Patent Document ID: 5585469
Application ID: 08316329
Patent Status: 1

Claim One:
1. A dyeing agent for staining a biological sample, which comprises an azo dye and a xanthene dye suitable for supravital staining of cells and tissue, and a pH buffer, said azo and xanthene dyes being nonpolar molecular dyes which, upon blending, cause no agglutination or sedimentation of the dyes and which do not precipitate or agglutinate sugars, proteins or glycoproteins dissolved in said biological sample; wherein the blended azo and xanthene dyes are suitable for staining at least two objects, to different respective degrees in color hue or in dyeing strength depending on the respective objects; and wherein the blended azo and xanthene dyes are suitable for staining respective components of a single object to different degrees in color hue or in dyeing strength.