Sterilization indicators containing amino acid(s) and pH indicator
US4328182A · kind A · utility
19Cited by
10References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 16, 1980 |
| Grant date | May 4, 1982 |
| Priority date | — |
| Expiry date | Oct 16, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S435/805
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An indicator which is used for indicating the completion of a sterilization process in which an article to be sterilized is exposed to formaldehyde vapor either dry or mixed with steam. The indicator comprises a mixture of preferably two amino acids and a pH indicator impregnated in a paper carrier. The amino acids and pH indicator are such that the change point of the pH indicator lies within the range of the change of pH value of the amino acid mix which occurs on exposure of the amino acids to formaldehyde vapor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.