1919—William A. Hamor and Charles W. Trigg, Pittsburgh, Pa., assignors to John E. King, Detroit, Mich., are granted a United States patent on a process for making a new soluble coffee. The process consists in bringing the volatilized caffeol in contact with a petrolatum absorbing medium, where it is held until needed for combination with the evaporated coffee extract.
1919—Floyd W. Robison, Detroit, is granted a United States patent on a process for aging green coffee by treating it with micro-organisms to improve its flavor and to increase its extractive value. The product is put on the market as Cultured coffee.
1919—William Fullard, Philadelphia, is granted a United States patent on a "heated fresh air system" for roasting coffee.
1919—A million-dollar propaganda for coffee is begun in the United States by Brazil planters in co-operation with a joint coffee-trade publicity committee.
1920—The third national coffee week is observed in the United States, this time under the auspices of the Joint Coffee Trade Publicity Committee.
1920—Edward Aborn, New York, is granted a United States patent on a Tru-Bru coffee pot, a device embodying striking improvements on the French filter principle.
1920—Alfredo M. Salazar, New York, is granted a United States patent on a coffee urn in which the coffee is made at the time of serving by using steam pressure to force the boiling water through the ground coffee held in a cloth sack attached to the faucet.
1920—William H. Pisani, assignor to M.J. Brandenstein & Co., San Francisco, is granted a United States patent on a vacuum process for packing roasted coffee.
1921—The Comité Français du Café is founded in France to increase the consumption of coffee.
1922—The São Paulo legislature at the solicitation of the Sociedade Promotora da Defeza do Café passes a bill increasing the export tax on coffee from Santos to 200 reis per bag to continue the propaganda for coffee in the United States for three years.