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CAFC reminds applicants to be wary of functionally defined genus claims
| July 22, 2014
AbbVie Deutschland GMBH & CO., KG et al., v. Janssen Biotech, Inc.
July 1, 2014
Panel: Lourie, O’Malley, and Chen. Opinion by Lourie. Concurring opinion by O’Malley.
Summary
Functionally defined genus claims can be inherently vulnerable to invalidity challenge for lack of written description, especially in technology fields that are highly unpredictable, where it is difficult to establish a correlation between structure and function for the whole genus or to predict what would be covered by the functionally claimed genus. Functionally defined claims can meet the written description requirement if a reasonable structure-function correlation is established, whether by the inventor as described in the specification or known in the art at the time of the filing date.
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