Patent US2912378A successfully refreshed from Google Patents.
US2912378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating oil well flooding waters to reduce sulfate-reducing bacteria concentration
Assignee: Pure Oil Co
•
Filing: 1956-06-19
•
Granted: 1959-11-10
•
Expires: 1976-06-19
Abstract
No abstract record available.
Inventors
- 👤 George G Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:43
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5236; C09; C09K; C09K8/00; C09K8/60; C09K8/605
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
THE METHOD OF TREATING TURBID, SULFATE-CONTAINING WATER FOR USE IN SECONDARY OIL RECOVERY, FLOODING OPERATIONS TO SUBSTANTIALLY REDUCE THE SULFATE-REDUCING BACTERIAL CONCENTRATION THEREOF, SAID WATER HAVING A TURBIDITY OF ABOVE ABOUT 1000 P.P.M. AND CONTAINING ABOUT 960 P.P.M. OF SULFATE ION WHICH COMPRISES ADDING TO SAID WATER AN AMOUNT OF A MIXTURE CONSISTING OF A WATER SOLUBLE METAL SALT SELECTED FROM THE GROUP CONSISTING OF BARIUM CHLORIDE, BARIUM ACETATE, LEAD CHLORIDE AND LEAD ACETATE, AND A CLARIFYING AGENT CONSISTING OF LIMEAND ALUM TO INCORPORATE IN THE WATER ABOUT 2200 P.P.M. OF SAID WATER SOLUBLE METAL SALT, ABOUT 100 P.P.M OF LIME AND 50 P.P.M. OF ALUM AND SEPARATING THE WATER INSOLUBLE SULFATE SALT AND CLARIFYING AGENT FROM THE WATER.
Claim 2
Independent Claim
119 words
THE METHOD OF TREATING TURBID, SULFATE-CONTAINING WATER FOR USE IN SECONDARY OIL RECOVERY, FLOODING OPERATIONS TO SUBSTANTIALLY REDUCE THE SULFATE-REDUCING BACTERIAL CONCENTRATION THEREOF, SAID WATER HAVING A TURBIDITY OF ABOVE ABOUT 1000 P.P.M. AND CONTAINING ABOUT 960 P.P.M. OF SULFATE ION WHICH COMPRISES ADDING TO SAID WATER AN AMOUNT OF A MIXTURE CONSISTING OF A WATER SOLUBLE METAL SALT SELECTED FROM THE GROUP CONSISTING OF BARIUM CHLORIDE, BARIUM ACETATE, LEAD CHLORIDE AND LEAD ACETATE, AND A CLARIFYING AGENT CONSISTING OF LIMEAND ALUM TO INCORPORATE IN THE WATER ABOUT 2200 P.P.M. OF SAID WATER SOLUBLE METAL SALT, ABOUT 100 P.P.M OF LIME AND 50 P.P.M. OF ALUM AND SEPARATING THE WATER INSOLUBLE SULFATE SALT AND CLARIFYING AGENT FROM THE WATER.
References Cited (Backward Citations)
US713800A
Cited
US1547111A
Cited
US2025715A
Cited
CH186278A
Cited
US2117631A
Cited
US2234285A
Cited
US2300693A
Cited
US2360812A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |