US2747672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heating subterranean formations
Assignee: California Research LLC
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Filing: 1953-09-11
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Granted: 1956-05-29
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Expires: 1973-09-11
Abstract
No abstract record available.
Inventors
- 👤 Clarke N Simm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:22
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
THE METHOD OF HEATING A SUBTERRANEAN FORMATION PENETRATED BY A WELL BORE COMPRISING THE STEPS OF INTRODUCING INTO SAID WELL BORE A DISPERSION OF PHOSPHORUS IN A SUBSTANCE TO WHICH SAID PHOSPHORUS IS INERT, APPLYING PRESSURE TO SAID DISPERSION TO IMPREGNATE THE WALL OF SAID WELL BORE WITH SAID PHOSPHORUS, AND INTRODUCING INTO SAID WELL BORE IN CONTACT WITH SAID PHOSPHORUS AN OXYGEN-CONTAINING GAS CAPABLE OF INITIATING EXOTHERMIC REACTION WITH SAID PHOSPHORUS.
Claim 2
Independent Claim
72 words
THE METHOD OF HEATING A SUBTERRANEAN FORMATION PENETRATED BY A WELL BORE COMPRISING THE STEPS OF INTRODUCING INTO SAID WELL BORE A DISPERSION OF PHOSPHORUS IN A SUBSTANCE TO WHICH SAID PHOSPHORUS IS INERT, APPLYING PRESSURE TO SAID DISPERSION TO IMPREGNATE THE WALL OF SAID WELL BORE WITH SAID PHOSPHORUS, AND INTRODUCING INTO SAID WELL BORE IN CONTACT WITH SAID PHOSPHORUS AN OXYGEN-CONTAINING GAS CAPABLE OF INITIATING EXOTHERMIC REACTION WITH SAID PHOSPHORUS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |