Patents Assigned to Edwin Cooper and Company Limited
  • Methylene bis-phenol alkanoic acid compounds
    Patent number: 3954808
    Abstract: Novel compounds, useful as intermediates in the preparation of lubricant additives, are described by specified general formulae and as condensation products of (i) an alkyl-substituted monohydric phenol, phenol sulphide or alkylene bis-phenol in which the alkyl substituent contains at least 8 carbon atoms and (ii) a carbonyl-substituted compound selected from the group consisting of glyoxylic acid, pyruvic acid, levulinic acid, 3-oxoglutaric acid, 2-oxoglutaric acid and esters of such acids.
    Type: Grant
    Filed: November 1, 1973
    Date of Patent: May 4, 1976
    Assignee: Edwin Cooper & Company Limited
    Inventors: John Scotchford Elliott, Bryan Terence Davis, Richard Martin Howlett