Example: In a process where substance A and substance B are transformed at high temperature into substance C, it was known that there is in general a constantly increased yield of substance C as the temperature increases in the range between 50 and 130  C. It is now found that in the temperature range from 63 to 65  C, which previously had not been explored, the yield of substance C was considerably higher than expected.

Example: In the example of a substituted chemical compound given at 3.1(iv) under 3.1 above, the invention again resides in the selection of the substituent radical "R" from the total field of possibilities defined in the prior disclosure. In this case, however, not only does the selection embrace a particular area of the possible field, and result in compounds that can be shown to possess advantageous properties (see IV, 9.11 and VI, 5.3.5) but there are no indications which would lead the person skilled in the art to this particular selection rather than any other in order to achieve the advantageous properties.