US2957823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for acidizing wells and composition therefor
Assignee: Cities Service Research and Development Co
•
Filing: 1957-02-06
•
Granted: 1960-10-25
•
Expires: 1977-02-06
Abstract
No abstract record available.
Inventors
- 👤 Newcombe Jack
- 👤 Wayne S Fallgatter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:42
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/04; C07; C07D; C07D233/00; C07D233/04; C07D233/06; C07D233/08; C07D233/12; C07D233/16; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72; C09K8/74; Y; Y10; Y10S; Y10S507/00; Y10S507/933; Y10S507/934; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A WELL TREATING COMPOSITION COMPRISING AN AQUEOUS SOLUTION CONTAINING FROM 1 TO ABOUT 25% HCL FROM 0.01 TO 2% OF AN ACID SOLUBLE IMIDAZOLINE, EXCEPT THE IMIDAZOLINE PREPARED BY REACTING DIETHYLENE TRIAMINE AND STEARIC ACID, HAVING A MOLECULAR WEIGHT FROM 70 TO 550 AND FROM 0.5 TO 25% OF AN ALIPHATIC MONOCARBOXYLIC ACID HAVING FROM 1 TO 5 CARBON ATOMS.
Claim 2
Dependent Claim
60 words
A WELL TREATING COMPOSITION COMPRISING AN AQUEOUS SOLUTION CONTAINING FROM 1 TO ABOUT 25% HCL FROM 0.01 TO 2% OF AN ACID SOLUBLE IMIDAZOLINE, EXCEPT THE IMIDAZOLINE PREPARED BY REACTING DIETHYLENE TRIAMINE AND STEARIC ACID, HAVING A MOLECULAR WEIGHT FROM 70 TO 550 AND FROM 0.5 TO 25% OF AN ALIPHATIC MONOCARBOXYLIC ACID HAVING FROM 1 TO 5 CARBON ATOMS.
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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) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |