Inventive step is found
Critical significance is admitted, but it is not decisive.
It is not admitted by the evidence that the problem of the present invention was known.
“In Comparative Examples, all of which exceed an upper limit value of 1.5% of the heat loss of the Invention 1, the evaluation of the surface property of the coating film is ‘C’, and therefore, the upper limit value of the heat loss of 1.5% is of critical significance to the invention.
The present invention makes it a problem to be solved that the volatile content of the crosslinked acrylic acid-based resin particles causes unevenness or the like on the surface of the coating film, resulting in a decrease in the scratch performance of the surface of the coating film, and thus the problem of the present invention does not appear in the main cited invention.
The problem of the present invention and the adoption of a configuration of reducing the amount of heat loss in order to solve the problem cannot be deemed to have been known to a person skilled in the art at the time of the priority date of the present invention.”
<Writer: Hideki Takaishi (Attorney-at-law licensed in Japan and California)>