Patent US3329610A successfully refreshed from Google Patents.
US3329610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bactericides for use in secondary oil recovery
Assignee: FMC Corp
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Filing: 1965-11-16
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Granted: 1967-07-04
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Expires: 1985-11-16
Abstract
No abstract record available.
Inventors
- 👤 Donald F Kreuz
- 👤 Jr William H Kibbl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:40
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/605; C09K8/62; C09K8/72; C09K8/74; Y; Y10; Y10S; Y10S507/00; Y10S507/92
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN THE PROCESS OF SECONDARY OIL RECOVERY WHEREIN WATER IS INJECTED INTO A WATER INJECTION WELL UNDER HIGH PRESSURES AND WHEREIN OIL IS DISPLACED BY SAID WATER FROM THE PORES OF UNDERGROUP EARTH FORMATIONS AND RECOVERED FROM A SECOND WELL SOME DISTANCE REMOVED FROM THE SITE OF SAID WATER INJECTION WELL, THE IMPROVEMENT WHICH COMPRISES MAINTAINING PERACETIC ACID AS A BACTERICIDE IN SAID WATER IN CONCENTRATION OF AT LEAST 2.8 P.P.M. WHEN BACTERIA IN SAID WATER HAVE NOT BEEN PREVIOUSLY CONDITIONED TO PERACETIC ACID, AND IN CONCENTRATIONS OF AT LEAST 4.0 P.P.M. WHEN BACTERIA IN SAID WATER HAVE BEEN CONDITIONED TO PERACETIC ACID, PRIOR TO USING SAID WATER TO DISPLACE SAID OIL FROM SAID UNDERGROUND EARTH FORMATIONS.
Claim 2
Dependent Claim
117 words
IN THE PROCESS OF SECONDARY OIL RECOVERY WHEREIN WATER IS INJECTED INTO A WATER INJECTION WELL UNDER HIGH PRESSURES AND WHEREIN OIL IS DISPLACED BY SAID WATER FROM THE PORES OF UNDERGROUP EARTH FORMATIONS AND RECOVERED FROM A SECOND WELL SOME DISTANCE REMOVED FROM THE SITE OF SAID WATER INJECTION WELL, THE IMPROVEMENT WHICH COMPRISES MAINTAINING PERACETIC ACID AS A BACTERICIDE IN SAID WATER IN CONCENTRATION OF AT LEAST 2.8 P.P.M. WHEN BACTERIA IN SAID WATER HAVE NOT BEEN PREVIOUSLY CONDITIONED TO PERACETIC ACID, AND IN CONCENTRATIONS OF AT LEAST 4.0 P.P.M. WHEN BACTERIA IN SAID WATER HAVE BEEN CONDITIONED TO PERACETIC ACID, PRIOR TO USING SAID WATER TO DISPLACE SAID OIL FROM SAID UNDERGROUND EARTH FORMATIONS.
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) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |