US3411576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well tools
Assignee: Otis Engineering Corp
•
Filing: 1965-07-02
•
Granted: 1968-11-19
•
Expires: 1985-07-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Donald F Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:28
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/02; E21B34/04; E21B34/045; E21B33/00; E21B33/02; E21B33/03; E21B33/035; E21B41/00; E21B41/0007; E21B43/00; E21B43/01; E21B2200/00; E21B2200/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE540029A
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US2179033A
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US2785755A
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US2894715A
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US3087547A
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US3170518A
Cited
US3094170A
Cited
US3137348A
Cited
US3189098A
Cited
US3280908A
Cited
US3310107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |