Drug – bio-affecting and body treating compositions – Inorganic active ingredient containing – Elemental bromine or bromine compound containing
Reexamination Certificate
2007-12-18
2007-12-18
Ritter, Johann (Department: 1616)
Drug, bio-affecting and body treating compositions
Inorganic active ingredient containing
Elemental bromine or bromine compound containing
C424S613000, C424S661000, C424S663000, C424S703000, C424S722000
Reexamination Certificate
active
10843030
ABSTRACT:
The invention includes convenient methods of preparing: (1) highly concentrated liquid bromine-containing biocidal solutions, (2) highly concentrated mixed halogen liquid bromine and chlorine-containing biocidal solutions, and (3) high-activity bromine-containing biocidal solids, all having excellent physical and chemical stability. One method yields solutions that have concentrations of bromine in excess of 18% as Br2(8% as Cl2) in which the mole ratio of hydroxide ion to hydrogen ion source is at least 1.9:1. Another method employs elemental bromine in conjunction with a solid organic or inorganic halogenating agent to yield halogen solutions at concentrations greater than 22.9% as Br2(10.2% as Cl2). This method can be performed under conditions that exceed the solubility of the active ingredient such that it crystallizes and is recovered as a hydrated or anhydrous salt in good yield.
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Harvey Michael S.
Howarth Jonathan N.
Arnold Ernst V
Enviro Tech Chemical Services, Inc.
Millemann Audrey A.
Ritter Johann
Weintraub Genshlea et al.
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