US2800962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface-active agents in well treating
Assignee: Pan American Petroleum Corp
•
Filing: 1954-01-15
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Granted: 1957-07-30
•
Expires: 1974-01-15
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Garst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:49
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
AN IMPROVED WATER DRIVE PROCESS FOR RECOVERING THE OIL FORM OIL-BEARING FORMATIONS COMPRISING INJECTING INTO THE FORMATION THROUGH A FIRST WELL A BATCH OF WATER CONTAINING FROM ABOUT 0.01 TO 1 PERCENT BY WEIGHT OF A FIRST TYPE OF SURFACE-ACTIVE AGENT, SUBSEQUENTLY INJECTING INTO SAID FORMATION THROUGH SAID FIRST WELL ANOTHER BATCH OF WATER CONTAINING FROM ABOUT 0.01 TO 1 PERCENT BY WEIGHT OF A SECOND TYPE OF SURFACE-ACTIVE AGENT, AND WITHDRAWING FROM SAID FORMATION THROUGH A SECOND WELL AN INCREASED VOLUME OF OIL SAID TYPES OF SURFACE-ACTIVE AGENTS BEING SELECTED FROM THE GROUP CONSISTING OF CATIONIC, ANIONIC, WATER-SOLUBLE NON-IONIC AND OIL SOLUBLE NON-IONIC, WHEREIN SAID AGENTS CONTAIN AN OIL SOLUBLE PORTION HAVING AT LEAST ABOUT 12 CARBON ATOMS AND A WATER-SOLUBLE PORTION SELECTED FROM THE GROUP CONSISTING OF CATIONIC, ANIONIC, AND NON-IONIC RADICALS.
Claim 2
Dependent Claim
134 words
AN IMPROVED WATER DRIVE PROCESS FOR RECOVERING THE OIL FORM OIL-BEARING FORMATIONS COMPRISING INJECTING INTO THE FORMATION THROUGH A FIRST WELL A BATCH OF WATER CONTAINING FROM ABOUT 0.01 TO 1 PERCENT BY WEIGHT OF A FIRST TYPE OF SURFACE-ACTIVE AGENT, SUBSEQUENTLY INJECTING INTO SAID FORMATION THROUGH SAID FIRST WELL ANOTHER BATCH OF WATER CONTAINING FROM ABOUT 0.01 TO 1 PERCENT BY WEIGHT OF A SECOND TYPE OF SURFACE-ACTIVE AGENT, AND WITHDRAWING FROM SAID FORMATION THROUGH A SECOND WELL AN INCREASED VOLUME OF OIL SAID TYPES OF SURFACE-ACTIVE AGENTS BEING SELECTED FROM THE GROUP CONSISTING OF CATIONIC, ANIONIC, WATER-SOLUBLE NON-IONIC AND OIL SOLUBLE NON-IONIC, WHEREIN SAID AGENTS CONTAIN AN OIL SOLUBLE PORTION HAVING AT LEAST ABOUT 12 CARBON ATOMS AND A WATER-SOLUBLE PORTION SELECTED FROM THE GROUP CONSISTING OF CATIONIC, ANIONIC, AND NON-IONIC RADICALS.
References Cited (Backward Citations)
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US2288857A
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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) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |