Patent US2952319A successfully refreshed from Google Patents.
US2952319A
Expired / Lapsed
US
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Method of verttcally fracturing cased wells
Assignee: ConocoPhillips Co
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Filing: 1956-06-25
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Granted: 1960-09-13
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Expires: 1976-06-25
Abstract
No abstract record available.
Inventors
- 👤 Popham Jack Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:52
CPC Classifications
F; F42; F42D; F42D1/00; E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/263
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2630182A
Cited
US2699212A
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US2690325A
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US2642142A
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US2547778A
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US2766828A
Cited
US2754910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |