US2894907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acidizing wells
Assignee: Cities Service Research and Development Co
•
Filing: 1957-02-06
•
Granted: 1959-07-14
•
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
2026-11-05 04:01
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/04; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72; C09K8/74; Y; Y10; Y10S; Y10S507/00; Y10S507/933; Y10S507/934
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A WELL TREATING COMPOSITION COMPRISING AN AQUEOUS SOLUTION CONTAINING FROM 1 TO ABOUT 25% HCI, FROM 0.01 AND 2% OF AN ACID SOLUBLE BIS-IMIDAZOLINE HAVING A MOLECULAR WEIGHT FROM 166 TO 860 AND FROM 0.5 TO 25% OF AN ALIPHATIC MONOCARBOXYLIC ACID HAVING FRROM 1 TO 5 CAARBON ATOMS.
Claim 2
Dependent Claim
49 words
A WELL TREATING COMPOSITION COMPRISING AN AQUEOUS SOLUTION CONTAINING FROM 1 TO ABOUT 25% HCI, FROM 0.01 AND 2% OF AN ACID SOLUBLE BIS-IMIDAZOLINE HAVING A MOLECULAR WEIGHT FROM 166 TO 860 AND FROM 0.5 TO 25% OF AN ALIPHATIC MONOCARBOXYLIC ACID HAVING FRROM 1 TO 5 CAARBON ATOMS.
References Cited (Backward Citations)
US2301875A
Cited
US2292208A
Cited
US2400395A
Cited
US2468163A
Cited
US2713033A
Cited
US2761836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-13 | 1963-01-12 | 1963-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-13 | 1967-01-12 | 1967-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-13 | 1971-01-12 | 1971-07-14 | $7700.00 | Window Closed / Lapsed |