US3794566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor-liquid equilibrium still
Assignee: Queen's University
•
Filing: 1971-10-28
•
Granted: 1974-02-26
•
Expires: 1991-10-28
Abstract
Abstract In a vapor-liquid equilibrium still, heated liquid and vapor is conveyed from a heating chamber upwardly, in the manner of a Cottrell pump, around an inner equilibrium chamber to a heated liquid trap above the inner equilibrium chamber. Vapor from the heated liquid trap is bubbled through liquid in the inner equilibrium chamber, whilst liquid from the heated liquid trap is returned to the heating chamber. The heated liquid and vapor conveyed upwardly around the inner equilibrium chamber provides a thermal envelope therearound and ensures truly adiabatic conditions in the inner equilibrium chamber.
Inventors
- 👤 J Raal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:51
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/14; Y; Y10; Y10S; Y10S203/00; Y10S203/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |