4.4. Isolated mistake within a satisfactory system for monitoring time limits or for processing mail

An isolated mistake in a normally satisfactory system is excusable (see for example T 1024/02, T 165/04 and T 221/04); the appellant or his representative must plausibly show that a normally effective system for monitoring time limits prescribed by the EPC was established at the relevant time in the office in question (J 2/86, J 3/86, OJ 1987, 362; J 23/92; J 13/07; J 3/12; J 4/12).

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