US2492794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of and apparatus for transmitting intelligence to the surface from well bores
Assignee: Eastman Oil Well Survey Co
•
Filing: 1944-08-28
•
Granted: 1949-12-27
•
Expires: 1964-08-28
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Goble
- 👤 Jackson Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:30
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/02; E21B47/12; E21B47/13; E21B7/00; E21B7/04; E21B7/06; E21B7/061
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |