US3462240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic apparatus for examining a pipeline for leaks
Assignee: Shell USA Inc
•
Filing: 1967-06-22
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Granted: 1969-08-19
•
Expires: 1987-06-22
Abstract
No abstract record available.
Inventors
- 👤 Hendrik Bosselaar
- 👤 Arnoldus J Van Riemsdijk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:58
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/005; G01M3/02; G01M3/04; G01M3/24; G01M3/243; G01M3/246; G01N; G01N29/00; G01N29/14; F; F16; F16L; F16L2101/00; F16L2101/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3126449A
Cited
US2996613A
Cited
US2884624A
Cited
US3112452A
Cited
US3076939A
Cited
US3192166A
Cited
US3268824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |