IPA patent 4.2.2.2.4-special-rules — IP Australia Patent Manual of Practice and Procedure – 4.2.2.2.4 Special Rules

Also in this Chapter: 4.2.2.2.1 Common Rule 4.2.2.2.2 First Place Priority Rule 4.2.2.2.3 Last Place Priority Rule ​​​​​​​ 4.2.2.2.5 Classifying a Combination of Technical Subjects In a limited number of areas of classification, special classification rules are used and they override the general classification rules. Wherever special rules are used, they are clearly specified in notes at the places concerned, for example, C04B 38/00, C08L, G05D. For example, Note 2(b) following the title of subclass C08L (“Compositions of macromolecular compounds”) specifies that, in this subclass, compositions are classified according to the macromolecular constituent or constituents present in the highest proportion; if all these constituents are present in equal proportions, the composition is classified according to each of these constituents.