US3045757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubing anchor
Assignee: Baker Hughes Oilfield Operations LLC
•
Filing: 1960-10-17
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Granted: 1962-07-24
•
Expires: 1980-10-17
Abstract
No abstract record available.
Inventors
- 👤 Martin B Conrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:39
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1532670A
Cited
US2002140A
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US2167591A
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US2127900A
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US2122742A
Cited
US2329939A
Cited
US2427330A
Cited
US2589337A
Cited
US2756827A
Cited
US2829717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |