US3080920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for fracturing formations
Assignee: Pan American Petroleum Corp
•
Filing: 1959-06-17
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Granted: 1963-03-12
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Expires: 1979-06-17
Abstract
No abstract record available.
Inventors
- 👤 Clarence R Fast
- 👤 Iii Robert B Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:20
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; Y; Y10; Y10S; Y10S507/00; Y10S507/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A METHOD FOR FRACTURING A PREFERENTIALLY OIL-WETTABLE OIL-PRODUCING FORMATION PENETRATED BY A WELL COMPRISING INJECTING INTO SAID FORMATION AN AQUEOUS SOLUTION OF AN AGENT CAPABLE OF MAKING SAID FORMATION WATER-WET, NEXT INJECTING INTO SAID FORMATION A BATCH OF MINERAL OIL, AND FINALLY INJECTING INTO SAID FORMATION AN AQUEOUS FRACTURING LIQUID UNDER A PRESSURE SUFFICIENT TO FRACTURE SAID FORMATION.
Claim 2
Independent Claim
58 words
A METHOD FOR FRACTURING A PREFERENTIALLY OIL-WETTABLE OIL-PRODUCING FORMATION PENETRATED BY A WELL COMPRISING INJECTING INTO SAID FORMATION AN AQUEOUS SOLUTION OF AN AGENT CAPABLE OF MAKING SAID FORMATION WATER-WET, NEXT INJECTING INTO SAID FORMATION A BATCH OF MINERAL OIL, AND FINALLY INJECTING INTO SAID FORMATION AN AQUEOUS FRACTURING LIQUID UNDER A PRESSURE SUFFICIENT TO FRACTURE SAID FORMATION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |