496. Patent for analogous user.

Many patents are for the user of old apparatus, integers or processes for a new purpose. Inventiveness in these cases has to be judged, in general, by considering whether the new user lies so far out of the track of the former use that it would not suggest itself naturally to a person reasonably skilled in the particular art but would require thought and study1.

The inventive art necessary to support a patent for the new user may lie in the appreciation of the fact that the problem to be overcome may be solved by the use of old means2,