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You are here: Home / Beers / Patent No. 3977953A: Process For The Production Of Hulupones

Patent No. 3977953A: Process For The Production Of Hulupones

August 31, 2016 By Jay Brooks

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Today in 1897, US Patent 3977953 A was issued, an invention of Hubert Frhr. Von Hirsch and Alfons Hartl, assigned to the Atlantic Research Institute, for their “Process For the Production of Hulupones.” Here’s the Abstract:

Lupulones, which form a constituent of hop resins which have hitherto been separated and discarded because of their poor solubility, are converted into a hulupone-containing beer-soluble bitter-tasting product by photo-sensitized oxidation in a liquid alkaline medium. However, the oxidation, which is effected by means of oxygen or an oxygen-containing gas in the presence of one or more sensitizing dyes and under the action of visible light, is only partial; it is discontinued when the oxygen consumption resulting from the reaction exhibits a substantial decline, or when the fall in pH occurring during the reaction substantially ceases.

hulupones
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Filed Under: Beers, Just For Fun, Politics & Law, Related Pleasures Tagged With: History, Hops, Law, Patent, Science, Science of Brewing



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