[4] The company also had a manufacturing and engineering presence in Europe focused on water treatment, with facilities in England, France, Germany and Italy, which it sold a >80% stake in to Estel in 1975 in order to raise capital for expansion in other areas; products and services acquired by Estel were subsequently provided to customers through its EMSIL subsidiary.
[5] In 1971, the company consolidated the majority of its research and development operations to a site in downtown Salt Lake City, Utah.
[8] Prior to this, in 1972, Buell had been noted as being one of three units (the others being Norblo and Arco) which were bound together into a new Air Pollution Control Group, the first president of which was Robert E.
[10] The driver behind formation of Envirotech was "to create in one corporation a total systems capability to handle major environmental pollution problems.
[1] Rockwell's major contribution was in the form of knowledge and intellectual property in the areas of pollution control and waste water treatment.
[2] Envirotech diversified into air pollution control in mid-1971 when it acquired three companies: Buell Engineering (of Lebanon, Pennsylvania), Norblo and AMBUCO (of England).