US3407886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for wellbore telemetering
Assignee: Sperry Sun Inc
•
Filing: 1965-09-23
•
Granted: 1968-10-29
•
Expires: 1985-09-23
Abstract
No abstract record available.
Inventors
- 👤 John D Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:03
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/089; E21B17/00; E21B17/02; E21B17/04; E21B17/07; E21B44/00; E21B44/005; E21B47/00; E21B47/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1935105A
Cited
US2274339A
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US2728557A
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US3058532A
Cited
US3233689A
Cited
US3158208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |