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US3635813A
Expired / Lapsed
US
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Anode system for cathodic protection of stretched chain
Assignee: United States Department of the Navy
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Filing: 1969-03-03
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Granted: 1972-01-18
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Expires: 1989-03-03
Abstract
Abstract The invention comprises cathodic protection against corrosion of stretched chain immersed in an electrolyte (sea water) in which sacrificial anodes of pure zinc are cast onto independent and spaced links of the chain. In order to ensure electrical continuity between adjacent links, a cable may be stretched therealong connecting each link to the spaced anodes. Thus when the chains are positioned in water having a high conductivity, e.g., sea water, the sacrificial anodes are consumed and an electrical current passes along the chain links so as to produce electrical potential and cathodically protect the chain from corrosion.
Inventors
- 👤 Richard W Drisko
- 👤 Earl J Kiefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:29
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; F; F16; F16G; F16G13/00; F16G13/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
In combination with stretched chain for utilization in aqueous environments, the improvement in cathodic protection comprising: a metal anode located on said chain and having a higher electronegative value than the interconnected links of the chain, and; a wire which is woven throughout the length of the chain, said wire being attached to each link to provide a low-resistance metal contact thus effecting a countercurrent through the length of the chain and providing adequate cathodic protection thereto.
Claim 2
Dependent Claim
77 words
In combination with stretched chain for utilization in aqueous environments, the improvement in cathodic protection comprising: a metal anode located on said chain and having a higher electronegative value than the interconnected links of the chain, and; a wire which is woven throughout the length of the chain, said wire being attached to each link to provide a low-resistance metal contact thus effecting a countercurrent through the length of the chain and providing adequate cathodic protection thereto.
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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |