US3496999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-contained benthonic blowout prevention control apparatus and method
Assignee: Atlantic Richfield Co
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Filing: 1967-12-26
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Granted: 1970-02-24
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Expires: 1987-12-26
Abstract
No abstract record available.
Inventors
- 👤 Paul Robert Rowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:44
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/06; E21B33/064; E21B33/035; E21B33/0355
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3186486A
Cited
US3064735A
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US3211223A
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US3199595A
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US3219118A
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US3163224A
Cited
US3339632A
Cited
US3338302A
Cited
US3405387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |