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.
1 1904: C.H. 2  Sumner introduced peanut butter to the world at the Universal Exposition in St. Louis. 3  He sold $705.11 of the treat at his concession stand! 4  1908: Krema Products Company in Columbus, Ohio, began selling peanut butter and is the oldest peanut butter company still in operation today.