Case T-215/13: Judgment of the General Court of 15 July 2015 — Deutsche Rockwool Mineralwoll v OHIM — Recticel (λ) (Community trade mark — Revocation proceedings — Community figurative mark λ — Genuine use — Use as part of a composite mark — Proof of use — Articles 15 and 51(1) of Regulation (EC) No 207/2009)