Company Filing History:
Years Active: 1986-1988
Title: Innovations of John M Cowles
Introduction
John M Cowles is a notable inventor based in Whitefish Bay, Wisconsin. He has made significant contributions to the field of brewing through his innovative patents. With a total of 3 patents, Cowles has focused on enhancing the quality and stability of hop extracts used in malt beverages.
Latest Patents
One of Cowles' latest patents is for "Light stable hop extracts and method of preparation." This invention outlines a method for preparing anactinic hop extracts through a three-stage process. The first stage involves pre-purification of a liquid CO₂ hop extract using liquid-liquid extraction to isolate pure humulones or alpha acids. The second stage is the isomerization/reduction of the humulones to obtain a mixture of reduced isohumulones and non-isohumulone light unstable products (NILUPS). Finally, the mixture is treated with alkali and water, heated, and stirred to extract the reduced isohumulones into an aqueous phase, resulting in a light stable hop extract suitable for malt beverages.
Another significant patent by Cowles is the "Preparation of tetrahydroisohumulones." This patent describes a method for preparing tetrahydroisohumulones from beta-acids without the use of objectionable organic solvents. The process involves treating beta-acids to form desoxytetrahydrohumulones, which are then dissolved in an aqueous alcoholic caustic solution. The solution is oxidized and isomerized with an oxygen-containing gas in the presence of a metallic ion to produce the desired tetrahydroisohumulones.
Career Highlights
John M Cowles is associated with Miller Brewing Company, where he has applied his expertise in brewing technology. His work has contributed to the development of innovative brewing processes that enhance product quality and consumer satisfaction.
Collaborations
Cowles has collaborated with notable colleagues such as Henry Goldstein and Patrick L Ting. Their combined efforts have led to advancements in brewing science and technology.
Conclusion
John M Cowles is a distinguished inventor whose work in brewing has led to significant innovations in hop extract preparation. His patents reflect a commitment to improving the quality and stability of malt beverages. Cowles' contributions continue to influence the brewing industry positively.