Patent US3409082A successfully refreshed from Google Patents.
US3409082A
Expired / Lapsed
US
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Process for stimulating petroliferous subterranean formations with contained nuclear explosions
Assignee: ConocoPhillips Co
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Filing: 1964-04-20
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Granted: 1968-11-05
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Expires: 1984-04-20
Abstract
No abstract record available.
Inventors
- 👤 Bruce G Bray
- 👤 Carroll F Knutson
- 👤 Henry F Coffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:37
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/263; E21B43/2635
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |