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US 6,149,863 AGranted
Method of steam sterilization using a steam sterilization indicator
AssigneeAlbert Browne Limited
InventorPhillip Richard James
Life of this patent
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Abstract
A steam-sensitive ink comprises, as active ingredient, a tetrazolium salt. The ink may be coated on, or impregnated into, a substrate to form a steam sterilization indicator.
Claims21
A method of steam sterilization of an article comprising:
- exposing to steam both said article and a steam sterilization indicator, said indicator comprising a tetrazolium salt that is reduced to a formazan compound or salt thereof and thereby undergoes a color change as a direct result of exposure to steam sterilization conditions.
Dependencies are inferred from the claim text.