US2867277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hydrocarbon material
Assignee: University of Kansas Center for Research Inc (KUCR)
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Filing: 1956-02-14
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Granted: 1959-01-06
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Expires: 1976-02-14
Abstract
No abstract record available.
Inventors
- 👤 Charles F Weinaug
- 👤 Ling Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:17
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
IN A METHOD OF RECOVERING PETROLEUM FROM AN UNDERGROUND FORMATION THE STEPS COMPRISING DISPLACING THE PETROLEUM FROM THE FORMATION TO AND RECOVERING IT FROM A PRODUCTION WELL BY INJECTING INTO THE FORMATION AT LEAST ONE PREMIXED FLUID MIXTURE OF PETROLEUM AND A HYDROCARBON FLUID, SAID MIXTURE BEING OF VISCOSITY INTERMEDIATE OF SAID PETROLEUM AND SAID HYDROCARBON FLUID, AND THEN INJECTING A HYDROCARBON DISPLACEMENT FLUID, SAID MIXTURE SUPPLYING A TRANSITION ZONE BETWEEN THE PETROLEUM AND SAID FLUID.
Claim 2
Dependent Claim
76 words
IN A METHOD OF RECOVERING PETROLEUM FROM AN UNDERGROUND FORMATION THE STEPS COMPRISING DISPLACING THE PETROLEUM FROM THE FORMATION TO AND RECOVERING IT FROM A PRODUCTION WELL BY INJECTING INTO THE FORMATION AT LEAST ONE PREMIXED FLUID MIXTURE OF PETROLEUM AND A HYDROCARBON FLUID, SAID MIXTURE BEING OF VISCOSITY INTERMEDIATE OF SAID PETROLEUM AND SAID HYDROCARBON FLUID, AND THEN INJECTING A HYDROCARBON DISPLACEMENT FLUID, SAID MIXTURE SUPPLYING A TRANSITION ZONE BETWEEN THE PETROLEUM AND SAID FLUID.
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) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |