US3526831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for tracking underwater pipelines and detecting flaws in the coating thereof
Assignee: Boeing North American Inc
•
Filing: 1968-11-21
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Granted: 1970-09-01
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Expires: 1988-11-21
Abstract
No abstract record available.
Inventors
- 👤 Donald E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:57
CPC Classifications
G; G01; G01N; G01N17/00; G01N17/02; F; F16; F16L; F16L2101/00; F16L2101/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1297929A
Cited
US1344074A
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GB188676A
Cited
US1696230A
Cited
US1745419A
Cited
US3020470A
Cited
US2834113A
Cited
US3066256A
Cited
US3052837A
Cited
US3338059A
Cited
US3418572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-31 | 1974-03-02 | 1974-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-31 | 1978-03-02 | 1978-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-31 | 1982-03-02 | 1982-09-01 | $7700.00 | Window Closed / Lapsed |