Sterilization indicator
First Claim
1. AN ARTICLE HAVING APPLIED THERETO A STERILIZATION IN DICATOR COMPRISING, A COATING CONSISTING ESSENTIALLY OF A NON-REACTIVE, WATER-INSOLUBLE BUT PARTIALLY WATERL-PERMEABLE RESIN, A PARA-PHENYLENEDIAMINE HAVING AT LEAST ONE ACTIVE AMINO GROUP, AND A REACTANT FOR PRODUCING AN AZOMETHINE DYE WITH SAID PARA-PHENYLENEDIAMINE, SAID REACTANT BEING SELECTED FROM THE GROUP CONSISTING OF NAPHTHOLS, PHENOLS, PYRAZOLONES, AND ACETO ACETIC ESTERS AND DERIVATIVES THEREOF AN ACETO-ACETIC ACID LINKAGE, FOR EACH 100 PARTS BY WEIGHT OF RESIN THERE BEING EMPLOYED FROM 0.25 TO 25 PARTS BY WEIGHT OF SAID PARA-PHENYLENEDIAMINE, AND FROM 0.75 TO 75 PARTS BY WEIGHT OF SAID REACTANT FOR FORMING AZOMETHINE DYES THEREWITH, SAID DYE-FORMING CONSTITUENTS BEING PRESENTNT IN SUFFICIENT QUANTITY TO COLOR SAID COATING UPON EXPOSE TO STEAM UNDER STERILIZING CONDITIONS.
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Citations
1 Claim
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1. AN ARTICLE HAVING APPLIED THERETO A STERILIZATION IN DICATOR COMPRISING, A COATING CONSISTING ESSENTIALLY OF A NON-REACTIVE, WATER-INSOLUBLE BUT PARTIALLY WATERL-PERMEABLE RESIN, A PARA-PHENYLENEDIAMINE HAVING AT LEAST ONE ACTIVE AMINO GROUP, AND A REACTANT FOR PRODUCING AN AZOMETHINE DYE WITH SAID PARA-PHENYLENEDIAMINE, SAID REACTANT BEING SELECTED FROM THE GROUP CONSISTING OF NAPHTHOLS, PHENOLS, PYRAZOLONES, AND ACETO ACETIC ESTERS AND DERIVATIVES THEREOF AN ACETO-ACETIC ACID LINKAGE, FOR EACH 100 PARTS BY WEIGHT OF RESIN THERE BEING EMPLOYED FROM 0.25 TO 25 PARTS BY WEIGHT OF SAID PARA-PHENYLENEDIAMINE, AND FROM 0.75 TO 75 PARTS BY WEIGHT OF SAID REACTANT FOR FORMING AZOMETHINE DYES THEREWITH, SAID DYE-FORMING CONSTITUENTS BEING PRESENTNT IN SUFFICIENT QUANTITY TO COLOR SAID COATING UPON EXPOSE TO STEAM UNDER STERILIZING CONDITIONS.
Specification