That really depends on airport loading, how many immigration officers are on duty, if it is holiday/break time, if the LA and SF flights got in just before you, etc,etc,etc but normally my bags are on the carousel before we clear immigration but the fastest we ever did arriving from Hong Kong with quite a lot of luggage was 25 mins from parking at the gate to getting in an airport taxi, and one more if you are not being met DO USE and airport taxi. I woud allow one hour to be on the safe side