US2804146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of petroleum oil from partially depleted subterranean reservoirs
Assignee: Individual
•
Filing: 1955-04-20
•
Granted: 1957-08-27
•
Expires: 1975-04-20
Abstract
No abstract record available.
Inventors
- 👤 Paul B Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:28
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN A PROCESS FOR THE RECOVERY OF PETROLEUM OIL FROM A PARTIALLY DEPLETED SUBTERRANEAN PETROLEUM OIL RESERVOIR WHEREIN AN OXIDATION GAS IS PASSED TO SAID RESERVOIR THROUGH AN INPUT WELL AND COMBUSTION OF A PORTION OF THE PETROLEUM OIL IS MAINTAINED WITHIN SAID RESERVOIR FOR THE PURPOSE OF WITHDRAWING PETROLEUM PRODUCTS AND COMBUSTION PRODUCTS FROM SAID RESERVOIR THROUGH AN OUTPUT WELL, THE IMPROVEMENT COMPRISING ADDING TO SAID OXIDIZING GAS PASSED TO SAID RESERVOIR A CHLORINE-CONTAINING CATALYST TO INCREASE THE RATIO OF CARBON MONOXIDE TO CARBON DIOXIDE IN THE GAS PRODUCED BY COMBUSTION.
Claim 2
Dependent Claim
92 words
IN A PROCESS FOR THE RECOVERY OF PETROLEUM OIL FROM A PARTIALLY DEPLETED SUBTERRANEAN PETROLEUM OIL RESERVOIR WHEREIN AN OXIDATION GAS IS PASSED TO SAID RESERVOIR THROUGH AN INPUT WELL AND COMBUSTION OF A PORTION OF THE PETROLEUM OIL IS MAINTAINED WITHIN SAID RESERVOIR FOR THE PURPOSE OF WITHDRAWING PETROLEUM PRODUCTS AND COMBUSTION PRODUCTS FROM SAID RESERVOIR THROUGH AN OUTPUT WELL, THE IMPROVEMENT COMPRISING ADDING TO SAID OXIDIZING GAS PASSED TO SAID RESERVOIR A CHLORINE-CONTAINING CATALYST TO INCREASE THE RATIO OF CARBON MONOXIDE TO CARBON DIOXIDE IN THE GAS PRODUCED BY COMBUSTION.
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) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |