US2497990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for logging boreholes
Assignee: Standard Oil Development Co
•
Filing: 1946-11-30
•
Granted: 1950-02-21
•
Expires: 1966-11-30
Abstract
No abstract record available.
Inventors
- 👤 Theodore A Huber
- 👤 George E Cannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:03
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1339955A
Cited
US1708354A
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US2102080A
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US2150070A
Cited
US2267110A
Cited
US2340987A
Cited
US2398562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |