US3518609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telemetry drill pipe with ring-control electrode means
Assignee: Shell USA Inc
•
Filing: 1968-10-28
•
Granted: 1970-06-30
•
Expires: 1988-10-28
Abstract
No abstract record available.
Inventors
- 👤 John E Fontenot Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:30
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/46; H01R13/52; H01R13/523; E; E21; E21B; E21B17/00; E21B17/02; E21B17/028; E21B17/0285; E21B47/00; E21B47/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |