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Calling almond milk a milk drink is a bad idea. It should be milk-like almond drink.

Almond milk has a etymology in English dating all the way back to 1381. https://www.oed.com/dictionary/almond-milk_n

Alternative milks were common in a time period before refrigeration and pasteurization. It just kept longer.

This patents a machine for pasteurization. The fact of pasteurization, getting milk to the target temperature, is not copyrightable. You would just have to use a different machine but you could still pasteurize.

My favorite snack ever, since discontinued, are also covered by patent. Partially popped popcorn that used to be at Trader Joe's.

https://patents.google.com/patent/US7579036B2/en