As I read that, the arrival at JFK was 4:14 late. That entitles OP to EUR 600.

In your OP, you spoke of a late departure, but that is irrelevant. All that matters is your arrival time at your final ticketed destination. As you can see, your aircraft made up 22 minutes of the 4:36 departure delay. Had it made up another 15 minutes --- which would be pretty common --- you would only have been due EUR 300.