Unitary biological indicator for gaseous sterilants and process
US5750184A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1995 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Dec 19, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S435/81
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
A biological indicator is formed from two members (or a sheet with one portion folded onto another portion) which are sealed together and form a pathway having three sections. One section opens to the exterior and is preferably configured as a tortuous path. A middle pathway portion downstream of the tortuous path houses a frangible ampule. The frangible ampule contains growth medium for microorganisms. An interior pathway portion (most downstream from the exterior) houses a carrier inoculated with spores of a microorganism. The biological indicator preferably is prepared by a process in which a thermoplastic sheet has the pathway formed by thermoforming and the sealing is by heat sealing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.