Patent US5467072A successfully refreshed from Google Patents.
US3305016A
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Displacement of oil from partially depleted reservoirs
Assignee: ExxonMobil Upstream Research Co
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Filing: 1959-11-02
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Granted: 1967-02-21
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Expires: 1979-11-02
Abstract
No abstract record available.
Inventors
- 👤 Gordon P Lindblom
- 👤 Gerald D Ortloff
- 👤 John T Patton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:42
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86; C09K8/88; C09K8/90; C09K8/905; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
IN A PROCESS WHEREIN AN AQUEOUS MEDIUM IS INJECTED INTO A WELL AND CIRCULATED IN CONTACT WITH A SUBSURFCE FORMATION, THE IMPROVEMENT WHICH COMPRISES INCORPORATING INTO SAID MEDIUM A HETEROPOLYSACCHARIDE PRODUCED BY THE ACTION OF BACTERIA OF THE GENUS XANTHOMONAS ON A CARBOHYDRATE AND THEREAFTER INJECTING SAID MEDIUM INTO SAID WELL.
Claim 2
Dependent Claim
51 words
IN A PROCESS WHEREIN AN AQUEOUS MEDIUM IS INJECTED INTO A WELL AND CIRCULATED IN CONTACT WITH A SUBSURFCE FORMATION, THE IMPROVEMENT WHICH COMPRISES INCORPORATING INTO SAID MEDIUM A HETEROPOLYSACCHARIDE PRODUCED BY THE ACTION OF BACTERIA OF THE GENUS XANTHOMONAS ON A CARBOHYDRATE AND THEREAFTER INJECTING SAID MEDIUM INTO 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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |