US3119447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of flood waters
Assignee: Shell USA Inc
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Filing: 1960-07-27
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Granted: 1964-01-28
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Expires: 1980-07-27
Abstract
No abstract record available.
Inventors
- 👤 Philip J Raifsnider
- 👤 Lavigne K Gatzke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:18
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C23; C23F; C23F11/00; C23F11/08; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN THE METHOD FOR THE SECONDARY OIL RECOVERY WHEREIN FLOODING WATER IS INJECTED THROUGH FERRUGINOUS PIPES INTO AN OIL-BEARING FORMATION TO DISPLACE A PORTION OF THE RESIDUAL OIL THEREIN TOWARD A PRODUCING WELL, THE IMPROVEMENT COMPRISING HAVING PRESENT IN SAID INJECTED FLOODING WATER, TO PREVENT CORROSION OF SAID FERRUGINOUS PIPES, BETWEEN ABOUT 10 AND 100 P.P.M., BASED ON THE FLOODING WATER, OF A BASIC ORGANIC NITROGEN COMPOUND HAVING AT LEAST ONE ALIPHATIC GROUP OF AT LEAST 6 CARBON ATOMS IN CHAIN LENGTH, AND BETWEEN ABOUT 10 P.P.M. AND ABOUT 150 P.P.M., OF SULFITE ION, WHEN CALCULATED AS SODIUM SULFITE BASED ON THE FLOODING WATER.
Claim 2
Dependent Claim
104 words
IN THE METHOD FOR THE SECONDARY OIL RECOVERY WHEREIN FLOODING WATER IS INJECTED THROUGH FERRUGINOUS PIPES INTO AN OIL-BEARING FORMATION TO DISPLACE A PORTION OF THE RESIDUAL OIL THEREIN TOWARD A PRODUCING WELL, THE IMPROVEMENT COMPRISING HAVING PRESENT IN SAID INJECTED FLOODING WATER, TO PREVENT CORROSION OF SAID FERRUGINOUS PIPES, BETWEEN ABOUT 10 AND 100 P.P.M., BASED ON THE FLOODING WATER, OF A BASIC ORGANIC NITROGEN COMPOUND HAVING AT LEAST ONE ALIPHATIC GROUP OF AT LEAST 6 CARBON ATOMS IN CHAIN LENGTH, AND BETWEEN ABOUT 10 P.P.M. AND ABOUT 150 P.P.M., OF SULFITE ION, WHEN CALCULATED AS SODIUM SULFITE BASED ON THE FLOODING WATER.
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) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |