30
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Granted: 1964-06-16
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Expires: 1980-09-30
Abstract
No abstract record available.
Inventors
- 👤 Raymond W Tibbetts
- 👤 Joseph A Sawyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:33
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/32; B63B1/34; B63B1/38; Y; Y02; Y02T; Y02T70/00; Y02T70/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A VEHICLE COMPRISING A HULL HAVING SIDES AND A BOTTOM, FINS PROJECTING DOWNWARDLY ALONG OPPOSITE SIDES OF SAID BOTTOM TO FORM AN AIR SPACE THEREBETWEEN, EACH OF SAID FINS BEING HOLLOW AND TERMINATING IN AN INWARDLY DIRECTED OUTLET, MEANS SUBSTANTIALLY BRIDGING SAID FINS TO CLOSE THE ENDS OF SAID SPACE, SAID BOTTOM HAVING AN OUTWARDLY DIRECTED ELONGATE SLOT EXTENDING LENGTHWISE OF THE HULL INBOARD OF EACH OF SAID FINS, THE MOUTH OF EACH SAID ELONGATE SLOT BEING DISPOSED ABOVE THE LEVEL OF THE LOWER EDGES OF SAID FINS, AND MEANS PROJECTING A CURTAIN OF
Claim 2
Dependent Claim
94 words
A VEHICLE COMPRISING A HULL HAVING SIDES AND A BOTTOM, FINS PROJECTING DOWNWARDLY ALONG OPPOSITE SIDES OF SAID BOTTOM TO FORM AN AIR SPACE THEREBETWEEN, EACH OF SAID FINS BEING HOLLOW AND TERMINATING IN AN INWARDLY DIRECTED OUTLET, MEANS SUBSTANTIALLY BRIDGING SAID FINS TO CLOSE THE ENDS OF SAID SPACE, SAID BOTTOM HAVING AN OUTWARDLY DIRECTED ELONGATE SLOT EXTENDING LENGTHWISE OF THE HULL INBOARD OF EACH OF SAID FINS, THE MOUTH OF EACH SAID ELONGATE SLOT BEING DISPOSED ABOVE THE LEVEL OF THE LOWER EDGES OF SAID FINS, AND MEANS PROJECTING A CURTAIN OF
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |