1654 - Humphrey Primatt, drug and chemical manufacture at 66 Aldersgate Street, London

1744 - Primatt family business joined by John Maud (d. 1782), in partnership as Primatt and Maud

by 1753 - Maud and Primatt Chymists

1798 to 1820 - John Maud Jnr assumed control of the Company

1821- 1828 - Biggar. Atkinson and Dell

1835 - Biggar, Atkinson and Chippindale

1839 - Atkinson, Chippindale and Biggar

1843-1864 Atkinson and Biggar

1865 - George Atkinson and Company

1887 - manufacturing business acquired by Whiffen and Sons established some two hundred years earlier and with a reputation for drug grinding, oil pressing, and saltpetre refining.