Patent US3957008A successfully refreshed from Google Patents.
US3957008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drag reduction of water vehicles using gas created by electrolysis on electrodes attached to the hull
Assignee: Individual
•
Filing: 1974-03-28
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Granted: 1976-05-18
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Expires: 1994-03-28
Abstract
Abstract Discrete bubbles of hydrogen and other gases are electrolytically created at line sources that are distributed transversely of a vehicle's centerline; the bubbles interact with the boundary layer next to the hull to reduce both skin friction and turbulent drag on the hull in the water.
Inventors
- 👤 Michael E. McCormick
- 👤 Rameswar Bhattacharyya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:55
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: 8
Claim 1
Independent Claim
47 words
The method of reducing the drag of a marine vessel by introducing a gas into the boundary layer water along a marine vessel's hull which comprises: placing discrete electrically conductive members to extend along said hull transversely of the centerline of said hull and electrolyzing the water.
Claim 2
Independent Claim
47 words
The method of reducing the drag of a marine vessel by introducing a gas into the boundary layer water along a marine vessel's hull which comprises: placing discrete electrically conductive members to extend along said hull transversely of the centerline of said hull and electrolyzing the water.
Claim 3
Dependent Claim
21 words
The method of claim 1 including arranging said electrically conductive members in pairs, each pair comprising an anode and a cathode.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein said electrically conductive members are approximately 0.006 inches wide.
Claim 5
Dependent Claim
49 words
A marine vessel comprising: A hull whose outer surface is designed to be at least partially in contact with water; and discrete electrically conductive members for producing a gas for reducing the drag of a marine vessel extending along said outer surface transversely of the centerline of said hull.
Claim 6
Dependent Claim
49 words
A marine vessel comprising: A hull whose outer surface is designed to be at least partially in contact with water; and discrete electrically conductive members for producing a gas for reducing the drag of a marine vessel extending along said outer surface transversely of the centerline of said hull.
Claim 7
Dependent Claim
24 words
A marine vessel as in claim 4 wherein said discrete electrically conductive members are in pairs, each pair comprising an anode and a cathode.
Claim 8
Dependent Claim
17 words
A marine vessel as in claim 4 wherein said electrically conductive members are approximately 0.006 inches wide.
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) | 1979-05-18 | 1979-11-17 | 1980-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-18 | 1983-11-17 | 1984-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-18 | 1987-11-17 | 1988-05-18 | $7700.00 | Window Closed / Lapsed |