US2779418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of increasing production from wells
Assignee: Stanolind Oil and Gas Co
•
Filing: 1954-05-10
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Granted: 1957-01-29
•
Expires: 1974-05-10
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Garst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:31
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A METHOD FOR TREATING AN OIL-BEARING FORMATION PENETRATED BY A WELL COMPRISING INJECTING INTO THE WELL AND THEN INTO SAID FORMATION A SOLUTION CONTAINING A MIXTURE OF ESTERS FORMED BY REACTION OF OXYETHYLATED SORBITOL AND FATTY ACIDS, SAID ESTERS CONTAINING FROM ABOUT 2 TO 4 FATTY ACID MOLECULES PER ,OLECLUE OF OXYETHYLATED SORBITOL, SAID FATTY ACIDS CONTAINING AT LEAST ABOUT 12 CARBON ATOMS PER MOLECULE,AND SAID OXYETHYLATED SORBITOL CONTAINING FROM ABOUT 1TO 10 MOLES OF ETHYLENE OXIDE PER MOLE OF SORBITOL.
Claim 2
Independent Claim
81 words
A METHOD FOR TREATING AN OIL-BEARING FORMATION PENETRATED BY A WELL COMPRISING INJECTING INTO THE WELL AND THEN INTO SAID FORMATION A SOLUTION CONTAINING A MIXTURE OF ESTERS FORMED BY REACTION OF OXYETHYLATED SORBITOL AND FATTY ACIDS, SAID ESTERS CONTAINING FROM ABOUT 2 TO 4 FATTY ACID MOLECULES PER ,OLECLUE OF OXYETHYLATED SORBITOL, SAID FATTY ACIDS CONTAINING AT LEAST ABOUT 12 CARBON ATOMS PER MOLECULE,AND SAID OXYETHYLATED SORBITOL CONTAINING FROM ABOUT 1TO 10 MOLES OF ETHYLENE OXIDE PER MOLE OF SORBITOL.
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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) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |