7. Changes in claim category in opposition
7.4 Method claim to use claim
The change from a process for the preparation of a product to the use of the product for a purpose other than previously claimed is not allowable (see T 98/85 and T 194/85).
On the other hand, the change in a claim from a method in which a certain product is used to a claim to the use of that product in performing that same method is allowable (see T 332/94).