US3515654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for regulating supplied current in cathodic protection
Assignee: Sentralinstitutt for Industriell Forskning
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Filing: 1965-05-25
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Granted: 1970-06-02
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Expires: 1985-05-25
Abstract
No abstract record available.
Inventors
- 👤 Knut Bordalen
- 👤 Eilif Risberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:48
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C23F13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US669922A
Cited
US2758080A
Cited
US2882213A
Cited
GB819548A
Cited
US3182007A
Cited
US3037926A
Cited
US3196101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |