Re: Cooling attic (and home) by spraying water on roof (shingles) - good/bad?

[Some Guy <Some@xxxxxxx>]

Probably another reason why you don't see this in residential
settings:

Patent 4175703: Spray cooling system for gable roof

http://www.freepatentsonline.com/patents/us/417/4175703/4175703.pdf

In the USA, you can patent almost anything, regardless if it is
similar to what is already in practice, or what is generally "known to
those skilled in the art".

In this case, the above patent (granted in 1979) at the time the use
of evaporative roof cooling was well known for industrial / commercial
flat roofs.  How this guy got a patent for use on a gable roof is
beyond me.

The patent office is full of examples of things we don't see as
consumers because some bone-head thought he could get rich by
patenting something trivial and obvious.  All he ends up doing is
wasting his money on a patent.

I would think that the patent has now expired.