Freezing agent and container
US4597266A · kind A · utility
33Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 28, 1985 |
| Grant date | Jul 1, 1986 |
| Priority date | — |
| Expiry date | May 28, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D2331/804
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A freezing agent for maintaining supercold temperatures. Solid carbon dioxide is impregnated with liquid nitrogen so that the liquid nitrogen diffuses through the lattice of crystals making up the solid carbon dioxide. The liquid nitrogen maintains the solid carbon dioxide at supercold temperature for a long period of time. The nitrogen-impregnated solid carbon dioxide can be in the form of nuggets for lining or packing a cooling container, and a frozen biological sample can be maintained at supercold temperature within the container for many hours.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.