Patent US3061728A successfully refreshed from Google Patents.
US3061728A
Expired / Lapsed
US
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Well logging apparatus
Assignee: Schlumberger Well Surveying Corp
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Filing: 1958-11-12
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Granted: 1962-10-30
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Expires: 1978-11-12
Abstract
No abstract record available.
Inventors
- 👤 Wayne R Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:02
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB519821A
Cited
US2320559A
Cited
US2689918A
Cited
US2711084A
Cited
US2829271A
Cited
US2756350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |