Ultra-low temperature bio-sample storage system
US7621148B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Aug 7, 2007 |
| Grant date | Nov 24, 2009 |
| Priority date | — |
| Expiry date | Apr 2, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2500/06
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An ultra low temperature freezer is optimized with a combination of vacuum and fiberglass insulation for long-term biological storage with accurate process cooling with critical temperature performance. A programmable cooling and cryogenic freezing system uses sealed liquid nitrogen for cooling and freezing. A hybrid completely non-mechanical system exhibits temperature uniformity and reliability, saves space, requires extremely low operating energy and minimizes need for air conditioning in the operating environment. Top-located components control the flow of liquid nitrogen even under flooding conditions. Sectioned inner doors mitigate thermal transfer to other samples and maintain ULT while accessing the freezer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.