US2688871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instantaneous bit rate of drilling meters
Assignee: Individual
•
Filing: 1949-01-03
•
Granted: 1954-09-14
•
Expires: 1969-01-03
Abstract
No abstract record available.
Inventors
- 👤 Lubinski Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:21
CPC Classifications
E; E21; E21B; E21B45/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1967111A
Cited
US1925012A
Cited
US2357051A
Cited
US2365014A
Cited
US2390178A
Cited
US2419120A
Cited
US2539758A
Cited
US2455917A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |