US3419040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill pipe valve having means for rendering it temporarily inoperative
Assignee: EDWARD J THIBODEAUX
•
Filing: 1966-12-27
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Granted: 1968-12-31
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Expires: 1986-12-27
Abstract
No abstract record available.
Inventors
- 👤 Edward J Thibodeaux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:59
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/10; F; F16; F16K; F16K15/00; F16K15/18; F16K15/182; F16K17/00; F16K17/02; F16K17/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7854; Y10T137/7857; Y10T137/7866; Y10T137/7867; Y10T137/7868; Y10T137/7876; Y10T137/7877; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7932; Y10T137/7933
Claims Analysis
Total Claims: 0
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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) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |