US3072189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for in situ combustion
Assignee: Phillips Petroleum Co
•
Filing: 1958-05-12
•
Granted: 1963-01-08
•
Expires: 1978-05-12
Abstract
No abstract record available.
Inventors
- 👤 Macsporran Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:52
CPC Classifications
E; E21; E21B; E21B36/00; E21B36/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
44 words
A PROCESS FOR IGNITING CARBONACEOUS MATERIAL IN A; STRATUM AROUND A WELL BORE THERETHROUGH WHICH COMPRISES INJECTING FUEL GAS DOWNWARDLY ALONG THE BARE WALL OF AN ELONGATED SECTION OF SAID BOREHOLE IN CONTACT WITH SAID STRATUM FROM AN UPPER TO A LOWER LEVEL THEREOF;
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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) | 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 |