US3207981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical device having uniquely posi-tioned electrodes for determining metal loss from tubular members
Assignee: Pure Oil Co
•
Filing: 1960-11-21
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Granted: 1965-09-21
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Expires: 1980-11-21
Abstract
No abstract record available.
Inventors
- 👤 Glenn A Marsh
- 👤 Schaschl Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:47
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
77 words
A SONDE FOR TESTING HOLLOW CYLINDRICAL TUBES COMPRISING AN ELONGATED BODY MEMBER INSERTABLE WITHIN A TUBE; TWO CURRENT ELECTRODES SPACED 180* APART, LYING IN A COMMON PLANE PERPENDICULAR TO THE LONGITUDINAL AXIS OF SAID BODY MEMBER AND PROJECTING RADIALLY FROM SAID BODY MEMBER TO CONTACT THE TUBE INTERIOR; TWO PAIRS OF POTENTIAL-SENSING ELECTRODES PROJECTING RADIALLY FROM SAID BODY MEMBER TO CONTACT THE TUBE INTERIOR AND BEING DISPOSED IN SAID COMMON PLANE, EACH OF SAID PAIRS BEING DIS-
References Cited (Backward Citations)
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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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |