US2580765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for treating wells
Assignee: Individual
•
Filing: 1949-01-07
•
Granted: 1952-01-01
•
Expires: 1969-01-07
Abstract
No abstract record available.
Inventors
- 👤 Elwin B Hall
- 👤 Ernest F Snyder
- 👤 Jr Carl S Seybold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:21
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/52; C09K8/528; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD OF TREATING AN OIL OR GAS WELL COMPRISING WASHING SAID WELL WITH AN AQUEOUS SOLUTION CONTAINING FROM ONE AND ONE-HALF PERCENT. TO FIVE PERCENT. OF SODIUM ACID PYROPHOSPHATE, FROM ONE PERCENT. TO FIVE PERCENT. OF AN ANIONIC NON-SOAP DETERGENT, AND FROM ONE-FOURTH PERCENT TO TWO PERCENT. OF A NONIONIC DETERGENT SO AS TO DISINTEGRATE SHEATHING PRESENT IN SAID WELL, SAID AQUEOUS SOLUTION HAVING A PH OF BETWEEN 3.5 AND 4.5.
Claim 2
Independent Claim
72 words
A METHOD OF TREATING AN OIL OR GAS WELL COMPRISING WASHING SAID WELL WITH AN AQUEOUS SOLUTION CONTAINING FROM ONE AND ONE-HALF PERCENT. TO FIVE PERCENT. OF SODIUM ACID PYROPHOSPHATE, FROM ONE PERCENT. TO FIVE PERCENT. OF AN ANIONIC NON-SOAP DETERGENT, AND FROM ONE-FOURTH PERCENT TO TWO PERCENT. OF A NONIONIC DETERGENT SO AS TO DISINTEGRATE SHEATHING PRESENT IN SAID WELL, SAID AQUEOUS SOLUTION HAVING A PH OF BETWEEN 3.5 AND 4.5.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |