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| US4767554 | 18 Sep 1987 | 30 Ago 1988 | Nalco Chemical Company | Polycarboxylic acid ester drawing and ironing lubricant emulsions and concentrates |
| US4776970 | 19 Nov 1986 | 11 Oct 1988 | San Nopco Limited | Lubricant for use in paper coating and method for producing the same |
