Freeze-drying of solid, liquid or paste-like products
US4035924A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 27, 1975 |
| Grant date | Jul 19, 1977 |
| Priority date | — |
| Expiry date | Aug 27, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B31/024
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In the lyophilization of solid, liquid or pasty products the product to be lyophilized is placed in an open secondary container of flexible material which is capable of being subsequently closed and lyophilized in a lyophilization apparatus with the container kept open. On completion of lyophilization the container is closed and the closed container withdrawn from the apparatus. Preferably the container is in the form of a bag, e.g. a heat-sealable plastic bag. A lyophilization apparatus is provided with means for supporting secondary containers accommodating product to be lyophilized, means for keeping the secondary containers open during lyophilization and means for closing the containers on completion of lyophilization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.