For over 30
years, Barry Fox has trawled the world's weird and wonderful
patent applications each week, digging out the most exciting,
intriguing and even terrifying new ideas. His column, Invention,
is available exclusively online.
Coffee-beer
A drink somewhere
between coffee and beer could soon be on the menu. Nestec, part
of the Nestlé empire in Switzerland, has filed patents in every
major market round the world on a "fermented coffee beverage"
that pours and foams like beer, but smells of strong coffee and
packs a concentrated caffeine kick.
The beverage is
made in a similar way to beer, but fine-tuned temperature
control stops the formation of ethyl alcohol. So the new drink
could go down well with people who want a long tall pick-me-up
while driving.
Nestlé admits it
was tricky to preserve the characteristic coffee smell in the
production process. Coffee beans are roasted normally, and the
chemicals containing the natural aroma collected in a cryogenic
condenser, before being converted into coffee oil. The remains
of the roast are then ground to powder, mixed with yeast and
sucrose, and fermented for 4 hours at just below 22°C. At this
temperature the yeast can still metabolise but does not generate
alcohol.
The aroma oil is
then mixed in with the liquid and nitrogen is injected to make
it foam. Adding a touch of extra sugar also helps trap the aroma
until the drink is poured, Nestlé claim.
Read
coffee-beer patent,
here.