Step by Step towards Inventive Step – Determining the Closest Prior Art comes first (R 5/13 et al.)
In the oral proceedings held in the EPO appeal case T 1760/11 the Board of Appeal (BoA) 3.3.01 selected one single closest prior art (CPA) document for the inventive step assessment and then denied the opponents the opportunity to present inventive step attacks starting from other CPAs. Petitions for review under Article 112a EPC were…