Combined record card and sterilization indicator

Claim 1

In a combined permanent record card and sterilization indicator for use in a sterilizer wherein one or more of such cards are adapted to be strategically positioned within the sterilizer and into which packs of sterilizable articles are positioned for sterilization, the invention comprising: a semirigid card having a sterilization indicator and a comparison standard thereon; said sterilization indicator being of a sensitive substance positioned on and along a substantial extent of said card: said sterilization indicator substance being of a color variably changeable to another color along portions thereof when corresponding locations of the sterilizer are subjected to varying conditions of sterilization; said comparison standard being adjacent said sterilization indicator; said comparison standard being of a color different from said color of said sterilization indicator to indicate the desired color to which the sensitive substance of said sterilization indicator must change to evidence that the corresponding portions along said sterilization indicator have been subjected to desired sterilization conditions; said standard being of a substance to remain unaffected and unchangeable in color when simultaneously subjected to the same conditions of sterilization as said sensitive substance; and indices means on said card identifying the articles with which said card is employed to indicate that the same have been subjected to the desired sterilization conditions.