Compositions for and processes of removing stains

Claim 2

A STAIN REMOVING COMPOSITION CONSISTING ESSENTIALLY OF A HYDROSULFITE SELECTED FROM THE GROUP CONSISTING OF SODIUM AND ZINC HYDROSULFITE, AN ORGANIC BUFFERING AGENT FROM THE CLASS CONSISTING OF ACETIC ACID, HYDROXYCARBOXYLIC ACIDS, DIHYDROXYETHYL AMINO ACETIC ACID, AMINO CARBOXYLIC ACIDS CONTAINING MORE THAN ONE CARBOXYLIC ACID GROUP IN THE ALPHA POSITION TO A NITROGEN ATOM, WATER SOLUBLTE SALTS OF THESE ACIDS AND MIXTURES OF SUCH SALTS AND ACIDS, AND AN ACTIVATING AGENT FROM THE CLASS CONSISTING OF 2, 5-DIHYDROXY BENZOQUINONES; 2-HYDROXY NAPHTHOQUINONES; SUBSTITUTED 2, 5-DIHYDROXY BENZOQUINONES AND 3-SUBSTITUTED 2-HYDROXY NAPHTHOQUINONES IN WHICH EACH SUBSTITUTENT IS FROM THE GROUP CONSISTING OF CI, BR AND NO2; SALICYCLIC ACID, ITS AMINO DERIVATIVES AND SALTS OF THESE COMPOUNDS, SAID HYDROSULFITE BEING PRESENT AT 0.510% BY WEIGHT, SAID ACTIVATING AGENT BEING PRESENT AT 0.01 TO 10 PARTS BY WEIGHT OF SAID HYDROSULFITE AND SAID BUFFERING AGENT BEING PRESENT AT 0.1 TO 20 PARTS BY WEIGHT OF SAID HYDROSULFITE AND HAVING A PH WITHIN THE RANGE OF ABOUT 5 TO 10 WHEN SAID COMPOSITION IS ADMIXED WITH WATER.

Claim 3

THE PROCESS OF REMOVING STAINS FROM A SUBSTRATE WHICH COMPRISES SUBJECTING THE SUBSTRATE TO THE ACTION OF AN AQUEOUS SOLUTION WHILE IT CONTAINS HYDROSULFITE IONS, IONS OF AN ORGANIC BUFFERING AGENT FROM THE CLASS CONSISING OF ACETIC ACID, HYDROXYCARBOXYLIC ACIDS, DIHYDROXYETHYL AMINO ACETIC ACID, AMINO CARBOXYLIC ACIDS CONTAINING MORE THAN ONE CARBOXYLIC ACID GROUP IN THE ALPHA POSITION TO A NITROGEN ATOM, WATER SOLUBLE SALTS OF THESE ACIDS AND MIXTURES OF SUCH SALTS AND ACIDS AND ANIONS OF AN ACTIVATING AGENT FROM THE CLASS CONSISTING OF 2, 5DIHYDROXY BENZOQUINONES; 2-HYDROXY NAPHTHOQUINONES; SUBSTITUTED 2, 5-HYDROXY BENZOQUINONES AND 3-SUBSTITUTED 2-HYDROXY NAPHTHOQUINONES IN WHICH EACH SUBSTITUENT IS FROM THE GROUP CONSISTING OF CI, BR AND NO2; SALICYLIC ACID ITS AMINO DERIVATIVES AND SALTS OF THESE COMPOUNDS, SAID HYDROSULFITE BEING PRESENT AT 0.5-10% BY WEIGHT, SAID ACTIVATING AGENT BEING PRESENT AT 0.01 TO 10 PARTS BY WEIGHT OF SAID HYDROSULFITE AND SAID BUFFERING AGENT BEING PRESENT AT 0.1 TO 20 PARTS BY WEIGHT OF SAID HYDROSULFITE TO PROVIDE, WHEN SAID COMPOSITION IS ADMIXED WITH WATER, A SOLUTION BEING MAINTAINED IN THE PH RANGE OF ABOUT 5 TO 10.

Claim 4

THE PROCESS OF REMOVING STAINS FROM A SUBSTRATE WHICH COMPRISES SUBJECTING THE SUBSTRATE TO THE ACTION OF AN AQUEOUS SOLUTION WHILE IT CONTAINS HYDROSULFITE IONS, IONS OF AN ORGANIC BUFFERING AGENT FROM THE CLASS CONSISING OF ACETIC ACID, HYDROXYCARBOXYLIC ACIDS, DIHYDROXYETHYL AMINO ACETIC ACID, AMINO CARBOXYLIC ACIDS CONTAINING MORE THAN ONE CARBOXYLIC ACID GROUP IN THE ALPHA POSITION TO A NITROGEN ATOM, WATER SOLUBLE SALTS OF THESE ACIDS AND MIXTURES OF SUCH SALTS AND ACIDS AND ANIONS OF AN ACTIVATING AGENT FROM THE CLASS CONSISTING OF 2, 5DIHYDROXY BENZOQUINONES; 2-HYDROXY NAPHTHOQUINONES; SUBSTITUTED 2, 5-HYDROXY BENZOQUINONES AND 3-SUBSTITUTED 2-HYDROXY NAPHTHOQUINONES IN WHICH EACH SUBSTITUENT IS FROM THE GROUP CONSISTING OF CI, BR AND NO2; SALICYLIC ACID ITS AMINO DERIVATIVES AND SALTS OF THESE COMPOUNDS, SAID HYDROSULFITE BEING PRESENT AT 0.5-10% BY WEIGHT, SAID ACTIVATING AGENT BEING PRESENT AT 0.01 TO 10 PARTS BY WEIGHT OF SAID HYDROSULFITE AND SAID BUFFERING AGENT BEING PRESENT AT 0.1 TO 20 PARTS BY WEIGHT OF SAID HYDROSULFITE TO PROVIDE, WHEN SAID COMPOSITION IS ADMIXED WITH WATER, A SOLUTION BEING MAINTAINED IN THE PH RANGE OF ABOUT 5 TO 10.