LOWELL - Patricia M. (Kelly) Smith died yesterday, Aug. 29, at her home in Lowell. She was 67.Born in Lowell on June 9, 1937, she was a daughter of the late Christopher J. and Lena (Chase) Kelly. She was a graduate of Lowell High School.Prior to her retirement, Ms. Smith was a medical secretary.She is survived by two sons, Richard P. Smith of Pelham and Kevin P. Smith of Lowell; a daughter and son-in-law, Kelly and David Boulard of Litchfield, N.H.; a brother, Carl T. Kelly of Merrimack, N.H.; a sister, Christina O'Connell-Lambert of Groveland; and many nieces and nephews. She was also the sister of the late Rita Lowney, Mary O'Conner, Margaret Driscoll and Christopher Kelly.