Patent US3274769A successfully refreshed from Google Patents.
US3274769A
Expired / Lapsed
US
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Ground heat steam generator
Assignee: J B REYNOLDS Inc
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Filing: 1964-05-05
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Granted: 1966-09-27
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Expires: 1984-05-05
Abstract
No abstract record available.
Inventors
- 👤 Jay B Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:14
CPC Classifications
F; F24; F24T; F24T10/00; F24T10/10; F24T10/13; F24T10/15; F03; F03G; F03G4/00; F03G4/074; Y; Y02; Y02E; Y02E10/00; Y02E10/10; Y10; Y10S; Y10S159/00; Y10S159/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A DEVICE FOR EXTRACTING ENERGY FROM THE EARTH COMPRISING A CYLINDRICAL CONTAINER HAVING A CLOSED END INSERTABLE INTO A WELL AND ADAPTED TO BE FILLED WITH FLUID, A LIQUID PIPE A GAS PIPE EXTENDING INTO SAID CONTAINER AND IN FLUID COMMUNICATION WITH EACH OTHER ADJACENT SAID CLOSED END OF SAID CONTAINER, SAID GAS PIPE BEING OF LARGER DIAMETER THAN SAID LIQUID PIPE.
Claim 2
Independent Claim
62 words
A DEVICE FOR EXTRACTING ENERGY FROM THE EARTH COMPRISING A CYLINDRICAL CONTAINER HAVING A CLOSED END INSERTABLE INTO A WELL AND ADAPTED TO BE FILLED WITH FLUID, A LIQUID PIPE A GAS PIPE EXTENDING INTO SAID CONTAINER AND IN FLUID COMMUNICATION WITH EACH OTHER ADJACENT SAID CLOSED END OF SAID CONTAINER, SAID GAS PIPE BEING OF LARGER DIAMETER THAN SAID LIQUID PIPE.
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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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |