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US 6,659,036 B2Granted
Plasma sterilization indicator
AssigneeSakura Color Products Corporation
InventorsTakeshi Omatsu, Satoshi Maruyama
Life of this patent
Estimating the term…
Abstract
There is provided a plasma sterilization indicator enabling an accurate detection of the end-point of plasma sterilization. This invention relates to a plasma sterilization indicator comprising a support and, as formed thereon, a color-change layer comprised of a variable color ink composition containing an anthraquinone dye having at least one kind of amino groups, primary and/or secondary.
Claims5
A method of detecting the sterility of a sterilizing load which comprises:
- disposing a plasma sterilization indicator in a plasma sterilization atmosphere, wherein the plasma sterilization indicator comprises a support, and, as formed thereon, a color change layer comprised of a variable-color ink composition containing an anthraquinone dye having at least one amino group selected form the group consisting of a primary amino group and a secondary amino group;
- and
- checking to see a change in color of said color-change layer.
Dependencies are inferred from the claim text.