73823825
Sep 6, 1989
Nov 16, 1993
CHEMICALS AND CHEMICAL PREPARATIONS FOR CHEMICAL SEPARATION AND ANALYSIS; POLYMERS FOR ANALYSIS AND SEPARATION OF ORGANIC CHEMICALS, BIOCHEMICALS, PROTEINS AND NUCLEIC ACIDS; POLYMER PARTICLES OR BEADS; BEADS OR PARTICLES OF GELATIN, CELLULOSE OR STARCH, ALL FOR USE IN SCIENCE, CHEMISTRY AND THE BIOCHEMICAL AND PHARMACEUTICAL INDUSTRIES; PLASTIC MATERIAL IN FORM OF FIBERS FOR SEPARATION AND ANALYSIS PURPOSES IN SCIENCE, CHEMISTRY AND THE BIOCHEMICAL AND PHARMACEUTICAL INDUSTRIES
Chemicals