US3681240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retarded acid emulsion
Assignee: BP America Production Co
•
Filing: 1970-12-10
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Granted: 1972-08-01
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Expires: 1990-12-10
Abstract
Abstract THE ACTION OF ACID EMULSIONS FOR UE INACIDIZING HYDROCARBON-BEARING FORMATIONS IS PROLONGED BY EMPLOYING AS THE PRINCIPAL EMULSIFYING AGENT AN AMINE SALT OF DODECYLBENZENE SULFONIC ACID. ACID EMULSIONS EMPLOYING THE AMINE SALT OF DODECYLBENZENE SULFONIC ACID EXHIBIT GREATER STABILITY THAN THOSE EMPLOYING THE FREE ACID.
Inventors
- 👤 Clarence R Fast
- 👤 Frederick H Rixe
- 👤 Ernest L Duffield Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:32
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72; Y; Y10; Y10S; Y10S507/00; Y10S507/902; Y10S507/933
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |