Crock Pot Corn Chowder

3 c corn
2 medium potatoes
1 chopped onion
2 c milk
1/2 tsp seasoned salt
1/8 tsp pepper
2 c chicken broth
1/4 c butter
Combine all ingredients except milk & butter & cook 7 hours. Pour into blender & puree. Stir in milk & butter. Cook on high for 1 hour.