Patent US2975835A successfully refreshed from Google Patents.
US2975835A
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Bacteriological method of oil recovery
Assignee: Pure Oil Co
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Filing: 1957-11-07
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Granted: 1961-03-21
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Expires: 1977-11-07
Abstract
No abstract record available.
Inventors
- 👤 Donald C Bond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:56
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86; C09K8/88; C09K8/90; C09K8/905; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/832; Y10S435/909; Y10S435/911; Y10S435/913; Y10S435/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
THE METHOD OF INCREASING PRODUCTION OF HYDROCARBON FLUID FROM A ROCK FORMATION CONTAINING SUCH FLUID COMPRISING FORCING INTO SAID FORMATION THROUGH A WELL A FRACTURING MEDIUM, TOGETHER WITH OIL-RELEASING BACTERIAOF THE GROUP CONSISTING OG THE GENUS DESULFOVIBRIO, ASPERGILLUS FLAVUS, BACILLUS METHANICUS, AND BACILLUS ETHANICUS AND A NUTRIENT THEREOF, UNDER PRESSURE SUFFICIENT TO FRACTURE SAID FORMATION, SHUTTING IN SAID WELL FOR A PERIOD OF ABOUT 1 TO 12 MONTHS TO ENABLE SAID BACTERIA TO ACT UPON SAID HYDROCARBON FLUID, AND THEN PRODUCING SAID HYDROCARBON FLUID FROM SAID WELL.
Claim 2
Independent Claim
87 words
THE METHOD OF INCREASING PRODUCTION OF HYDROCARBON FLUID FROM A ROCK FORMATION CONTAINING SUCH FLUID COMPRISING FORCING INTO SAID FORMATION THROUGH A WELL A FRACTURING MEDIUM, TOGETHER WITH OIL-RELEASING BACTERIAOF THE GROUP CONSISTING OG THE GENUS DESULFOVIBRIO, ASPERGILLUS FLAVUS, BACILLUS METHANICUS, AND BACILLUS ETHANICUS AND A NUTRIENT THEREOF, UNDER PRESSURE SUFFICIENT TO FRACTURE SAID FORMATION, SHUTTING IN SAID WELL FOR A PERIOD OF ABOUT 1 TO 12 MONTHS TO ENABLE SAID BACTERIA TO ACT UPON SAID HYDROCARBON FLUID, AND THEN PRODUCING SAID HYDROCARBON FLUID FROM SAID WELL.
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) | 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 |