US2914309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil and gas recovery from tar sands
Assignee: Svenska Skifferolje AB
•
Filing: 1953-05-25
•
Granted: 1959-11-24
•
Expires: 1973-05-25
Abstract
No abstract record available.
Inventors
- 👤 Salomonsson Gosta Joha Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:03
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; Y; Y10; Y10S; Y10S48/00; Y10S48/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
IN A METHOD OF RECOVERING HYDROCARBON CONTAINING PRODUCTS FROM TAR SANDS IN SITU IN THE EARTH, THE STEP CONSISING ESSENTIALLY OF SUBJECTING SAID TAR SAND IN SITU IN A VERTICAL DRILL HOLE TO HEAT PROGRESSIVELY VERTICALLY AND COLUMNARLY ALONG THE WALLS OF THE BOREHOLE AT A TEMPERATURE OF FROM ABOUT 250*C. TO ABOUT 400*C. TO PYROLYZE THE TAR BY CRACKING TO PRODUCE VOLATILE LIGHTER HYDROCARBONS AND COKE THEREBY TO FORM A TUBE WALL OF HARD SAND
Claim 2
Dependent Claim
76 words
IN A METHOD OF RECOVERING HYDROCARBON CONTAINING PRODUCTS FROM TAR SANDS IN SITU IN THE EARTH, THE STEP CONSISING ESSENTIALLY OF SUBJECTING SAID TAR SAND IN SITU IN A VERTICAL DRILL HOLE TO HEAT PROGRESSIVELY VERTICALLY AND COLUMNARLY ALONG THE WALLS OF THE BOREHOLE AT A TEMPERATURE OF FROM ABOUT 250*C. TO ABOUT 400*C. TO PYROLYZE THE TAR BY CRACKING TO PRODUCE VOLATILE LIGHTER HYDROCARBONS AND COKE THEREBY TO FORM A TUBE WALL OF HARD SAND
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |