US3081728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrofoil craft
Assignee: Bullard Co
•
Filing: 1960-07-15
•
Granted: 1963-03-19
•
Expires: 1980-07-15
Abstract
No abstract record available.
Inventors
- 👤 Meredith W Wilterdink
- 👤 Thomas F Hursen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:03
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/16; B63B1/24; B63B1/28; B63B1/30; B63B1/242; B63B1/246; B63B1/26; B63B1/285
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
IN A HYDROFOIL CRAFT, A HULL; STRUTS ON EACH SIDE OF SAID HULL MOUNTED FOR PIVOTAL MOVEMENT ABOUT AN AXIS AT RIGHT ANGLES TO THE LONGITUDINAL CENTERLINE OF SAID HULL; A UNITARY TOTALLY SUBMERGED FOIL MEANS INTEGRALLY CONNECTED TO SAID STRUTS, EXTENDING FROM ONE TO THE OTHER, LOCATED IN CLOSE PROXIMITY TO THE HULL AND HAVING A RELATIVELY LARGE SURFACE AREA; INDIVIDUAL TOTALLY SUBMERGED FOIL MEANS FIXED TO THE LOWERMOST END OF SAID STRUTS AND HAVING A SURFACE AREA CONSISTENT WITH SUPPORTING SAID CRAFT AT RATED SPEED; INDIVIDUAL DIHEDRAL FOIL MEANS FIXED TO EACH OF SAID STRUTS BETWEEN SAID FIRST AND SECOND MENTIONED FOIL MEANS; AND A HYDROFOIL SYSTEM AT THE STERN OF SAID CRAFT MOUNTED FOR PIVOTAL MOVEMENT ABOUT AN AXIS AT RIGHT ANGLES TO THE LONGITUDINAL CENTERLINE OF SAID HULL, SAID STERN SYSTEM INCLUDING A SECTION OSCILLATABLE ABOUT THE LONGITUDINAL AXIS OF SAID STERN STRUT SYSTEM.
Claim 2
Dependent Claim
148 words
IN A HYDROFOIL CRAFT, A HULL; STRUTS ON EACH SIDE OF SAID HULL MOUNTED FOR PIVOTAL MOVEMENT ABOUT AN AXIS AT RIGHT ANGLES TO THE LONGITUDINAL CENTERLINE OF SAID HULL; A UNITARY TOTALLY SUBMERGED FOIL MEANS INTEGRALLY CONNECTED TO SAID STRUTS, EXTENDING FROM ONE TO THE OTHER, LOCATED IN CLOSE PROXIMITY TO THE HULL AND HAVING A RELATIVELY LARGE SURFACE AREA; INDIVIDUAL TOTALLY SUBMERGED FOIL MEANS FIXED TO THE LOWERMOST END OF SAID STRUTS AND HAVING A SURFACE AREA CONSISTENT WITH SUPPORTING SAID CRAFT AT RATED SPEED; INDIVIDUAL DIHEDRAL FOIL MEANS FIXED TO EACH OF SAID STRUTS BETWEEN SAID FIRST AND SECOND MENTIONED FOIL MEANS; AND A HYDROFOIL SYSTEM AT THE STERN OF SAID CRAFT MOUNTED FOR PIVOTAL MOVEMENT ABOUT AN AXIS AT RIGHT ANGLES TO THE LONGITUDINAL CENTERLINE OF SAID HULL, SAID STERN SYSTEM INCLUDING A SECTION OSCILLATABLE ABOUT THE LONGITUDINAL AXIS OF SAID STERN STRUT SYSTEM.
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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) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |