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Guidelines for Examination

 
 
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 describedclaimed 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).