Burgess, Ryan & Wayne
Novel n-substituted polyamide type polymers, their method of preparation and their use as additives for crude petroleum oils
 Polymer compounds resulting from the condensation of polyacrylic acids having a molecular weight comprised between 10,000 and 2,000,000 and alkylamines containing at least 12 carbon atoms in their chain. These products constitute paraffin deposit inhibitors and pour point depressants for crude petroleum oils. 
Societe Nationale ELF Aquitaine
C C
C10L C08F
inventional inventional
Luc Denis Paul Gilles
Navascues Lopez Maldonado Meunier