US2802784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water flooding of subterranean formations
Assignee: Union Oil Company of California
•
Filing: 1954-08-30
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Granted: 1957-08-13
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Expires: 1974-08-30
Abstract
No abstract record available.
Inventors
- 👤 Theodore J Nowak
- 👤 Jr Howard F Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:26
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
IN A PORCESS WHEREIN AN AQUEOUS FLOODING MEDIUM IS INJECTED INTO A SUBTERRANEAN OIL-BEARING FORMATION AND IS FORCED THERETHROUGH TOWARDS AN OUTPUT WELL, THE IMPROVEMENT WHICH CONSISTS IN EMPLOYING A FLOODING MEDIUM CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF AN ACID SALT OF A COMPOUND HAVING TH GENERAL FORMULA:
Claim 2
Dependent Claim
49 words
IN A PORCESS WHEREIN AN AQUEOUS FLOODING MEDIUM IS INJECTED INTO A SUBTERRANEAN OIL-BEARING FORMATION AND IS FORCED THERETHROUGH TOWARDS AN OUTPUT WELL, THE IMPROVEMENT WHICH CONSISTS IN EMPLOYING A FLOODING MEDIUM CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF AN ACID SALT OF A COMPOUND HAVING TH GENERAL FORMULA:
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) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |