US2855685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bore hole apparatus
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1955-01-31
•
Granted: 1958-10-14
•
Expires: 1975-01-31
Abstract
No abstract record available.
Inventors
- 👤 Felix L Barreteau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:11
CPC Classifications
G; G01; G01V; G01V11/00; G01V11/002; G01V11/005; E; E21; E21B; E21B17/00; E21B17/10; E21B17/1014; E21B17/1021; E21B47/00
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) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |