US2408012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well logging
Assignee: Standard Oil Development Co
•
Filing: 1942-08-10
•
Granted: 1946-09-24
•
Expires: 1962-08-10
Abstract
No abstract record available.
Inventors
- 👤 Philip S Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:05
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/006
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-09-23 | 1950-03-25 | 1950-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-09-23 | 1954-03-25 | 1954-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-09-23 | 1958-03-25 | 1958-09-24 | $7700.00 | Window Closed / Lapsed |