US2677790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Borehole logging by intermittent signaling
Assignee: Individual
•
Filing: 1951-12-05
•
Granted: 1954-05-04
•
Expires: 1971-12-05
Abstract
No abstract record available.
Inventors
- 👤 Jan J Arps
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:19
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/34; E; E21; E21B; E21B47/00; E21B47/12; E21B47/14; E21B47/18; E21B47/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2476137A
Cited
US2573137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |