US2940370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bottom hole camera
Assignee: Individual
•
Filing: 1958-12-11
•
Granted: 1960-06-14
•
Expires: 1978-12-11
Abstract
No abstract record available.
Inventors
- 👤 James L Yandell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:43
CPC Classifications
G; G01; G01V; G01V8/00; G01V8/02; E; E21; E21B; E21B47/00; E21B47/002; G03; G03B; G03B37/00; G03B37/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1658537A
Cited
US2677996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |