US3550075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for displaying time information in acoustic well logging system
Assignee: Mobil Oil AS
•
Filing: 1968-10-24
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Granted: 1970-12-22
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Expires: 1988-10-24
Abstract
No abstract record available.
Inventors
- 👤 Douglas W Hilchie
- 👤 Joseph Zemanek Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:28
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/44; E; E21; E21B; E21B47/00; E21B47/002; E21B47/0025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2631270A
Cited
US3093810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |