Patent US3435629A successfully refreshed from Google Patents.
US3435629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Borehole logging technique
Assignee: Schlumberger Technology Corp
•
Filing: 1967-04-13
•
Granted: 1969-04-01
•
Expires: 1987-04-13
Abstract
No abstract record available.
Inventors
- 👤 James K Hallenburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:38
CPC Classifications
F; F25; F25B; F25B23/00; E; E21; E21B; E21B36/00; E21B36/001; E21B47/00; E21B47/01; E21B47/017; E21B47/0175
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2106591A
Cited
US2189122A
Cited
US2521294A
Cited
US2671323A
Cited
US2782318A
Cited
US2714169A
Cited
US3038074A
Cited
US3112890A
Cited
US3167653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |