Patent US3331456A successfully refreshed from Google Patents.
US3331456A
Expired / Lapsed
US
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Apparatus for straightening large diameter holes by fluid erosion
Assignee: Halliburton Co
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Filing: 1964-11-13
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Granted: 1967-07-18
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Expires: 1984-11-13
Abstract
No abstract record available.
Inventors
- 👤 Forrest C Pittman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:54
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/10; E21B7/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1644560A
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US1661672A
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US1859490A
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US2217360A
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US2678203A
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US2602003A
Cited
US2785875A
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US3130786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |