Today in 2008, US Patent 7332342 B2 was issued, an invention of Isao Kishinami, assigned to Sapporo Breweries Ltd., for his impossibly long patent name, “Disposing barley kernels with husks in a sulfuric acid solution having a 40% to 60% concentration, agitating the solution having the barley kernels disposed therein for a prescribed time, and observing the degree of husk remaining on the barley kernels subsequent to the agitation.” Here’s the Abstract, only slightly longer than the title:
An object of the present invention is to provide a method for evaluating the physical strength of husks of a barley ingredient for malt manufacture. Barley kernels with husks are disposed in a sulfuric acid solution with a concentration of approximately 40% to 60%, and are agitated for a prescribed time (e.g. approximately 1 hour) using a stirrer bar or the like. After agitation, the barley kernels are treated with a mixed liquid of Methylene Blue and Eosin, and the degree of peeled husk (remaining degree) is examined by referring to the degree of dyed barley kernels, to thereby evaluate the physical strength of the husks of the barley kernels.