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US3045752A
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Milling apparatus for removing objects from well bores
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1958-03-25
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Granted: 1962-07-24
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Expires: 1978-03-25
Abstract
No abstract record available.
Inventors
- 👤 Julian D Keithahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:44
CPC Classifications
E; E21; E21B; E21B31/00; E21B31/12; E21B31/16; E21B23/00; E21B23/06; E21B29/00; E21B31/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1917310A
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US2167445A
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US2379394A
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US2481637A
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US2804148A
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US2869644A
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US2904114A
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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) | 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 |