US2976236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the control of bacteria in water flooding operations
Assignee: Commercial Solvents Corp
•
Filing: 1958-10-03
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Granted: 1961-03-21
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Expires: 1978-10-03
Abstract
No abstract record available.
Inventors
- 👤 Edward O Bennett
- 👤 Edward B Hodge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:57
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/605; Y; Y10; Y10S; Y10S507/00; Y10S507/92; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
IN THE PROCESS OF SECONDARY OIL RECOVERY CHARACTERIZED BY THE STEP OF INJECTING FLOODING WATER INTO OIL BEARING SUBTERRANEANN FORMATIONS TO DISPLACE PORTIONS OF THE RESIDUAL OIL THEREIN, THE IMRPOVEMENT COMPRISING HAVING PRESENT IN SAID INJECTED FLOODING WATER IN EXCESS OF 2-5 P.P.M. OF A NITROESTER HAVING THE FOLLOWING STRUCTURAL FORMULA:
Claim 2
Dependent Claim
51 words
IN THE PROCESS OF SECONDARY OIL RECOVERY CHARACTERIZED BY THE STEP OF INJECTING FLOODING WATER INTO OIL BEARING SUBTERRANEANN FORMATIONS TO DISPLACE PORTIONS OF THE RESIDUAL OIL THEREIN, THE IMRPOVEMENT COMPRISING HAVING PRESENT IN SAID INJECTED FLOODING WATER IN EXCESS OF 2-5 P.P.M. OF A NITROESTER HAVING THE FOLLOWING STRUCTURAL FORMULA:
References Cited (Backward Citations)
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US2427821A
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US2488650A
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US2692231A
Cited
US2651590A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |