US2810440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular extension member for wells
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1955-07-25
•
Granted: 1957-10-22
•
Expires: 1975-07-25
Abstract
No abstract record available.
Inventors
- 👤 John W Kenneday
- 👤 Gilbert H Tausch
- 👤 Martin E True
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:09
CPC Classifications
E; E21; E21B; E21B37/00; E21B23/00; E21B23/08; E21B43/00; E21B43/02; E21B43/10; E21B43/101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1608575A
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US1937707A
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US2187347A
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US2205422A
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US2218955A
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US2434239A
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US2543814A
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US2636563A
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US2567009A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |