US3191572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduced friction hull construction for power boats
Assignee: Individual
•
Filing: 1963-08-21
•
Granted: 1965-06-29
•
Expires: 1983-08-21
Abstract
No abstract record available.
Inventors
- 👤 Wilson Henry Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:31
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/32; B63B1/34; B63B1/38; Y; Y02; Y02T; Y02T70/00; Y02T70/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
134 words
A BOAT HAVING A TRIPARTITE BOTTOM STRUCTURE HAVING LATERALLY SPACED LONGITUDINALLY EXTENDING GENERALLY CONVEX HULL PORTIONS IN TRANSVERSE CROSS SECTION, THE CENTRAL HULL PORTION BEING GREATER WIDTH THAN THE OTHERS, SAID HULL PORTIONS BEING SPACED THROUGHOUT THEIR LENGTH BY CONNECTING CONCAVED CHINES, SAID CENTRAL HULL PORTION HAVING A RELATIVELY FLAT SKI-LIKE BOTTOM EXTENDING THROUGHOUT THE MAJOR LENGTH THEREOF, DOWNWARDLY EXTENDING RAIL-LIKE KEELS FLANKING OPPOSITE SIDES OF SAID BOTTOM, AND MEANS FOR INTRODUCING AIR BETWEEN SAID HULL PORTIONS DURING PROPULSION OF THE BOAT AND MEANS FOR INTRODUCING OTHER AIR UNDER PRESSURE TO THE UNDERSIDE OF SAID BOTTOM BETWEEN SAID KEELS WHEREBY THE OTHER AIR UNDER PRESSURE SERVES TO REDUCE THE FRICTION DRAG WITH THE WATER DURING STARTING AND THE AIR INTRODUCED BETWEEN THE HULLS SERVES TO RAISE THE REDUCE THE DRAG DURING HIGH SPEED TRAVEL.
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) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |