US2554844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casing collar locator
Assignee: Well Surveys Inc
•
Filing: 1946-03-22
•
Granted: 1951-05-29
•
Expires: 1966-03-22
Abstract
No abstract record available.
Inventors
- 👤 Lawrence M Swift
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:44
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/26; E; E21; E21B; E21B47/00; E21B47/09; E21B47/092
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |