Waltham Miss Kathleen M. OBrien of Waltham, died Tuesday, October 14, 2003 in Westridge Nursing Home, Marlboro. She was 93. A lifelong Waltham resident, Miss OBrien was an inspector at the New England Mica Company until her retirement. Miss OBrien was the daughter of the late Michael and Sarah (Spellman) OBrien and the sister of the late Irene P. Gallant, Francis A. 'Buddy' OBrien, John OBrien, and Mary Tully. She is survived by many nieces and nephews. The Funeral will be held at 9 a.m. Friday from The Joyce Funeral Home, 245 Main Street (Rte. 20), Waltham followed by a Funeral Mass in the Blessed Sacrament Chapel of Saint Charles Borromeo Church, 51 Hall Street, Waltham at 10 a.m. Burial will be in Mount Feake Cemetery, Waltham. Visiting hours are Thursday from 4-7 p.m.