Case T-3/20: Judgment of the General Court of 16 December 2020 — Forbo Financial Services v EUIPO — Windmöller (Canoleum) (EU trade mark — Opposition proceedings — Application for the EU word mark Canoleum — Earlier international word mark MARMOLEUM — Relative ground for refusal — Late filing of the statement of the grounds of appeal — Inadmissibility of the appeal before the Board of Appeal — Request for restitutio in integrum — Sudden illness of the lawyer representing the applicant — Duty of due care — Probative value of the affidavit made by the lawyer)