US2728554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for orienting tools in well bores
Assignee: Eastman Oil Well Survey Co
•
Filing: 1952-08-04
•
Granted: 1955-12-27
•
Expires: 1972-08-04
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Goble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:49
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/02; E21B47/024
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE22531E
Cited
US1617397A
Cited
US2327658A
Cited
US2399061A
Cited
US2479982A
Cited
US2546984A
Cited
US2488269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |