Patent US3206398A successfully refreshed from Google Patents.
US3206398A
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Methods and compositions for improving secondary recovery of oil
Assignee: Sunoco Inc
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Filing: 1962-01-15
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Granted: 1965-09-14
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Expires: 1982-01-15
Abstract
No abstract record available.
Inventors
- 👤 Marlowe Bernard
- 👤 Richard L Raymond
- 👤 Jr John D Douros
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:03
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 CONTACTING FLOODING WATER WITH OIL BEARING SUBTERRANEAN FORMATIONS TO DISPLACE PORTIONS OF THE RESIDUAL OIL THEREIN, THE IMPROVEMENT COMPRISING FLOODING THE SUBTERRANEAN FORMATIONS WITH WATER HAVING INCORPORATED THEREIN A MICROORGANIXM GROWTH-INHIBITING AMOUNT OF A DI-SUBSTITUTED NAPHTHALENE OF THE STRUCTURE:
Claim 2
Dependent Claim
51 words
IN THE PROCESS OF SECONDARY OIL RECOVERY CHARACTERIZED BY THE STEP OF CONTACTING FLOODING WATER WITH OIL BEARING SUBTERRANEAN FORMATIONS TO DISPLACE PORTIONS OF THE RESIDUAL OIL THEREIN, THE IMPROVEMENT COMPRISING FLOODING THE SUBTERRANEAN FORMATIONS WITH WATER HAVING INCORPORATED THEREIN A MICROORGANIXM GROWTH-INHIBITING AMOUNT OF A DI-SUBSTITUTED NAPHTHALENE OF THE STRUCTURE:
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) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |