May 28, 2002

A device for indicating residence time in a liquid disinfection solution, the device comprising a visually observable detector of exposure of the device to the solution, the device being selected such that upon exposure of the device to the solution the detector visibly changes after a predetermined time interval.

11

May 28, 2002

08/644,932

May 13, 1996

436/1   422/55 422/57

A61L   2/26   (20060101)   A61L   2/28   (20060101)   G01N   31/22   (20060101)  

This is a continuation of application Ser. No. 08/197,155 filed Feb. 16, 1994, now abandoned.

436/1   422/55   422/57