US3306246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Watercraft
Assignee: Vereinigte Flugtechnische Werke GmbH
•
Filing: 1966-02-11
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Granted: 1967-02-28
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Expires: 1986-02-11
Abstract
No abstract record available.
Inventors
- 👤 Reder Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:47
CPC Classifications
B; B63; B63H; B63H5/00; B63H5/07; B63H5/08; B63B; B63B1/00; B63B1/16; B63B1/18; B63B1/24; B63B1/28; B63B1/32; B63B1/322; B63G; B63G8/00; B63H5/125; Y; Y02; Y02T; Y02T70/00; Y02T70/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
IN COMBINATION WITH A WATERCRAFT HAVING A HULL AND BEING FREE FROM NORMALLY SUBMERGED HYDROFOILS: STRUT MEANS CONNECTED TO AND EXTENDING DOWNWARDLY FROM SAID HULL, A PLURALITY OF TANGENTIAL LIFT FORCE PROPELLER MEANS CONNECTED TO SAID STRUT MEANS BELOW SAID HULL FOR SUBMERSION IN WATER DURING THE OPERATION OF SAID WATERCRAFT, MECHANICAL DRIVING MEANS, SOME OF SAID TANGENTIAL LIFT FORCE PROPELLER MEANS BEING AUTOROTATING BY THEIR MOVEMENT THROUGH THE WATER FOR DELIVERING THE MAIN LIFTING
Claim 2
Dependent Claim
75 words
IN COMBINATION WITH A WATERCRAFT HAVING A HULL AND BEING FREE FROM NORMALLY SUBMERGED HYDROFOILS: STRUT MEANS CONNECTED TO AND EXTENDING DOWNWARDLY FROM SAID HULL, A PLURALITY OF TANGENTIAL LIFT FORCE PROPELLER MEANS CONNECTED TO SAID STRUT MEANS BELOW SAID HULL FOR SUBMERSION IN WATER DURING THE OPERATION OF SAID WATERCRAFT, MECHANICAL DRIVING MEANS, SOME OF SAID TANGENTIAL LIFT FORCE PROPELLER MEANS BEING AUTOROTATING BY THEIR MOVEMENT THROUGH THE WATER FOR DELIVERING THE MAIN LIFTING
References Cited (Backward Citations)
US3125981A
Cited
GB190900431A
Cited
US1750959A
Cited
US2408798A
Cited
US2749870A
Cited
US2873710A
Cited
US3077173A
Cited
US3146751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |