US2992390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for electrical testing of pipe
Assignee: ConocoPhillips Co
•
Filing: 1956-06-18
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Granted: 1961-07-11
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Expires: 1976-06-18
Abstract
No abstract record available.
Inventors
- 👤 Witte Leendert De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:45
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/02; G01B7/06; G01B7/10; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9046; F; F16; F16L; F16L2101/00; F16L2101/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2104643A
Cited
US2311715A
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US2337231A
Cited
US2573799A
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US2595380A
Cited
US2744233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |