Biocidal compositions and use thereof containing a synergistic mixture of n-tributyl tetradecyl phosphonium chloride and bromochlorohydantoin

Granted: Nov 5, 1991 Filed: Aug 13, 1990

This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.