US3580330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Geothermal system
Assignee: SOC TECHNIQUE DE GEOTHERMIE
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Filing: 1969-01-02
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Granted: 1971-05-25
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Expires: 1989-01-02
Abstract
Abstract Hot geothermal water in liquid or vapor form rises, with the aid of a pump if necessary, in an insulated well and passes through a heat exchanger where its heat is utilized for urban heating. Subsequently, the spent water is reinjected through another well into the original geothermal body of water at a point sufficiently remote from the point at which it was extracted to prevent the cooled water from substantially lowering the temperature of the extracted water while ensuring a substantially steady hydrostatic pressure in the body of water.
Inventors
- 👤 Pierre Marcel Maugis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:33
CPC Classifications
F; F24; F24T; F24T10/00; F24T10/20; Y; Y02; Y02E; Y02E10/00; Y02E10/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
17 words
A system as defined in claim 1 wherein said channels form downwardly diverging passages in the soil.
Claim 2
Dependent Claim
29 words
A system as defined in claim 1 wherein said outer sheath and said inner pipe are interconnected by a fluidtight collar at the lower end of said air space.
Claim 3
Dependent Claim
22 words
A system as defined in claim 1 wherein said locations are mutually separated by a distance of substantially 500 to 1000 meters.
Claim 4
Dependent Claim
62 words
A system as defined in claim 3 wherein said inner pipe comprises a lower section depending from said collar and an upper section rising above said collar, said lower section being provided with a perforated plug originally serving to retain a removable packing in said lower section and in said outer sheath above said collar prior to introduction of said upper section.
Claim 5
Dependent Claim
27 words
A system as defined in claim 5 wherein said outer sheath descends beyond said collar around said lower section and forms therewith a space occupied by soil.
References Cited (Backward Citations)
US2637531A
Cited
US2932313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |