US2689230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acidizing wells
Assignee: Dow Chemical Co
•
Filing: 1952-02-18
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Granted: 1954-09-14
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Expires: 1972-02-18
Abstract
No abstract record available.
Inventors
- 👤 Paul H Cardwell
- 👤 Louis H Eilers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:11
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72; C09K8/74; C09K8/78; Y; Y10; Y10S; Y10S507/00; Y10S507/933
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
I N A METHOD OF ACIDIZING AN EARTH FORMATION HAVING A FRACTURES THERIN PENETRATED BY THE BORE OF A WELL THE STEP WHICH CONSISTS IN INJECTING INTO THE EARTH FORMATION THROUGH THE BORE OF THE WELL AN AQUEOUS SOLUTION CONTAINING FROM 2 TO 25 PER CENT OF HCL AND FROM 0.01 TO 0.5 PER CENT OF A WATER SOLUBLE CELLULOSE ETHER.
Claim 2
Dependent Claim
61 words
I N A METHOD OF ACIDIZING AN EARTH FORMATION HAVING A FRACTURES THERIN PENETRATED BY THE BORE OF A WELL THE STEP WHICH CONSISTS IN INJECTING INTO THE EARTH FORMATION THROUGH THE BORE OF THE WELL AN AQUEOUS SOLUTION CONTAINING FROM 2 TO 25 PER CENT OF HCL AND FROM 0.01 TO 0.5 PER CENT OF A WATER SOLUBLE CELLULOSE ETHER.
References Cited (Backward Citations)
US2596137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |