Current compressed air dryer types include the following products: 1  Refrigerant type: Cycling. 2  Regenerative desiccant type: Heatless (no internal or external heaters) Heated (internal or external heaters) Heat of Compression. 3  Single Tower Deliquescent. 4  Membrane.
History. Canadian Marcellus Gilmore Edson (February 7, 1849 â March 6, 1940) of Montreal, Quebec was the first to patent peanut butter, in 1884. Peanut flour already existed. His cooled product had a consistency like that of butter, lard, or ointment according to his patent application.
Carver's promotion of peanuts gained him the most notice. In 1919, Carver wrote to a peanut company about the potential he saw for peanut milk. Both he and the peanut industry seemed unaware that in 1917 William Melhuish had secured patent #1,243,855 for a milk substitute made from peanuts and soybeans.