US3284789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathodic protection system detector
Assignee: Tinker & Rasor
•
Filing: 1963-03-19
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Granted: 1966-11-08
•
Expires: 1983-03-19
Abstract
No abstract record available.
Inventors
- 👤 Robert B Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:29
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C23F13/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
A MONITORING APPARATUS FOR USE WITH A SYSTEM OF PIPELINES, CABLES, OR THE LIKE, BURIED IN THE EARTH AND TO WHICH SYSTEM A SOURCE OF CATHODIC PROTECTION POTENTIAL IS APPLIED FOR THE CATHODIC PROTECTION OF THE SYSTEM, SAID MONITORING APPARATUS COMPRISING: AN OSCILLATOR, AND MEANS FOR CONNECTING THE OSCILLATOR TO A SYSTEM TO WHICH A SOURCE OF CATHODIC PROTECTION POTENTIAL IS APPLIED FOR ENERGIZATION OF THE OSCILLATOR BY THE CATHODIC PROTECTION POTENTIAL, SAID OSCILLATOR OSCILLATING WITH BIAS POTENTIALS SUPPLIED SOLELY BY THE CATHODIC PROTECTION POTENTIAL, SAID OSCILLATOR BEING OPERABLE WHEN THE CATHODIC PROTECTION POTENTIAL IS ABOVE A PREDETERMINED VALUE HIGHER THAN
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |