(Astoria, OR)  --  Police are looking for a 68-year-old Astoria woman who's been reported missing.  Officials say Patricia Blake, who suffers from dementia, hasn't been seen since around 1:30 Sunday afternoon near the Astoria Mini Mart.  Police say Blake is five-feet-eight, weighs 170 pounds, has light-brown hair, and was last seen wearing a knee-length, yellow wind-breaker with a hood, turquoise sweatpants, an olive-green stocking cap, and wire-rim glasses.  Anyone who has information about Patricia Blake's location is asked to call Astoria Police at 503-325-4411.