William Marshall Callender
William Marshall Campbell Callender
1859 Born in Govan, son of William Ormiston Callender and his wife Jean nee Marshall[1]
1877 His father took him and his brother Thomas into business as Callender and Sons, refiners of bitumen and for asphalt paving. Offices at 150 Leadenhall Street, London, with a small refinery at Millwall, where the bitumen was landed.
1881 Bitumen Manufacturer, lived with his parents in Hammersmith[2]
1881 Developed vulcanized bitumen which his father patented.
Moved to Guernsey
1893 Patented a material made from skimmed milk which could be substitute for bone or celluloid. Several more patents followed on various subjects
1911 Research chemist, employer, living in Guernsey[3]
1912 Patented a method of making isoprene or similar hydrocarbons.