Patent US3488659A successfully refreshed from Google Patents.
US3488659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatus for recording well logging signals
Assignee: Schlumberger Technology Corp
•
Filing: 1967-12-27
•
Granted: 1970-01-06
•
Expires: 1987-12-27
Abstract
No abstract record available.
Inventors
- 👤 Theodore F Brunn
- 👤 Jimmy G Lee
- 👤 John A Stafford
- 👤 William J Sloughter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:19
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/14; E; E21; E21B; E21B47/00; G01V; G01V1/00; G01V1/40; G01V1/44
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE25928E
Cited
US3389403A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |