Oligodynamic silver treating process and microbicidal product

Claim 1

A PROCESS FOR DEPOSITING, ON THE SURFACE OF AN ARTICLE, A SPARINGLY WATER-SOLUBLE SILVER SALT TO RENDER SAID SURFACE LETHAL TO BACTERIA COMING IN CONTACT THEREWITH, WHICH PROCESS CONSISTS OF WETTING THE SURFACE OF SAID ARTICLE WITH AN AQUEOUS SOLUTION HAVING DISSOLVED THEREIN A SILVER SALT, A WATER-SOLUBLE, VOLATILE BASIC NITROGEN COMPOUND A PORTIONN OF WHICH IS COMBINED WITH THE SILVER OF SAID SILVER SALT TO FORM COMPLEX SILVER AMMONIO CATIONS, AND A SECOND SALT OTHER THAN A SILVER SALT WHICH FURNISHES ANIONS CAPABLE OF FORMING A SILVER SALT HAVING A SOLUBILITY IN WATER FORM 0.00002 TO 0.5% BY WEIGHT; SAID ANIONS BEING PRESENT IN AN AMOUNT IN SUBSTANTIAL EXCESS OF THAT REQUIRED TO PRECIPITATE ALL OF THE SILVER PRESENT IN NEUTRAL SOLUTION, SAID NITROGEN COMPOUND BEING PRESENT IN AN AMOUNT IN SUBSTANTIAL EXCESS OF THAT REQUIRED TO PREVENT PRECIPITATION OF THE SPARINGLY WATER-SOLUBLE SILVER SALTFROM THE SOLUTION, AND SAID SOLUTION BEING FREE OF ANIONS CAPABLE OF COMBINING WITH THE CATION OF SAID SECOND SALT TO FORM A SPARINGLY WATER-SOLUBLE COMPOUND IN ADDITION TO SAID SPARINGLY WATER-SOLUBLE SILVER SALT; AND DRYING THE ARTICLE SO-WETTED TO DEPOSIT THE SPARINGLY WATER-SOLUBLE SILVER SALT ON THE SURFACE IN TIGHTLY ADHERENT, BACTERICIDALLY ACTIVE FORM.