Understanding The Doctrine of Purposive Construction

The doctrine of purposive construction is a principle in patent law that emphasizes interpreting patent claims in a way that reflects the purpose or intent behind the invention.

Key Aspects

• Focus on the Inventive Concept
• Contextual Interpretation
• Skilled Person Test
• Avoiding Narrow Literal Interpretations

Legal Basis and Evolution

Most famously articulated in the UK case of Catnic Components Ltd v Hill & Smith Ltd (1982).

Reaffirmed in Regeneron Pharmaceuticals v Kymab (2017).

Importance in Patent Litigation

• Broader Claim Protection
• Flexibility
• Prevention of Unjust Technicalities