Polyethylene oxides, glycols, and amines U.S.5,024,736 6/18/91 Clauss et al. Disubstituted ethane sulfonic compounds U.S.4,990,224 2/5/91 Mahmoud Urea, sodium lauryl sulfate, and tosyl or mesyl sulfonic acid U.S.4,975,159 12/4/90 Dahms Alkoxylated lactam amides U.S.4,954,226 9/4/90 Mahmoud Urea and glycerin U.S.4,948,474 8/14/90 Miljkovic Alkylarylene U.S.4,897,165 1/30/90 Bernards et al. Copper/sulfuric acid ratios U.S.4,781,801 11/1/88 Frisby Polyether surfactants þ sulfurized benzene þ grain refiner U.S.4,673,467 6/16/87 Nee Polyethers þ mercaptoimidazole þ sulfurized benzene U.S.4,555,315 11/26/85 Barbieri et al. Polyethers þ organic divalent sulfur compound þ tertiary alkyl amine with polyepichlorohydrin U.S.4,551,212 11/5/85 Rao et al. Phenazine dyestuffs U.S.4,540,473 11/22/83 Bindra et al. S-containing anions other than SO 4 U.S.4,521,282 7/11/84 Tremmel Sulfamic acid U.S.4,490,220 12/25/84 Houman Nitrogen-carbon-sulfur compound U.S.4,430,173 2/7/84 Boudot et al. Sodium salt of W-sulfo-n-propyl N,N-diethyldithiocarbamate, PEG, and crystal violet U.S.4,376,685 6/24/81 Watson Alkylated polyalkyleneimine U.S.4,347,108 8/31/82 Willis Nitrogen-and sulfur-containing compounds U.S.4,336,114 6/22/82 Mayer et al. Phthalocyanine, tertiary alkyl amine with polyepichloro hydrin, polyethyleneimine U.S.4,334,966 12/2/81 Beach et al. Polyether, mercaptoimidazole, sulfurized benzene U.S.4,310,392 1/12/82 Kohl Phenolphthalein U.S.4,272,335 2/19/80 Combs Substituted phthalocyanine radical U.S.4,242,181 12/30/80 Malak Regular coffee U.S.4,134,803 1/16/79 Eckles et al. Disulfides, sulfonic acids, and aliphatic aldehyde U.S.4,110,176 8/29/78 Creutz et al.