Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 146,020 pages of information and 231,556 images on early companies, their products and the people who designed and built them.
of Excelsior Works, Rollins Street, Canterbury Road / Ilderston Road, London, SE15. Telephone: New Cross 1913-7. Cables: "Ebonestos 'Phone, London"
1913 The Ebonestos Manufacturing Company of 127 Pomeroy Street, New Cross, London, S.E. Issued a catalogue with reference to Ebonestos insualtors, including bushes, caps, washers, handles etc.
1937 Manufacturers to the trade of precision mouldings in bakelite and other synthetic resins, also in Ebonestos plastic composition. 
1939 Patent - Improvements in and relating to injection moulding of synthetic materials. 
1939 See Aircraft Industry Suppliers
1943 Patent - Improvements in and relating to the moulding of boxes from laminations of felted fibrous materials impregnated with synthetic resins. 
1947 Listed Exhibitor - British Industries Fair. Manufacturers of Plastic Mouldings in Synthetic and Natural Resin and Bitumen for the Electrical, Scientific Instruments, Telephone, engineering, Motor Car and Aircraft, Building, Toys and Fancy Goods Industries. (Earls Court, 1st Floor, Stand No. 836)