Patent US3072191A successfully refreshed from Google Patents.
US3072191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer petroleum recovery process
Assignee: Pure Oil Co
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Filing: 1961-04-10
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Granted: 1963-01-08
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Expires: 1981-04-10
Abstract
No abstract record available.
Inventors
- 👤 Donald C Bond
- 👤 Leo J O'brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:44
CPC Classifications
E; E21; E21B; E21B36/00; E21B36/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
IN THE RECOVERY OF OIL THROUGH A WELL-BORE PENETRATING A SUBTERRANEAN RESERVOIR, COMPRISING AN OIL PRODUCING STRATUS, A COMBUSTIBLE-GAS-PRODUCING STRATUS VERTICALLY SPACED THEREFROM, AND A SUBSTANTIALLY IMPERMEABLE STRATUM LYING BETWEEN SAID PRODUCING STRATA, WHEREIN VIS-
Claim 2
Dependent Claim
35 words
IN THE RECOVERY OF OIL THROUGH A WELL-BORE PENETRATING A SUBTERRANEAN RESERVOIR, COMPRISING AN OIL PRODUCING STRATUS, A COMBUSTIBLE-GAS-PRODUCING STRATUS VERTICALLY SPACED THEREFROM, AND A SUBSTANTIALLY IMPERMEABLE STRATUM LYING BETWEEN SAID PRODUCING STRATA, WHEREIN VIS-
References Cited (Backward Citations)
US2584605A
Cited
US2874777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |