US3650235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hull construction
Assignee: Veritas International
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Filing: 1969-07-31
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Granted: 1972-03-21
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Expires: 1989-07-31
Abstract
Abstract A hull construction for watercraft wherein means are provided for inducing the flow of a plurality of bubbles along the outer surface thereof to reduce frictional resistance to the passage of the watercraft through the water.
Inventors
- 👤 Norman Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:03
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/32; B63B1/34; B63B1/38; B63B2001/387; Y; Y02; Y02T; Y02T70/00; Y02T70/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
A hull construction for watercraft comprising a main wall, an auxiliary wall secured to said man wall, said auxiliary wall having a plurality of longitudinally extending channels defining a plurality of longitudinally extending grooves, a plurality of projections formed in said channels, said projections extending outwardly from said channels and defining a plurality of openings whereby air in said channels is induced to flow through the openings defined by said projections to create a plurality of minute bubbles in said grooves to diminish the frictional resistance of the water with respect to the watercraft, said channels being substantially V-shaped and said projections being formed on the sides of said channels.
Claim 2
Dependent Claim
110 words
A hull construction for watercraft comprising a main wall, an auxiliary wall secured to said man wall, said auxiliary wall having a plurality of longitudinally extending channels defining a plurality of longitudinally extending grooves, a plurality of projections formed in said channels, said projections extending outwardly from said channels and defining a plurality of openings whereby air in said channels is induced to flow through the openings defined by said projections to create a plurality of minute bubbles in said grooves to diminish the frictional resistance of the water with respect to the watercraft, said channels being substantially V-shaped and said projections being formed on the sides of said channels.
Claim 3
Dependent Claim
95 words
A hull construction for watercraft comprising a main wall, an auxiliary wall secured to said main wall, said auxiliary wall having a plurality of longitudinally extending channels defined by a plurality of longitudinally extending grooves extending inwardly from said auxiliary wall, a plurality of projections extending outwardly from said channels and defining a plurality of openings whereby air in said channels is induced to flow through the openings defined by said projections to create a plurality of minute bubbles in said grooves to diminish the frictional resistance of the water with respect to the watercraft.
Claim 4
Dependent Claim
95 words
A hull construction for watercraft comprising a main wall, an auxiliary wall secured to said main wall, said auxiliary wall having a plurality of longitudinally extending channels defined by a plurality of longitudinally extending grooves extending inwardly from said auxiliary wall, a plurality of projections extending outwardly from said channels and defining a plurality of openings whereby air in said channels is induced to flow through the openings defined by said projections to create a plurality of minute bubbles in said grooves to diminish the frictional resistance of the water with respect to the watercraft.
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) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |