Patent US2284866A successfully refreshed from Google Patents.
Patent US3249536A successfully refreshed from Google Patents.
US3249536A
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Selective acidizing
Assignee: Pan American Petroleum Corp
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Filing: 1962-12-26
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Granted: 1966-05-03
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Expires: 1982-12-26
Abstract
No abstract record available.
Inventors
- 👤 Loyd W Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:13
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72; Y; Y10; Y10S; Y10S507/00; Y10S507/933
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS FOR ACIDIZING AN OIL-BEARING CALCAREOUS FORMATION PENETRATED BY A WELL COMPRISING INJECTING THROUGH SAID WELL AND INTO SAID FORMATION AN AQUEOUS SOLUTION HAVING A PH BETWEEN ABOUT 4 AND ABOUT 8 AND CONTAINING FROM ABOUT 5 TO ABOUT 30 PERCENT BY WEIGHT OF HYPOCHLOROUS ACID, AND SEPARATELY INJECTING INTO SAID FORMATION AN OIL SOLUTION OF AN OIL-SOLUBLE REDUCING AGENT CAPABLE OF REACTING WITH SAID HYPOCHLOROUS ACID TO PRODUCE HYDROCHLORIC ACID.
Claim 2
Dependent Claim
72 words
A PROCESS FOR ACIDIZING AN OIL-BEARING CALCAREOUS FORMATION PENETRATED BY A WELL COMPRISING INJECTING THROUGH SAID WELL AND INTO SAID FORMATION AN AQUEOUS SOLUTION HAVING A PH BETWEEN ABOUT 4 AND ABOUT 8 AND CONTAINING FROM ABOUT 5 TO ABOUT 30 PERCENT BY WEIGHT OF HYPOCHLOROUS ACID, AND SEPARATELY INJECTING INTO SAID FORMATION AN OIL SOLUTION OF AN OIL-SOLUBLE REDUCING AGENT CAPABLE OF REACTING WITH SAID HYPOCHLOROUS ACID TO PRODUCE HYDROCHLORIC ACID.
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |