US2681889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsified acids for well treating
Assignee: Stanolind Oil and Gas Co
•
Filing: 1951-12-29
•
Granted: 1954-06-22
•
Expires: 1971-12-29
Abstract
No abstract record available.
Inventors
- 👤 Paul L Menaul
- 👤 Jr Harold W Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:48
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72; Y; Y10; Y10S; Y10S507/00; Y10S507/921; Y10S507/933
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
AN ACID-IN-OIL EMULSION SUITABLE FOR WELL ACIDIZING STABILIZED BY AN OIL-SOLUBLE, NON-IONIC, SURFACE-ACTIVE AGENT HAVING AN ESTER LINKAGE HYDROLYZABLE BY THE ACTION OF THE ACID TO BREAK THE EMULSION.
Claim 2
Dependent Claim
29 words
AN ACID-IN-OIL EMULSION SUITABLE FOR WELL ACIDIZING STABILIZED BY AN OIL-SOLUBLE, NON-IONIC, SURFACE-ACTIVE AGENT HAVING AN ESTER LINKAGE HYDROLYZABLE BY THE ACTION OF THE ACID TO BREAK THE EMULSION.
References Cited (Backward Citations)
US1922154A
Cited
US2050933A
Cited
US2050932A
Cited
US2175079A
Cited
US2356254A
Cited
US2356205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |