Date of Patten Furnace?

Can anyone help me date a Patten Automatic Furnace? Gas fired, in a house built about 1960. Model OB2168, S/N 62222. Stood about 5 feet tall.

Don Bissex
Melrose, Massachusetts

I have no information on Patten. However, if I had to take an educated guess, I would say 1962, around June.