Improvements in or relating to the purification of coal tar oils
US1791562A
Cracking oils
GB301420A
An improved process for refining low temperature tar, tar oils of any origin, crude benzene and products obtained by the destructive hydrogenation of carbonaceous materials
GB298484A
An improved process for refining low temperature tar, tar oils of any origin, crude benzene and products obtained by the destructive hydrogenation of carbonaceous materials
GB292932A
Improvements in or relating to the refining of petroleum
GB313067A
An improved process for the polymerisation of olefines
GB293109A
Improvements in or relating to ore smelting
GB284616A
Improvements in or relating to mineral lubricating transformer or other oils exposedat raised temperatures to air