US2875831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dissemination of wetting agents in subterranean hydrocarbon-bearing formations
Assignee: Oil Recovery Corp
•
Filing: 1951-04-16
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Granted: 1959-03-03
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Expires: 1971-04-16
Abstract
No abstract record available.
Inventors
- 👤 James W Martin
- 👤 Frederick A Hessel
- 👤 Irving P Hammer
- 👤 John B Rust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:05
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/164; C; C09; C09K; C09K8/00; C09K8/58; C09K8/594
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A METHOD OF TREATING A SUBTERRANEAN HYDROCARBON BEARING FORMATION WHICH COMPRISES DISSEMINATING A NONIONIC SURFACE ACTIVE AGENT WITHIN SAID FORMATION THROUGH AN EXTENDED AREA THEREOF BY CO2 CARBONATED WATER AT A
Claim 2
Independent Claim
31 words
A METHOD OF TREATING A SUBTERRANEAN HYDROCARBON BEARING FORMATION WHICH COMPRISES DISSEMINATING A NONIONIC SURFACE ACTIVE AGENT WITHIN SAID FORMATION THROUGH AN EXTENDED AREA THEREOF BY CO2 CARBONATED WATER AT A
References Cited (Backward Citations)
US1658305A
Cited
US656466A
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US1263618A
Cited
US1511067A
Cited
US1843002A
Cited
US1826371A
Cited
US2233381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |