.alpha.-olefin/maleic anhydride copolymers as antifoulants in qu
1,3-Dihydroxy acetone as an oxygen scavenger for water
2,3-dihydroxyterephthalamides as highly effective metal ion sequ
2-stage ultrafiltration process for photographic emulsions
2-stage ultrafiltration system for photographic emulsions
4-alkyl and aryl semicarbazides as oxygen scavengers
5/2-Way commutating valve, particularly for reverse-flush filter
A ceramic filter for semi-ultrafiltration
A porous membrane for blood components and method for manufactur
Abatement of hydrogen sulfide with epoxides
Above ground waste water disposal system
Abrasion-resistant carrier catalyst
Absorbent agents for clean-up of liquid hydrocarbons
Absorbent bag
Absorbent of .beta..sub.2 -microglobulin
Absorbent of autoantibody and immune complexes, adsorbing device
Absorbent pillow
Absorbent products for hydrocarbons
Absorbents
Absorption apparatus including rotary valve