Patent US2911206A successfully refreshed from Google Patents.
US2911206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
In situ retorting of oil shale
Assignee: Phillips Petroleum Co
•
Filing: 1957-03-08
•
Granted: 1959-11-03
•
Expires: 1977-03-08
Abstract
No abstract record available.
Inventors
- 👤 Purre Heino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:16
CPC Classifications
E; E21; E21C; E21C41/00; E21C41/16; E21C41/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS OF RECOVERY OF HYDROCARBONS FROM AN IMPERMEABLE UNDERGROWN STRATUM CONTAINING SAME LYING ADJACENT A PERMEABLE STRATUM WHICH COMPRISES FORMING A TUNNEL IN THESE STRATA PARALLEL THERWITH AND AT THE SAME LEVEL EXTENDING ALONG A SUBSTANTIAL SECTION OF THE STRATA: FORMING AT LEAST ONE BOREHOLE THRU SAID STRATA SPACED FROM SAID TUNNEL; HEATING AND PRODUCING HYDROCARBONS FROM SAID IMPERMEABLE STRATUM BY INTRODUCING HOT GAS TO SAID TUNNEL AND FORCING SAME THRU THE PORES IN
Claim 2
Dependent Claim
75 words
A PROCESS OF RECOVERY OF HYDROCARBONS FROM AN IMPERMEABLE UNDERGROWN STRATUM CONTAINING SAME LYING ADJACENT A PERMEABLE STRATUM WHICH COMPRISES FORMING A TUNNEL IN THESE STRATA PARALLEL THERWITH AND AT THE SAME LEVEL EXTENDING ALONG A SUBSTANTIAL SECTION OF THE STRATA: FORMING AT LEAST ONE BOREHOLE THRU SAID STRATA SPACED FROM SAID TUNNEL; HEATING AND PRODUCING HYDROCARBONS FROM SAID IMPERMEABLE STRATUM BY INTRODUCING HOT GAS TO SAID TUNNEL AND FORCING SAME THRU THE PORES IN
References Cited (Backward Citations)
US1842098A
Cited
US1870869A
Cited
US2390770A
Cited
US2584606A
Cited
US2670047A
Cited
US2642943A
Cited
US2718263A
Cited
US2780449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-02 | 1963-05-04 | 1963-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-02 | 1967-05-04 | 1967-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-02 | 1971-05-04 | 1971-11-03 | $7700.00 | Window Closed / Lapsed |