US3250327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovering nonflowing hydrocarbons
Assignee: ExxonMobil Oil Corp
•
Filing: 1963-04-02
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Granted: 1966-05-10
•
Expires: 1983-04-02
Abstract
No abstract record available.
Inventors
- 👤 Fretwell G Crider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:22
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243; E21B43/247
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
74 words
A METHOD FOR RELEASING HYDROCARBONS FROM AN EARTH FORMATION BY IN SITU HEATING COMPRISING THE STEPS OF: (A) PROVIDING A PLURALITY OF SPACED VERTICAL BOREHOLES IN THE EARTH, EACH OF SAID BOREHOLES IN FLUID COMMUNICATION WITH A FORMATION CONTAINING HEAT-RELEASABLE HYDROCARBONS, (B) PROVIDING A CHANNEL CONTAINING A PERMEABLE REFRACTORY MATERIAL IN THE HYDROCARBON-CONTAINING FORMATION, WHICH CHANNEL FLUIDLY INTERCONNECTS AT LEAST TWO OF SAID BOREHOLES, (C) ESTABLISHING A SUBSTANTIALLY STATIONARY BURNING ZONE IN THE CHANNEL,
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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) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |