US3587723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transferrer of the thermodynamic characteristics of two gases
Assignee: Individual
•
Filing: 1968-07-17
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Granted: 1971-06-28
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Expires: 1988-07-17
Abstract
Abstract A ROTARY EXCHANGER IN WHICH THE TERMODYNAMIC CHARACTERISTICS OF TWO GAS CURRENTS ARE TRANSFERRED FROM ONE CURRENT TO THE OTHER WHILE THEY ARE BEING PASSED THROUGH THE EXCHANGER BODY IN ZONES SEPARATED FROM ONE ANOTHER AND IN WHICH ENTRAPPED GAS FROM ONE CURRENT IS REMOVED IN AN INTERMEDIATE PURGING ZONE BY THE OTHER CURRENT BEING PASSED THERETHROUGH AND RETURNED TO THE FIRST CURRENT.
Inventors
- 👤 Per Gunnar Norback
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:42
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; F24F3/1423; F28; F28D; F28D19/00; F28D19/04; F28D19/041; F28D19/042; F28D19/047; F28D19/048; F24F2003/1458; F24F2003/1464; F24F2203/00; F24F2203/10; F24F2203/1004; F24F2203/1032; F24F2203/104; F24F2203/1068; F24F2203/108; F24F2203/1084; F24F2203/1096; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/01; Y10S165/013; Y10S165/016; Y10S165/02
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |