Patent ID: 7347934
Filing Date: 2008-03-25
Classification: A01N,C02F

Abstract:
1. A dispenser for killing microorganisms in a body of water comprising; a first housing having a water accessible compartment containing a silver ion donor for releasing silver ions into the body of water when contacted by the body of water; and a second housing having a water accessible compartment containing a bromine donor and a chelating agent selected from the group consisting of 1-bromo-3-chloro-5,5 dimethylhydantoin, 1,3 dichloro-5,5 dimethylhydantoin, 1,3 dibromo-5,5 dimethylhydantoin, anthranilate, saccharinate and sulfadiazine for releasing the bromine into the body of water, said chelating agent maintaining a biocidal effective level of silver ions and bromine in the body of water when the silver ions and bromine are placed together in the same body of water wherein the level of bromine can be maintained at lower levels than if bromine were used alone in killing microorganisms in the body of water.