Maple seed are best planted directy after they riped, as far as I know. Drying them might have reduced their viability.
Maples need a period of cold stratification of 1-3 months. So the frequently seen course of action would be to soak them in water for 24 hrs. Then place them on moist spaghnum moss, in a baggy in the fridge. After 3 months plant them in pots and wait. For me, I normally plant seeds in pots directly after soaking, in fall. Then place the pots outside under a bench in the shade out of the wind under a piece of wiremesh (against rodents & birds). THen I wait for spring and the seeds germinate. To me, that is how nature designed the system and that is good enough for me.