Funeral services, were con ducted this afternoon in Log An geles for Dean W. Stout, 55, who, as an associate of J. Ed ward Eberle, established the Edward Dean Museum of Dec orative Arts in Cherry Valley. Mr. Stout died last Thursday in Painesville, Ohio, where he had been hospitalized for the past month. A native of Salt Lake City, Utah, he had been a California resident since 1921. Mr. Eberle and Mr. Stout first moved to Cherry Valley as weekend residents in 1949 when their permanent home was in Los Angeles where they owned and managed a decorative arts studio. In 1957 they built the museum and moved to their Cherry Val ley estate permanently, until three years ago when they moved to Corona del Mar after donating the museum to River side County as an art and cul tural center. Mr. Stout leaves an uncle and aunt, Mr. and Mrs. Herman Rasche of Tucson, Ariz., and an uncle, William Lovett of Tor rance.