Biological freezing apparatus
US4870829A · kind A · utility
Inventors
Key dates
| Filing date | Jul 11, 1988 |
| Grant date | Oct 3, 1989 |
| Priority date | — |
| Expiry date | Jul 11, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D25/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Biological freezing apparatus for use on unmodified laboratory liquid cryogen storage container including a specimen holder for holding biological specimens to be frozen and a motor for lowering the specimen holder into the interior of the laboratory liquid cryogen storage containers. An electronic circuit controls the motor so that the specimen holder moves into the interior of the laboratory liquid cryogen storage container at a predetermined desired rate. The specimen holder is constructed of a non-thermally conductive material and this plus its configuration along with the movement of the specimen holder downward at a predetermined rate allows freezing of live biological specimens without doing substantial damage to the specimens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.