Patent US3220475A successfully refreshed from Google Patents.
US3220475A
Expired / Lapsed
US
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Method for fluid pressure fracturing of formation and fluid recovery therefrom
Assignee: Individual
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Filing: 1963-10-11
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Granted: 1965-11-30
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Expires: 1983-10-11
Abstract
No abstract record available.
Inventors
- 👤 Clarence W Brandon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:23
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
66 words
A METHOD OF FRACTURING A SUBTERRANEAN PETROLIFEROUS PRODUCING FORMATION PENETRATED BY A WELL BORE, SAID FORMATION RELATIVELY BRITTLE AND CONTIGUOUS TO A NON-PRODUCING DEFORMABLE STRATUM, COMPRISING PACKING OFF SAID WELL BORE TO ISOLATE AND CONFINE A PORTION OF SAID DEFORMABLE STRATUM FROM SAID PRODUCING FORMATION, AND SUPPLYING FLUID UNDER SUFFICIENT PRESSURE THROUGH SAID WELL BORE TO SAID CONFINED PORTION TO CAUSE FRACTURING OF SAID BRITTLE FORMATION.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |