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.
Peanuts are a native plant in the tropical regions of the Western Hemisphere, and there is evidence that the Aztec Indians made peanut butter hundreds and hundreds of years ago. Peanut butter as we know it today received a US patent in 1884; the patent was granted to a man from Quebec, Canada.