1
Samuel C Bright, Dennis Postlethwaite: Bleaching compositions having quarternary ammonium activators. Lever Brothers Company, Milton L Honig, James J Farrell, August 9, 1983: US04397757 (65 worldwide citation)

In a hydrogen peroxide bleaching system it is known to use an activator which forms a peracid bleaching species; specific esters have been proposed previously as activators. The present invention defines esters having a substantive moeity which provides improved bleaching by giving peracid generatio ...


2
Dennis Postlethwaite: Bleaching compositions and process for cleaning fabrics. Lever Brothers Company, October 10, 1978: US04119557 (34 worldwide citation)

Bleaching compositions comprising a hydrogen peroxide liberating persalt, such as sodiumperborate, and a preformed ferric ion complex with a polycarboxyamine-type chelating agent, selected from the group consisting of ethylene diamine tetraacetic acid, nitrilotriacetic acid, diethylene triamine pent ...


3
Dennis Postlethwaite: Detergent bleach compositions. Lever Brothers Company, Melvin H Kurtz, April 20, 1982: US04325828 (13 worldwide citation)

A solid detergent bleach composition adapted for use at substantially any washing temperature, comprising essentially a detergent active compound and a synergistic mixture of a solid organic peroxy acid compound e.g. diperoxyazelaic acid, an inorganic peroxy compound e.g. sodium perborate and a stab ...


4
Derek Oldfield, Dennis Postlethwaite: Transfer apparatus. Wean United, Daniel Patch, Henry C Westin, July 20, 1976: US03970191 (6 worldwide citation)

Transfer apparatus for a workpiece such as a metal slab, bloom or coil of metal strip comprises a carriage supported on a substantially horizontal beam. The beam is displaceable in the direction of its length and the ends of a flexible cable are connected to opposite ends of the carriage with a reac ...