Apparatus and process for quick freezing of blood plasma
US4790141A · kind A · utility
23Cited by
13References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1987 |
| Grant date | Dec 13, 1988 |
| Priority date | — |
| Expiry date | Dec 14, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D2400/30
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Quick cryogenic freezing of blood plasma is accomplished by providing a conductive cylinder mounted in a nitrogen container, the cylinder loosely fitting a standard plasma bottle to provide for heat transfer from the bottle by conduction and space for passage of vapor, the cylinder walls having longitudinally extending ducts connected at their upper ends to the head space above the liquid nitrogen and discharging through injection ports spaced along the ducts and directed inwardly against the bottle, the vapor being drawn along the sides of the bottle and discharged outwardly of the apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.