See ISPE Guidelines 4.13.[Art.

A detailed description of at least one way of carrying out the invention must be given. Since the application is addressed to the person skilled in the art, it is neither necessary nor desirable that details of well-known ancillary features should be given, but the description must disclose any feature essential for carrying out the invention in sufficient detail to render it apparent to the skilled person how to put the invention into practice.

See ISPE Guidelines 4.32.[Art. 21(6); ]

 

See ISPE Guidelines 4.30.[Rule 9.1(iii); ]

There are four categories of expressions which should not be contained in an international application, as specified in Rule 9.1. See ISPE Guidelines 4.29.[Rule 9.1; ]