Patent US2589017A successfully refreshed from Google Patents.
Patent US3615079A successfully refreshed from Google Patents.
US3615079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas heat exchanger having liquid heat carrier
Assignee: GRENOBLOISE ETUDE APPL
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Filing: 1968-03-22
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Granted: 1971-10-26
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Expires: 1988-03-22
Abstract
Abstract IN THIS EXCHANGER A GAS TO BE COOLED OR HEATED IS PLACED IN DIRECT CONTACT WITH A LIQUID HEAT CARRIER BY BUBBLING THE GAS THERETHROUGH.
Inventors
- 👤 Georges Cohen De Lara
- 👤 Michel Delachanal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:03
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |