Industrial Abrasives Distributor Chemical Toll ...
In 1977, AGSCO established a plant in South Dakota to screen crushed quartz abrasive grain for the coated abrasive market and other industrial markets. On 28 August 1980, Edward M. Pinsof and Harvey R. Plonsker purchased the American Graded Sand Company from Herbert Wenske and formally renamed the company AGSCO Corporation.