Patent US3932206A successfully refreshed from Google Patents.
Patent US3464513A successfully refreshed from Google Patents.
US3464513A
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Acoustic apparatus for mapping the surface characteristics of a borehole
Assignee: Shell USA Inc
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Filing: 1968-04-24
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Granted: 1969-09-02
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Expires: 1988-04-24
Abstract
No abstract record available.
Inventors
- 👤 William L Roever
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:06
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/52; E; E21; E21B; E21B47/00; E21B47/08; E21B47/085; G10; G10K; G10K11/00; G10K11/18; G10K11/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2206923A
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US2433368A
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US2602893A
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US2825044A
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US3021706A
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GB928583A
Cited
US3138219A
Cited
US3369626A
Cited
US3390737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |