US2679294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Increasing production of oil wells
Assignee: Pure Oil Co
•
Filing: 1952-02-26
•
Granted: 1954-05-25
•
Expires: 1972-02-26
Abstract
No abstract record available.
Inventors
- 👤 Donald C Bond
- 👤 George G Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:52
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/845; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/933
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A METHOD OF INCREASING THE PERMEABILITY OF SILICEOUS EARTH FORMATIONS, COMPRISING PASSING INTO THE FORMATION A SODIUM HYDROXIDE SOLUTION AT A TEMPERATURE OF 350* TO 600* F., FORCING THE SOLUTION INTO THE EARTH FORMATION, THEREBY DISSOLVING SUBSTANTIAL AMOUNTS OF MATERIAL SOLUBLE THEREIN, AND FLUSHING THE FORMATION TO REMOVE THE SODIUM HYDROXIDE SOLUTION.
Claim 2
Independent Claim
52 words
A METHOD OF INCREASING THE PERMEABILITY OF SILICEOUS EARTH FORMATIONS, COMPRISING PASSING INTO THE FORMATION A SODIUM HYDROXIDE SOLUTION AT A TEMPERATURE OF 350* TO 600* F., FORCING THE SOLUTION INTO THE EARTH FORMATION, THEREBY DISSOLVING SUBSTANTIAL AMOUNTS OF MATERIAL SOLUBLE THEREIN, AND FLUSHING THE FORMATION TO REMOVE THE SODIUM HYDROXIDE SOLUTION.
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) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |