US2746709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blowout preventer and packer and hole closer therefor
Assignee: Regan Forge and Engineering Co
•
Filing: 1951-01-23
•
Granted: 1956-05-22
•
Expires: 1971-01-23
Abstract
No abstract record available.
Inventors
- 👤 Burt S Minor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:44
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/06; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44068
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2176355A
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US1861726A
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US1772210A
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US1872498A
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US1930361A
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US1861755A
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US2182899A
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US2573712A
Cited
US2518625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |