US4119535A — Method of sanitizing a volume of water in conjunc…

Claim 1

Independent Claim 343 words

A supplemental treatment for swimming pool water and the like, which is primarily sanitized by maintenance of an available chlorine content in such water, introduced therein from known chlorine-containing materials by means of known procedures, comprising, following a previous chlorination of such water, the steps of ascertaining by test, the pH of such water, adding to such water an amount, per unit volume of water, of a supplemental material sufficient to bring the pH of the water from the test value to between approximately 7.2 and 7.4, which supplemental material comprises a mixture of 1,3-dibromo-5,5-dimethylhydantoin and an inorganic reactive compound therefor which, in the presence of water, will readily combine with said hydantoin to release bromine therefrom, with such inorganic compound being present in excess of that required to release all of the bromine content of said hydantoin, utilizing NaCO 3 as said reactive compound, if said test discloses the pH of the water to be treated to below 7.2, the proportions of the materials, by weight, being as follows: ______________________________________ Dibromodimethylhydantoin 1.00 NaCO.sub.3 29.00 ______________________________________ introducing said supplemental material into the water to be treated in approximately the following amounts: ______________________________________ Supplemental Material per pH Reading 10,000 Gallons ______________________________________ up from 6.8 2 lbs. (4 cups) up from 7.0 1 lb. (2 cups) up from 7.1-7.2 8 oz. (1 cup) ______________________________________ whereby the excess therein of said reactive compound will bring the pH of the water treated therewith up to approximate 7.2-7.4, said amounts of hydantoin and reactive compound being so proportioned with respect to the amount of excess reactive compound that upon said addition of such material to the water to be treated, to effect the specified pH change, the amount of hydantoin will be sufficient to provide a desired amount of available bromine per unit volume of water, not greater than a predetermined maximum value suitable for sanitizing purposes in accordance with established sanitizing techniques, and thereafter, if necessary, adding available chlorine to such water in quantities sufficient to provide a predetermined residual amount of available halogen in such water.

Claim 2

Dependent Claim 343 words

A supplemental treatment for swimming pool water and the like, which is primarily sanitized by maintenance of an available chlorine content in such water, introduced therein from known chlorine-containing materials by means of known procedures, comprising, following a previous chlorination of such water, the steps of ascertaining by test, the pH of such water, adding to such water an amount, per unit volume of water, of a supplemental material sufficient to bring the pH of the water from the test value to between approximately 7.2 and 7.4, which supplemental material comprises a mixture of 1,3-dibromo-5,5-dimethylhydantoin and an inorganic reactive compound therefor which, in the presence of water, will readily combine with said hydantoin to release bromine therefrom, with such inorganic compound being present in excess of that required to release all of the bromine content of said hydantoin, utilizing NaCO 3 as said reactive compound, if said test discloses the pH of the water to be treated to below 7.2, the proportions of the materials, by weight, being as follows: ______________________________________ Dibromodimethylhydantoin 1.00 NaCO.sub.3 29.00 ______________________________________ introducing said supplemental material into the water to be treated in approximately the following amounts: ______________________________________ Supplemental Material per pH Reading 10,000 Gallons ______________________________________ up from 6.8 2 lbs. (4 cups) up from 7.0 1 lb. (2 cups) up from 7.1-7.2 8 oz. (1 cup) ______________________________________ whereby the excess therein of said reactive compound will bring the pH of the water treated therewith up to approximate 7.2-7.4, said amounts of hydantoin and reactive compound being so proportioned with respect to the amount of excess reactive compound that upon said addition of such material to the water to be treated, to effect the specified pH change, the amount of hydantoin will be sufficient to provide a desired amount of available bromine per unit volume of water, not greater than a predetermined maximum value suitable for sanitizing purposes in accordance with established sanitizing techniques, and thereafter, if necessary, adding available chlorine to such water in quantities sufficient to provide a predetermined residual amount of available halogen in such water.

Claim 3

Dependent Claim 343 words

A supplemental treatment for swimming pool water and the like, which is primarily sanitized by maintenance of an available chlorine content in such water, introduced therein from known chlorine-containing materials by means of known procedures, comprising, following a previous chlorination of such water, the steps of ascertaining by test, the pH of such water, adding to such water an amount per unit volume of water, of a supplemental material sufficient to bring the pH of the water from the test value to between approximately 7.2 and 7.4, which supplemental material comprises a mixture of 1,3-dibromo-5,5-dimethylhydantoin and an inorganic reactive compound therefor which, in the presence of water, will readily combine with said hydantoin to release bromine therefrom, with such inorganic compound being present in excess of that required to release all of the bromine content of said hydantoin, utilizing NaHSO 4 as said reactive compound, if said test discloses the pH of the water to be treated to be above 7.4, the proportions of the materials, by weight, being as follows: ______________________________________ Dibromodimethylhydantoin 1.00 NaHSO.sub.4 29.00 ______________________________________ introducing said supplemental material into the water to be treated in approximately the following amounts: ______________________________________ Supplemental Material per pH Reading 10,000 Gallons ______________________________________ up to 7.6 4 oz. (2/3cup) up to 7.8 8 oz. (1 cup) up to 8.0 1 lb. (2 cups) ______________________________________ whereby the excess therein of said reactive compound will bring the pH of the water treated therewith down to approximately 7.4-7.2, said amounts of hydantoin and reactive compound being so proportioned with respect to the amount of excess reactive compound that upon said addition of such material to the water to be treated, to effect the specified pH change, the amount of hydantoin will be sufficient to provide a desired amount of available bromine per unit volume of water, not greater than a predetermined maximum value suitable for sanitizing purposes in accordance with established sanitizing techniques, and thereafter, if necessary, adding available chlorine to such water in quantities sufficient to provide a predetermined residual amount of available halogen in such water.

Claim 4

Dependent Claim 343 words

A supplemental treatment for swimming pool water and the like, which is primarily sanitized by maintenance of an available chlorine content in such water, introduced therein from known chlorine-containing materials by means of known procedures, comprising, following a previous chlorination of such water, the steps of ascertaining by test, the pH of such water, adding to such water an amount per unit volume of water, of a supplemental material sufficient to bring the pH of the water from the test value to between approximately 7.2 and 7.4, which supplemental material comprises a mixture of 1,3-dibromo-5,5-dimethylhydantoin and an inorganic reactive compound therefor which, in the presence of water, will readily combine with said hydantoin to release bromine therefrom, with such inorganic compound being present in excess of that required to release all of the bromine content of said hydantoin, utilizing NaHSO 4 as said reactive compound, if said test discloses the pH of the water to be treated to be above 7.4, the proportions of the materials, by weight, being as follows: ______________________________________ Dibromodimethylhydantoin 1.00 NaHSO.sub.4 29.00 ______________________________________ introducing said supplemental material into the water to be treated in approximately the following amounts: ______________________________________ Supplemental Material per pH Reading 10,000 Gallons ______________________________________ up to 7.6 4 oz. (2/3cup) up to 7.8 8 oz. (1 cup) up to 8.0 1 lb. (2 cups) ______________________________________ whereby the excess therein of said reactive compound will bring the pH of the water treated therewith down to approximately 7.4-7.2, said amounts of hydantoin and reactive compound being so proportioned with respect to the amount of excess reactive compound that upon said addition of such material to the water to be treated, to effect the specified pH change, the amount of hydantoin will be sufficient to provide a desired amount of available bromine per unit volume of water, not greater than a predetermined maximum value suitable for sanitizing purposes in accordance with established sanitizing techniques, and thereafter, if necessary, adding available chlorine to such water in quantities sufficient to provide a predetermined residual amount of available halogen in such water.

Claim 5

Dependent Claim 318 words

A supplemental treatment for swimming pool water and the like, which is primarily sanitized by maintenance of an available chlorine content in such water, introduced therein from known chlorine-containing materials by means of known procedures, comprising, following a previous chlorination of such water, the steps of ascertaining by test, the pH of such water, adding to such water an amount, per unit volume of water, of a supplemental material sufficient to bring the pH of the water from the test value to between approximately 7.2 and 7.4, which supplemental material comprises a mixture of 1,3-dibromo-5,5-dimethylhydantoin and an inorganic reactive compound therefor which, in the presence of water, will readily combine with said hydantoin to release bromine therefrom, with such inorganic compound being present in excess of that required to release all of the bromine content of said hydantoin, utilizing NaCO 3 as said reactive compound, if said test discloses the pH of the water to be treated to be below 7.2, the proportions of the materials, by weight, being as follows: ______________________________________ Dibromodimethylhydantoin 1.00 NaCO.sub.3 29.00 ______________________________________ introducing in the water to be treated a sufficient amount of such supplemental material, per unit volume of water, that the excess therein of said reactive compound will bring the pH of the water treated therewith up approximately 7.2 to 7.4, said amounts of hydantoin and reactive compound being so proportioned with respect to the amount of excess reactive compound that upon said addition of such material to the water to be treated, to effect the specified pH change, the amount of hydantoin will be sufficient to provide a desired amount of available bromine per unit volume of water, not greater than a predetermined maximum value suitable for sanitizing purposes in accordance with established sanitizing techniques, and thereafter, if necessary, adding available chlorine to such water in quantities sufficient to provide a predetermined residual amount of available halogen in such water.

Claim 6

Dependent Claim 318 words

A supplemental treatment for swimming pool water and the like, which is primarily sanitized by maintenance of an available chlorine content in such water, introduced therein from known chlorine-containing materials by means of known procedures, comprising, following a previous chlorination of such water, the steps of ascertaining by test, the pH of such water, adding to such water an amount, per unit volume of water, of a supplemental material sufficient to bring the pH of the water from the test value to between approximately 7.2 and 7.4, which supplemental material comprises a mixture of 1,3-dibromo-5,5-dimethylhydantoin and an inorganic reactive compound therefor which, in the presence of water, will readily combine with said hydantoin to release bromine therefrom, with such inorganic compound being present in excess of that required to release all of the bromine content of said hydantoin, utilizing NaCO 3 as said reactive compound, if said test discloses the pH of the water to be treated to be below 7.2, the proportions of the materials, by weight, being as follows: ______________________________________ Dibromodimethylhydantoin 1.00 NaCO.sub.3 29.00 ______________________________________ introducing in the water to be treated a sufficient amount of such supplemental material, per unit volume of water, that the excess therein of said reactive compound will bring the pH of the water treated therewith up approximately 7.2 to 7.4, said amounts of hydantoin and reactive compound being so proportioned with respect to the amount of excess reactive compound that upon said addition of such material to the water to be treated, to effect the specified pH change, the amount of hydantoin will be sufficient to provide a desired amount of available bromine per unit volume of water, not greater than a predetermined maximum value suitable for sanitizing purposes in accordance with established sanitizing techniques, and thereafter, if necessary, adding available chlorine to such water in quantities sufficient to provide a predetermined residual amount of available halogen in such water.

Claim 7

Dependent Claim 319 words

A supplemental treatment for swimming pool water and the like, which is primarily sanitized by maintenance of an available chlorine content in such water, introduced therein from known chlorine-containing materials by means of known procedures, comprising, following a previous chlorination of such water, the steps of ascertaining by test, the pH of such water, adding to such water an amount, per unit volume of water, of a supplemental material sufficient to bring the pH of the water from the test value to between approximately 7.2 and 7.4, which supplemental material comprises a mixture of 1,3-dibromo-5,5-dimethylhydantoin and an inorganic reactive compound therefor which, in the presence of water, will readily combine with said hydantoin to release bromine therefrom, with such inorganic compound being present in excess of that required to release all of the bromine content of said hydantoin, utilizing NaHSO 4 as said reactive compound, if said test discloses the pH of the water of be treated to be above 7.4, the proportions of the materials, by weight, being as follows: ______________________________________ Dibromodimethylhydantoin 1.00 NaHSO.sub.4 29.00 ______________________________________ introducing in the water to be treated a sufficient amount of such supplemental material, per unit volume of water, that the excess therein of said reactive compound will bring the pH of the water treated therewith down to approximately 7.4 to 7.2, said amounts of hydantoin and reactive compound being so proportioned with espect to the amount of excess reactive compound that upon said addition of such material to the water to be treated, to effect the specified pH change, the amount of hydantoin will be sufficient to provide a desired amount of available bromine per unit volume of water, not greater than a predetermined maximum value suitable for sanitizing purposes in accordance with established sanitizing techniques, and thereafter, if necessary, adding available chlorine to such water in quantities sufficient to provide a predetermined residual amount of available halogen in such water.

Claim 8

Dependent Claim 319 words

A supplemental treatment for swimming pool water and the like, which is primarily sanitized by maintenance of an available chlorine content in such water, introduced therein from known chlorine-containing materials by means of known procedures, comprising, following a previous chlorination of such water, the steps of ascertaining by test, the pH of such water, adding to such water an amount, per unit volume of water, of a supplemental material sufficient to bring the pH of the water from the test value to between approximately 7.2 and 7.4, which supplemental material comprises a mixture of 1,3-dibromo-5,5-dimethylhydantoin and an inorganic reactive compound therefor which, in the presence of water, will readily combine with said hydantoin to release bromine therefrom, with such inorganic compound being present in excess of that required to release all of the bromine content of said hydantoin, utilizing NaHSO 4 as said reactive compound, if said test discloses the pH of the water of be treated to be above 7.4, the proportions of the materials, by weight, being as follows: ______________________________________ Dibromodimethylhydantoin 1.00 NaHSO.sub.4 29.00 ______________________________________ introducing in the water to be treated a sufficient amount of such supplemental material, per unit volume of water, that the excess therein of said reactive compound will bring the pH of the water treated therewith down to approximately 7.4 to 7.2, said amounts of hydantoin and reactive compound being so proportioned with espect to the amount of excess reactive compound that upon said addition of such material to the water to be treated, to effect the specified pH change, the amount of hydantoin will be sufficient to provide a desired amount of available bromine per unit volume of water, not greater than a predetermined maximum value suitable for sanitizing purposes in accordance with established sanitizing techniques, and thereafter, if necessary, adding available chlorine to such water in quantities sufficient to provide a predetermined residual amount of available halogen in such water.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1981-10-09	1982-04-10	1982-10-10	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1985-10-09	1986-04-10	1986-10-10	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1989-10-09	1990-04-10	1990-10-10	$7700.00	Window Closed / Lapsed

Method of sanitizing a volume of water in conjunction with chlorine

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