US3830719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathodic protection system for marine propulsion unit
Assignee: Outboard Marine Corp
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Filing: 1971-12-03
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Granted: 1974-08-20
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Expires: 1991-12-03
Abstract
Abstract Disclosed herein is a cathodic protection system for the immersed surfaces of a marine propulsion device which includes a power supply, an anode supported on the boat hull below the water surface, and a transistor connected between the power supply and anode. Current flow through the transistor is regulated by a monitoring circuit stage which includes a reference electrode supported on the boat hull below the water surface. The circuit components are contained in a circuit module which is located in a housing below the water surface and which also supports one of the electrodes in a position exposed to the sea water.
Inventors
- 👤 D Cavil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:42
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C23F13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |