Patent US3422900A successfully refreshed from Google Patents.
US3422900A
Expired / Lapsed
US
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Pressure assisted retrievable bridge plug
Assignee: Halliburton Co
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Filing: 1966-12-30
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Granted: 1969-01-21
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Expires: 1986-12-30
Abstract
No abstract record available.
Inventors
- 👤 Walter E Hyde
- 👤 David L Farley
- 👤 John C Holden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:16
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1294
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3308886A
Cited
US3288219A
Cited
US3338308A
Cited
US3361207A
Cited
US3339637A
Cited
US3356142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |